COBALT OCTOATE 6%

Cobalt Octoate 6% (Cobaltous Octoate), CAS No. 136-52-7 and chemical formula C₁₆H₃₀CoO₄, is a cobalt-based metal carboxylate drier derived from cobalt(II) 2-ethylhexanoate and used to accelerate oxidative drying in paint, varnish, and coating formulations.

Cobalt 2-Ethylhexanoate, Cobalt Bis(2-Ethylhexanoate), Cobaltous Octoate, and Cobaltous 2-Ethylhexanoate, Cobalt Octoate 6% is a functional chemical additive that supports drying performance in paint and coating formulations.

Cobalt Octoate 6% (Cobaltous Octoate) is a cobalt-based paint drier used in alkyd paints, varnishes, industrial coatings, and wood coatings to accelerate oxidative drying.

Particularly suitable for solvent-based paint and varnish systems, Cobalt Octoate 6% is a siccative additive that promotes surface drying, improves drying performance, and enables formulators to develop resin-specific drier combinations with other metallic driers.

Cobalt Octoate 6% is a cobalt-based oxidative drier used in paint and varnish formulations to help reduce slow drying, surface tackiness, and prolonged drying times.

Cobalt Octoate 6% is a high-performance cobalt-based paint drier incorporated into alkyd paints, varnishes, and industrial coatings to shorten drying times and enhance overall drying efficiency.

Cobalt Octoate 6% is a functional siccative additive that provides formulators with the flexibility to control drying performance and develop drier combinations tailored to different resin systems.

Cobalt Octoate 6% is a cobalt-based chemical paint drier used in alkyd paints, wood varnishes, and industrial coatings to accelerate drying, support faster surface readiness, and improve production efficiency.

Cobalt Octoate 6% is a cobalt-based siccative additive that catalyzes the oxidative drying of alkyd resins at the molecular level, accelerating coating film formation in paint and varnish formulations.

Cobalt Octoate 6%, based on cobalt 2-ethylhexanoate chemistry, promotes the reaction of oxygen with unsaturated sites in resin structures, supporting faster drying and durable film formation in alkyd paints and varnishes.

Cobalt Octoate 6% is a cobalt-based siccative additive used in alkyd paint and varnish formulations to provide effective oxidative drying support and rapid drying performance at low addition levels.

Based on cobalt 2-ethylhexanoate chemistry, Cobalt Octoate 6% is a metallic drier that enables paint, varnish, and industrial coating manufacturers to develop resin-specific drier combinations and optimize drying performance.

Cobalt Octoate 6% is a cobalt-based chemical additive used in selected water treatment and industrial water treatment formulations to help regulate product characteristics and support the intended performance of process chemicals.

Cobalt Octoate 6% is a specialized cobalt 2-ethylhexanoate-based additive used in selected agricultural, fertilizer, and crop protection formulations to help formulators optimize formulation components and support the intended product performance for end users

What Is Cobalt Octoate 6%?

Cobalt Octoate 6% is a cobalt-based metal carboxylate drier used to accelerate oxidative drying in paints, varnishes, coatings, printing inks and suitable resin systems. It is particularly relevant to alkyd-based formulations, where it is commonly evaluated as a Cobalt Drier, Cobalt Surface Drier, Cobalt Primary Drier, Alkyd Drier or Paint Drier.

Cobalt Octoate is also known as Cobalt 2-Ethylhexanoate, Cobalt(II) 2-Ethylhexanoate, Cobalt bis(2-ethylhexanoate), Cobaltous Octoate and Kobalt Oktoat. The active chemical is Cobalt bis(2-ethylhexanoate), identified by CAS No. 136-52-7 and EC/EINECS No. 205-250-6.

The “6%” in Cobalt Octoate 6% generally refers to an approximate 6% metallic cobalt content in the commercial product. Therefore, Cobalt Octoate 6% should not be considered identical to pure Cobalt bis(2-ethylhexanoate). The pure active substance is a defined chemical compound, while the 6% grade is a commercial formulation prepared for practical industrial use.

This distinction is especially important for formulation calculations. The total amount of commercial product added to a formulation and the actual amount of metallic cobalt introduced into the system are not the same.

The most established application of Cobalt Octoate 6% is in oxidatively curing alkyd systems. The product accelerates oxidative curing reactions involving atmospheric oxygen and can contribute particularly to shorter surface-drying times.

Depending on the formulation, the use of Cobalt Octoate 6% may support a shorter tack-free time, faster recoating, reduced production waiting time and faster development of early film hardness.

Cobalt Octoate 6% should not be considered only as a paint drier. In suitable unsaturated polyester and vinyl ester systems, it may also be evaluated as a promoter or curing accelerator.

For this reason, technical evaluation of Cobalt Octoate 6% should consider the intended application, resin chemistry, solvent system, film thickness, pigment loading, metallic cobalt level and the other drier components together.

Common Names of Cobalt Octoate 6%

Cobalt Octoate

Cobalt Octoate 6%

Cobalt Octoate 6 Percent

Cobalt 2-Ethylhexanoate

Cobalt 2-Ethylhexanoate 6%

Cobalt(II) 2-Ethylhexanoate

Cobalt bis(2-ethylhexanoate)

Cobalt(II) bis(2-ethylhexanoate)

Bis(2-ethylhexanoate)cobalt

Cobaltous Octoate

Cobaltous 2-Ethylhexanoate

2-Ethylhexanoic Acid, Cobalt Salt

2-Ethylhexanoic Acid, Cobalt(II) Salt

Cobalt Drier

Cobalt Drier 6%

Cobalt Surface Drier

Cobalt Primary Drier

Cobalt Metal Drier

Cobalt Accelerator

Cobalt Accelerator 6%

Alkyd Drier

Paint Drier

Surface Drier

Metal Soap Drier

Oxidation Catalyst

Cobalt Drying Agent

Kobalt Kurutucu

Kobalt Drier

Some of these names describe the chemical identity itself, while others describe the commercial product class or functional role of the material.

For technical purchasing, stating the product name together with CAS No. 136-52-7 and EC No. 205-250-6 can help ensure that the intended chemical and commercial grade are evaluated correctly.

Cobalt Octoate 6% CAS No, EC No and INCI Name

The key identification information for Cobalt Octoate 6% is:

Chemical Name: Cobalt bis(2-ethylhexanoate)

Common Chemical Name: Cobalt(II) 2-Ethylhexanoate

Commercial Product Name: Cobalt Octoate 6%

CAS No: 136-52-7

EC / EINECS No: 205-250-6

INCI Name: COBALT BIS(2-ETHYLHEXANOATE)

Molecular Formula: C16H30CoO4

Molecular Weight: 345.34 g/mol

Chemical Class: Metal Carboxylate / Metal Soap

Metal Center: Cobalt

Cobalt bis(2-ethylhexanoate) is a cobalt-based metal carboxylate with the molecular formula C16H30CoO4.

CAS 136-52-7 and EC 205-250-6 are key identifiers for the active chemical substance.

Because Cobalt Octoate 6% is a commercial solution rather than pure active material, the molecular weight of the commercial product should not be represented as the molecular weight of the pure compound. The 345.34 g/mol value applies to the active Cobalt bis(2-ethylhexanoate) substance.

Chemical Structure of Cobalt Octoate 6%

The basic structure of Cobalt Octoate contains a cobalt center associated with 2-ethylhexanoate ligands.

The 2-ethylhexanoate portion contributes to the organic character of the molecule and supports compatibility with suitable organic resin and solvent environments.

The cobalt center is primarily responsible for the catalytic activity associated with oxidative curing.

This structure allows the cobalt center to participate in redox processes while the organic carboxylate environment facilitates the incorporation of the metal component into suitable resin and solvent phases.

The technical performance of Cobalt Octoate should therefore not be attributed to the cobalt atom alone. The metal center, ligand structure, compatibility, solubility and commercial carrier system all contribute to practical formulation behavior.

Chemical and Physical Properties of Cobalt Octoate 6%

When discussing the physical properties of Cobalt Octoate 6%, the difference between the pure active compound and the commercial 6% product must be maintained.

Pure Cobalt bis(2-ethylhexanoate) and commercial Cobalt Octoate 6% do not necessarily have the same physical properties.

Commercial product behavior is particularly influenced by its carrier system.

Appearance and Physical Form

Commercial Cobalt Octoate 6% products are generally supplied in liquid form.

The color is commonly described as purple, violet, blue-violet or dark violet, depending on the product grade and concentration.

This characteristic coloration is associated with the cobalt-containing chemical system and should be considered when formulating transparent, white or pastel-colored products.

Molecular Formula

The pure active compound is represented by:

C16H30CoO4

Molecular Weight

Pure Cobalt bis(2-ethylhexanoate):

Approximately 345.34 g/mol

Melting Behavior

For pure Cobalt bis(2-ethylhexanoate), melting behavior can vary with measurement conditions.

Approximate values around 53–58 °C may be observed under certain controlled conditions, while other measurement conditions may show melting behavior in the 64–84 °C range accompanied by decomposition.

Accordingly, it is more technically accurate to discuss the material in terms of melting behavior under specified test conditions rather than treating one number as an absolute universal melting point.

These values apply to the pure active substance.

Commercial Cobalt Octoate 6% contains a carrier system, so its physical behavior can differ substantially from that of the pure compound.

Boiling Behavior

Pure Cobalt bis(2-ethylhexanoate) may show decomposition around 90 °C rather than a simple clean boiling transition.

For this reason, its behavior can be described as decomposition occurring around this temperature range before conventional boiling.

Commercial Cobalt Octoate 6% does not have one universal boiling point because the carrier solvent has a major influence on its boiling behavior.

Density

The density of commercial Cobalt Octoate 6% depends on the carrier solvent, metallic cobalt concentration and commercial grade.

Density is particularly important for:

Volumetric dosing

Pump calibration

Liter-to-kilogram conversion

Storage tank calculations

Filling operations

Production formulation

For manufacturing, the exact density value should therefore be taken from the technical specification of the specific product being used.

Solids and Metallic Cobalt Content

Metallic cobalt content and total solids are not the same parameter.

A commercial product containing approximately 6% metallic cobalt may contain a carrier solvent and other components that determine the total non-volatile matter.

For formulation calculations, the following should be considered separately:

Total commercial product

Metallic cobalt

Total solids

Carrier solvent

Maintaining this distinction helps avoid errors during formulation scale-up and cost calculations.

How Does Cobalt Octoate 6% Work at the Molecular Level?

The drying action of Cobalt Octoate 6% is based on an oxidative curing mechanism.

In alkyd and related oxidative-curing resins, unsaturated fatty-acid-derived segments react with atmospheric oxygen.

A simplified representation is:

RH + O2 → ROOH

where hydroperoxide species are formed as oxidation intermediates.

The subsequent decomposition of hydroperoxides can generate reactive species that promote additional oxidation and crosslinking reactions within the resin.

As these reactions progress, the liquid coating develops a more crosslinked polymer structure and gradually transitions into a harder, more resistant film.

Cobalt Redox Cycle

One of the most important chemical characteristics of cobalt in oxidative drying is its redox activity.

A simplified conceptual mechanism can be represented as:

Co2+ + ROOH → Co3+ + reactive radical species

Co3+ + ROOH → Co2+ + reactive radical species

The actual mechanism in a real paint or resin system is significantly more complex.

The practical principle can be summarized as follows:

Hydroperoxides are generated during oxidation.

Cobalt participates in redox reactions.

Hydroperoxide decomposition is accelerated.

Reactive radical species are generated.

Oxidative reactions in the resin are promoted.

Crosslinking develops.

Film hardness begins to increase.

This catalytic process is the foundation of the performance of cobalt-based driers in suitable oxidative-curing systems.

Why Is Cobalt Octoate 6% Used as a Surface Drier?

The strong catalytic activity of cobalt during the early stage of oxidative curing makes Cobalt Octoate particularly relevant as a surface drier.

This is why it is frequently considered in relation to:

Surface dry

Tack-free

Dust-free

Recoat time

and other early film properties.

However, rapid surface drying does not necessarily mean that the complete film has cured at the same rate.

The difference between surface dry and through-dry is therefore one of the most important formulation considerations when working with Cobalt Octoate 6%.

Industries Using Cobalt Octoate 6%

Cobalt Octoate 6% can be evaluated in a wide range of industrial applications, including:

Paints

Industrial coatings

Alkyd paints

Varnishes

Wood coatings

Wood stains

Oil-based coatings

Printing inks

Oil-based inks

Alkyd resins

Unsaturated polyester systems

Vinyl ester systems

Composite resins

Polyester putties

Maintenance coatings

and other suitable oxidative or peroxide-curing formulations.

Cobalt Octoate 6% in the Paint and Coatings Industry

In the paint industry, Cobalt Octoate 6% is particularly relevant to oxidative-curing alkyd systems where controlled surface drying is required.

In products such as alkyd enamels, industrial paints, maintenance coatings, primers and topcoats, the material may help accelerate drying and reduce practical waiting time.

The objective is not simply to achieve the fastest possible drying.

The target is a balanced relationship between:

Surface dry

Tack-free

Recoat time

Through-dry

Hardness development

Film appearance

This balance determines the practical performance of the coating.

Cobalt Octoate 6% in Alkyd Resin Systems

The drier requirement of an alkyd resin depends on factors such as oil length, unsaturation level and binder solids.

Long-oil alkyds, medium-oil alkyds and different modified alkyd chemistries may not respond identically to the same Cobalt Octoate dosage.

The drier package should therefore be selected according to the actual chemical characteristics of the resin rather than by using one universal dosage.

Cobalt Octoate 6% in Varnish Systems

In oxidative-curing varnishes, Cobalt Octoate 6% can help accelerate surface drying.

Transparent varnishes require additional evaluation of:

Clarity

Color

Gloss

Haze

Film uniformity

Hardness

Because cobalt driers are characteristically colored, the influence of dosage on transparent systems should be evaluated carefully.

Cobalt Octoate 6% in Wood Coatings and Wood Stains

Wood coating and wood stain systems often benefit from controlled drying because drying time directly affects application efficiency and recoating speed.

With a suitable resin system, Cobalt Octoate 6% may support:

Faster surface drying

Shorter tack-free time

Faster second-coat application

Reduced waiting time

The moisture content of the wood, substrate porosity, application amount and ambient conditions should also be considered.

Cobalt Octoate 6% in Printing Inks

In oxidatively drying oil-based printing inks, Cobalt Octoate 6% can contribute to curing acceleration.

Important performance parameters may include:

Set time

Tack

Surface dry

Rub resistance

Final film development

The effect of cobalt depends on the complete ink formulation, including resin, pigment, oil or solvent system, film thickness and other driers.

Cobalt Octoate 6% in Unsaturated Polyester and Vinyl Ester Systems

Cobalt Octoate 6% can also be evaluated as a promoter or accelerator in suitable unsaturated polyester and vinyl ester resin systems.

This function is distinct from its surface-drier role in alkyd coatings.

In polyester systems, important parameters may include:

Gel time

Working time

Cure time

Peak exotherm

Final hardness

The formulation must therefore be evaluated according to the specific curing system rather than transferring alkyd-drier calculations directly into polyester chemistry.

Cobalt Octoate 6% in Composite Applications

In suitable polyester resin systems, Cobalt Octoate 6% may be considered for applications such as:

FRP

GRP

Fiberglass composites

Polyester panels

Polyester putties

Casting resins

Composite repair systems

The actual promoter requirement depends on the resin and peroxide curing technology being used.

What Problems Can Cobalt Octoate 6% Help Solve?

Cobalt Octoate 6% is primarily evaluated when an oxidative-curing formulation shows insufficient drying acceleration.

Potential formulation problems include:

Slow surface drying

Long tack-free time

Delayed recoating

Long dust-free time

Slow early hardness development

Long production waiting time

Delayed curing at low temperatures

Slow oxidative setting in oil-based inks

Slower curing in suitable polyester systems

Slow Surface Drying

When a coating surface remains wet or tacky for too long, the Cobalt Octoate drier system may be reviewed.

Improved surface drying can contribute to:

Reduced dust pickup

Faster second-coat application

Earlier packaging

Shorter production waiting time

Faster handling

Poor Through-Dry

Although cobalt is highly active in surface drying, it may not independently solve through-drying problems.

For thick films, factors such as:

Zirconium

Calcium

Manganese

Film thickness

Oxygen availability

Resin structure

should be considered together.

The goal is a balanced cure profile rather than simply increasing surface-drier activity.

Wrinkling

Excessive cobalt activity can contribute to a situation where the surface cures significantly faster than the underlying film.

This may result in:

Surface skin formation

Wrinkling

Delayed internal curing

Solvent trapping

Film stress

The correct objective is therefore optimum drying balance, not maximum cobalt concentration.

Benefits of Cobalt Octoate 6%

From a formulator’s perspective, Cobalt Octoate 6% may provide several functional advantages in suitable systems.

It can:

Accelerate oxidative curing

Reduce surface-drying time

Shorten tack-free time

Support shorter recoating intervals

Support early film hardness development

Contribute to shorter production cycles

Provide controlled cobalt-based catalytic activity

Support curing acceleration in suitable polyester systems

Benefits for Paint and Resin Manufacturers

For paint and resin manufacturers, the correct drier system can have a measurable effect on production efficiency.

Controlled and efficient drying can contribute to:

Earlier packaging

Faster shipment

Reduced intermediate waiting time

Faster recoating

Improved production flexibility

The benefit is therefore not limited to laboratory drying results. It can also influence practical production planning.

Benefits for End Users

For end users, the effect of Cobalt Octoate 6% is reflected through final product behavior.

In a properly balanced drier system, users may experience:

Faster surface drying

Reduced waiting time

Earlier second-coat application

Shorter handling time

More predictable application performance

Cobalt Octoate 6% Starting Formulation

There is no single universal formulation for Cobalt Octoate 6% that can be applied to every paint, coating or resin system.

The starting point should be established through the desired metallic cobalt concentration.

For example:

Binder solids: 1,000 kg

Target metallic cobalt: 0.05%

Required metallic cobalt:

1,000 × 0.0005 = 0.50 kg Co

If the commercial product contains 6% cobalt:

0.50 / 0.06 = 8.33 kg

Therefore, approximately 8.33 kg of Cobalt Octoate 6% would theoretically provide the calculated metallic cobalt target.

This calculation is intended to demonstrate the metal-based dosing principle. The optimum practical dosage must be established through laboratory and application testing.

Dosing According to COA Results

If a batch has an actual cobalt assay of 5.90%, the calculation becomes:

0.50 / 0.059 = approximately 8.47 kg

This illustrates why actual batch metal content can be relevant in precision formulation work.

For sensitive formulations, the actual Co value stated in the batch Certificate of Analysis may be used rather than assuming an exact nominal 6%.

Starting Approach for Polyester Systems

When Cobalt Octoate 6% is being considered as a promoter in polyester systems, the following should be evaluated together:

Resin

MEKP

Promoter concentration

Temperature

Gel time

Working time

Peak exotherm

Final cure

The dosage calculated for an alkyd paint should not automatically be transferred to a polyester resin.

Cobalt Octoate 6% and MEKP

In suitable polyester curing systems, cobalt promoters may be used together with MEKP.

However, concentrated Cobalt Octoate and concentrated MEKP should not be directly mixed together.

The promoter should be appropriately dispersed in the resin, while the organic peroxide should be handled through a controlled and validated addition procedure.

At production scale, the order of addition, mixing conditions and temperature control are critical safety and process parameters.

What Happens If Too Much Cobalt Octoate 6% Is Used?

Excessive dosage can lead to:

Excessively rapid surface drying

Wrinkling

Delayed internal curing

Solvent trapping

Film stress

Color effects

Gloss changes

Package skin formation

More cobalt does not necessarily mean better drying.

What Happens If Too Little Cobalt Octoate 6% Is Used?

Insufficient cobalt activity may result in:

Longer surface-drying time

Longer tack-free time

Longer recoating time

Longer dust-free time

Slower production cycles

However, slow drying is not always caused by insufficient cobalt.

Resin chemistry, temperature, film thickness, oxygen exposure, solvent evaporation and the rest of the drier package should also be evaluated.

Cobalt Octoate 6% vs Zirconium Octoate

Cobalt Octoate 6% is primarily associated with surface-drier and primary-drier activity.

Zirconium Octoate is generally evaluated as a complementary drier that can contribute particularly to through-drying and overall film development.

A simplified formulation concept can therefore be expressed as:

Cobalt = Surface Dry

Zirconium = Through-Dry Support

These materials may function as complementary components rather than direct substitutes.

Cobalt Octoate 6% vs Calcium Octoate

Calcium Octoate is generally considered an auxiliary drier.

Cobalt provides significantly stronger primary surface-drying activity.

Therefore, Calcium Octoate should not automatically be considered a direct one-to-one substitute for Cobalt Octoate 6%.

Cobalt Octoate 6% vs Manganese Drier

Manganese driers may be evaluated as alternative or complementary drier systems.

However, the different metal center means that the curing profile is not identical.

The comparison should consider:

Surface dry

Through-dry

Hardness development

Color behavior

Low-temperature cure

Gloss

Film appearance

Overall drier balance

Cobalt Octoate 6% vs Cobalt Naphthenate

Both materials can be considered within the broader cobalt carboxylate drier family.

Cobalt Octoate is based on 2-ethylhexanoate chemistry, while Cobalt Naphthenate is derived from naphthenate chemistry.

Consequently, they may differ in:

Color

Viscosity

Solubility

Resin compatibility

Drier activity

Storage behavior

Cobalt Naphthenate should therefore not automatically be treated as a one-to-one equivalent of Cobalt Octoate 6%.

Cobalt Octoate 6% vs Cobalt Neodecanoate

Cobalt Neodecanoate is another cobalt-based drier system that may provide similar functional effects in selected applications.

However, the ligand structure is different, so practical behavior may vary in terms of:

Solubility

Solvent compatibility

Color

Viscosity

Catalytic activity

Storage stability

Any substitution should therefore be validated in the actual formulation.

Cobalt Octoate 6% and Different Cobalt Concentrations

Commercial cobalt driers may be available at different metallic cobalt concentrations.

Examples can include:

Cobalt 4%

Cobalt 6%

Cobalt 8%

Cobalt 10%

Cobalt 12%

A higher cobalt concentration may allow the formulator to use less commercial product for the same metallic cobalt target.

However, cobalt concentration alone does not determine overall product suitability.

The following should also be evaluated:

Carrier solvent

Dose level

VOC

Storage behavior

Pumping characteristics

Drying performance

Cost per active cobalt

Which Cobalt Octoate 6% Grade Should I Choose?

Grade selection should always be application-specific.

For alkyd paints, important parameters include:

Metallic cobalt

Surface dry

Through-dry

Solvent compatibility

Film appearance

For varnishes:

Color

Clarity

Gloss

Haze

Drying behavior

For printing inks:

Set

Tack

Rub resistance

Surface dry

For polyester systems:

Gel time

Cure time

Working time

Peak exotherm

Final cure

Which Physical Properties Matter When Selecting Cobalt Octoate 6%?

Important parameters include:

Metal Co %

Density

Viscosity

Appearance

Color

Carrier solvent

Total solids

Flash point

Clarity

Sediment

Storage stability

Shelf life

Density and viscosity become particularly important in plants using automated dosing or pump-based transfer systems.

Is Cobalt Octoate 6% Suitable for My Process?

If your process involves solvent-based alkyd paint, Cobalt Octoate 6% is a strong candidate for technical evaluation as a primary surface drier.

In alkyd varnishes, it can be evaluated to support surface drying.

In oil-based printing inks, it can contribute to oxidative curing performance.

In suitable unsaturated polyester or vinyl ester systems, it may be used as a promoter.

In water-based systems, however, a standard solvent-based Cobalt Octoate 6% grade should not automatically be considered suitable without formulation testing.

For transparent systems, color and clarity require additional attention.

For thick-film systems, surface dry and through-dry should be evaluated separately.

When Should Cobalt Octoate 6% Be Added to the Formulation?

The correct point of addition depends on the manufacturing process.

Cobalt Octoate may be considered during:

Grinding

Let-down

Final adjustment

The optimal addition point should account for the interaction between:

Pigments

Resins

Solvents

Driers

Anti-skinning additives

Other formulation components

There is no single addition sequence that is universally correct for every formulation.

Cobalt Octoate 6% and Pigment Compatibility

Pigment surfaces may influence the behavior of metal driers.

Some pigments can interact with cobalt or alter its effective availability and therefore change the drying profile.

A clear varnish and a high-PVC primer may not respond identically to the same cobalt dosage.

High-pigment systems should therefore be tested using the actual resin and pigment package.

Cobalt Octoate 6% and Film Thickness

Drying behavior changes as film thickness increases.

In thin films, oxygen access may be relatively efficient.

In thick films, the surface can cure more quickly while the underlying layer remains slower to develop full cure.

For this reason, industrial coatings applied at higher dry-film thickness should be evaluated for both surface drying and through-drying.

Cobalt Octoate 6% and Ambient Temperature

Oxidative curing is influenced by temperature.

At lower temperatures:

Reaction kinetics may slow down.

Solvent evaporation may change.

Resin viscosity may increase.

Oxygen transport may change.

Cobalt Octoate 6% can help accelerate the chemical component of the drying process, but it does not eliminate the influence of environmental conditions.

Cobalt Octoate 6% and Humidity

Particularly in exterior applications, relative humidity and substrate temperature can influence drying behavior.

Real-world application should consider:

Air temperature

Substrate temperature

Relative humidity

Dew point

Film thickness

Applied quantity

Can Cobalt Octoate 6% Be Used in Water-Based Paint?

A standard solvent-based Cobalt Octoate 6% grade should not automatically be assumed to be suitable for a water-based system.

In water-based applications, the following should be evaluated:

Water compatibility

Emulsion stability

VOC contribution

Phase separation

pH

Film appearance

Drying

Special water-compatible drier technologies may require a different technical solution.

Cobalt Octoate 6% Safe Handling

Cobalt Octoate 6% is an industrial chemical raw material and should be handled by trained personnel using appropriate workplace controls.

The safety evaluation should consider both the cobalt-containing component and the carrier system used in the commercial product.

During handling, suitable:

Protective gloves

Safety goggles

Protective clothing

Adequate ventilation

should be used.

Exact personal protective equipment and workplace controls should be established according to the current SDS for the specific product.

In polyester systems, particular care is required because concentrated Cobalt Octoate and organic peroxide initiators such as MEKP should not be allowed to come into direct concentrated contact.

Cobalt Octoate 6% Storage

The product should be stored under suitable chemical storage conditions.

Containers should remain:

Closed

Intact

Properly labeled

Protected from unsuitable heat sources

The storage area should be adequately ventilated and the specified storage requirements on the applicable SDS should be followed.

During extended storage, monitor for:

Sedimentation

Cloudiness

Phase separation

Crystallization

Unusual color changes

Is Cobalt Octoate 6% Used in Food Applications?

Standard Cobalt Octoate 6% is an industrial raw material intended primarily for applications such as paints, coatings, inks and resin systems.

Use in food-contact applications would require independent evaluation of:

Purity

Carrier system

Migration

Regulatory requirements

Specific application suitability

Therefore, standard industrial Cobalt Octoate 6% should not automatically be described as a food-grade product.

Can Cobalt Octoate 6% Be Used in Cosmetics?

Cobalt Octoate 6% is primarily an industrial metal drier.

For cosmetic applications, the following should be evaluated separately:

INCI identity

Purity

Complete product composition

Regulatory status

Safety profile

The ingredient designation associated with the active substance is:

COBALT BIS(2-ETHYLHEXANOATE)

An ingredient name alone does not establish suitability for cosmetic use.

Can Cobalt Octoate 6% Be Used in Water Treatment?

Cobalt Octoate 6% is not a conventional general-purpose water-treatment chemical.

Its main technical role is associated with cobalt-based catalytic activity in oxidative-curing systems.

Any specialized water-related use would require specific technical validation and consideration of the intended application, environmental exposure and regulatory requirements.

Can Cobalt Octoate 6% Be Used in Agriculture?

Cobalt Octoate 6% is not a conventional crop-protection active ingredient.

It should not automatically be positioned as a herbicide, fungicide, pesticide or plant-growth regulator.

Any specialized agricultural formulation should be evaluated according to:

Intended function

Exposure route

Formulation chemistry

Regulatory requirements

Concentration

Technical suitability

Cobalt Octoate 6% Quality Control

Depending on the application, incoming quality control may include:

Metallic Co %

Appearance

Color

Density

Viscosity

Total solids

Carrier solvent

Water

Clarity

Sediment

Storage stability

One of the most important parameters is the actual metallic cobalt concentration.

Cobalt Octoate 6% TDS, SDS and COA

TDS provides technical specifications and typical product properties.

SDS provides safety, handling, storage, transport and hazard information.

COA provides the analytical results for a specific batch.

For example, a product may have a nominal cobalt content of approximately 6%, while the actual batch result may be slightly above or below that nominal value.

For precision dosing, the actual batch result can therefore be relevant.

What Should Be Considered When Buying Cobalt Octoate 6%?

When purchasing Cobalt Octoate 6%, consider:

Product name

CAS No.

EC No.

Metallic Co %

Carrier solvent

Density

Viscosity

Total solids

Color

Flash point

Packaging

Shelf life

TDS

SDS

COA

Lead time

Supply conditions

Looking only at the price per kilogram may not provide an accurate picture of the actual formulation cost.

What Affects Cobalt Octoate 6% Price?

Cobalt Octoate 6% pricing may vary according to:

Metal concentration

Product grade

Carrier solvent

Order quantity

Packaging

Logistics

Delivery terms

Supply conditions

The actual cost should also be evaluated in relation to the dosage required to achieve the target metallic cobalt level.

Can Cobalt Octoate 6% Be Purchased in Bulk?

Bulk purchasing can be planned according to:

Required quantity

Monthly consumption

Annual consumption

Packaging

Delivery point

Application

Technical documentation requirements

Providing these details can help establish the most appropriate commercial supply structure.

Common Formulation Mistakes with Cobalt Octoate 6%

Common mistakes include:

Treating pure active Cobalt bis(2-ethylhexanoate) and the 6% commercial solution as the same product

Interpreting 6% as the percentage of total active product rather than metallic cobalt content

Purchasing without confirming the CAS number

Automatically treating Cobalt Naphthenate as an identical substitute

Assuming Zirconium and Cobalt perform exactly the same function

Ignoring the difference between surface dry and through-dry

Assuming more cobalt will always produce better results

Ignoring pigment effects

Ignoring film thickness

Failing to review the COA

Selecting the product without understanding the carrier solvent

Using a standard solvent-based grade in a water-based system without testing

Directly mixing concentrated cobalt promoter with MEKP

These errors can negatively affect both formulation performance and production safety.

When Is Technical Support Needed for Cobalt Octoate 6%?

Cobalt Octoate 6% should not be selected on price alone in situations such as:

Replacing an existing cobalt drier

Changing from Cobalt Naphthenate

Comparing Cobalt Neodecanoate

Moving to a water-based formulation

Introducing a new alkyd resin

Developing transparent or very light-colored products

Formulating high-film-thickness coatings

Developing low-temperature applications

Working with high pigment loading

Optimizing polyester promoter performance

Changing an MEKP curing system

Reducing VOC

In these cases, actual formulation performance should be established through controlled testing.

Frequently Asked Questions About Cobalt Octoate 6%

What is Cobalt Octoate 6%?

Cobalt Octoate 6% is a cobalt-based metal drier containing approximately 6% metallic cobalt and used primarily in oxidative-curing paints, coatings, varnishes, inks and suitable resin systems.

What is Cobalt Octoate 6% used for?

It is mainly used to accelerate oxidative curing and particularly to support shorter surface-drying and tack-free times.

Is Cobalt Octoate 6% a paint drier?

Yes. It is commonly used as a primary or surface drier in suitable alkyd and other oxidative-curing coating systems.

What is the CAS number of Cobalt Octoate 6%?

The CAS number associated with Cobalt bis(2-ethylhexanoate) is 136-52-7.

What is the EC number of Cobalt Octoate 6%?

The EC / EINECS number is 205-250-6.

What is the INCI name of Cobalt Octoate?

The ingredient name associated with the active substance is COBALT BIS(2-ETHYLHEXANOATE).

What is the molecular formula of Cobalt Octoate?

The molecular formula of the pure active compound is C16H30CoO4.

What is the molecular weight of Cobalt Octoate?

The molecular weight of pure Cobalt bis(2-ethylhexanoate) is approximately 345.34 g/mol.

Is Cobalt Octoate 6% a pure substance?

No. The 6% commercial grade is generally a formulated product containing approximately 6% metallic cobalt rather than 100% pure active compound.

Why is it called Cobalt Octoate 6%?

The “6%” designation generally refers to approximately 6% metallic cobalt in the commercial product.

What is the melting point of Cobalt Octoate?

For the pure active compound, melting behavior may occur around 53–58 °C under certain conditions, while different analytical conditions may show melting with decomposition in a higher range.

What is the boiling point of Cobalt Octoate?

The pure active compound may decompose around 90 °C rather than exhibiting a simple conventional boiling point.

Commercial 6% solution behavior depends on the carrier solvent.

Is Cobalt Octoate 6% a liquid?

Commercial Cobalt Octoate 6% grades are generally supplied in liquid form.

What color is Cobalt Octoate 6%?

It is typically found in purple, violet, blue-violet or dark-violet shades.

What is the density of Cobalt Octoate 6%?

Density depends on the commercial grade and carrier solvent, so the exact value should be checked in the relevant technical specification.

What is the viscosity of Cobalt Octoate 6%?

Viscosity depends on grade, carrier system and temperature and should be confirmed from the applicable technical specification.

Is Cobalt Octoate 6% soluble in water?

A standard solvent-based commercial grade should not automatically be considered water-compatible. Actual formulation testing is required for water-based applications.

Which paints use Cobalt Octoate 6%?

It can be used in suitable alkyd paints, air-drying enamels, industrial coatings, maintenance coatings, wood coatings and other oxidative-curing paint systems.

Is Cobalt Octoate 6% used in varnishes?

Yes. It can be evaluated as a surface-drying accelerator in suitable oxidative-curing varnishes.

Is Cobalt Octoate 6% used in printing inks?

Yes. It can be evaluated in oxidatively drying oil-based printing ink systems.

Is Cobalt Octoate 6% used in polyester resin?

Yes. In suitable unsaturated polyester and vinyl ester systems it can be evaluated as a promoter or curing accelerator.

Can Cobalt Octoate 6% be used with MEKP?

It can be part of a suitable polyester curing system, but concentrated Cobalt Octoate and concentrated MEKP should not be mixed directly together.

Is Cobalt Octoate 6% the same as Cobalt Naphthenate?

No. They belong to related cobalt carboxylate drier technologies, but their chemical structures and practical properties differ.

Is Cobalt Octoate 6% the same as Zirconium Octoate?

No. Cobalt is primarily associated with surface drying, while Zirconium is generally used to support deeper cure and overall film development.

Is Cobalt Octoate 6% the same as Calcium Octoate?

No. Calcium is generally considered an auxiliary drier, while cobalt has much stronger primary surface-drying activity.

Is Cobalt Octoate 6% the same as Manganese Drier?

No. The metal center and resulting drying profile are different.

Is Cobalt Octoate 6% the same as Cobalt Neodecanoate?

No. Both are cobalt-based drier systems, but their ligand structures and practical properties differ.

What happens if too much Cobalt Octoate 6% is used?

Potential effects include excessively fast surface drying, wrinkling, internal cure imbalance, solvent trapping and changes in color or gloss.

What happens if too little Cobalt Octoate 6% is used?

Surface drying and tack-free time may become longer.

What dosage of Cobalt Octoate 6% should be used?

There is no universal dosage. It should be calculated according to the target metallic cobalt concentration and validated through actual formulation testing.

What can be used instead of Cobalt Octoate 6%?

Depending on the formulation, Cobalt Naphthenate, Cobalt Neodecanoate, Manganese driers or other metal-drier systems may be evaluated. They should not automatically be regarded as one-to-one equivalents.

Can Cobalt Octoate 6% be used in white paint?

It may be used, but the characteristic color of cobalt driers should be considered during formulation and dosage optimization.

Can Cobalt Octoate 6% be used in transparent varnishes?

It may be used, but clarity, color, gloss and haze should be monitored carefully.

Can Cobalt Octoate 6% be used in water-based paint?

A standard solvent-based grade should not automatically be considered suitable for water-based systems.

Which physical properties are important when selecting Cobalt Octoate 6%?

Metal Co %, density, viscosity, solvent type, total solids, color, flash point and storage stability are among the key parameters.

Which documents are important for Cobalt Octoate 6%?

The main technical documents may include TDS, SDS and COA.

Why is the COA important for Cobalt Octoate 6%?

It provides the actual analytical results for the specific batch, including the measured metallic cobalt content where applicable.

What affects Cobalt Octoate 6% price?

Price may vary with metallic cobalt concentration, product grade, carrier solvent, order volume, packaging and logistics.

Can Cobalt Octoate 6% be purchased in bulk?

Yes. Bulk supply can be planned according to required quantity, packaging and delivery conditions.

Is Cobalt Octoate 6% suitable for my production process?

It is particularly relevant to solvent-based oxidative alkyd systems and can also be evaluated in suitable polyester and vinyl ester curing systems. Other applications require grade-specific compatibility testing.

Technical Summary of Cobalt Octoate 6%

Product Name: Cobalt Octoate 6%

Chemical Name: Cobalt bis(2-ethylhexanoate)

Common Chemical Name: Cobalt(II) 2-Ethylhexanoate

Commercial Name: Cobalt Octoate 6%

INCI Name: COBALT BIS(2-ETHYLHEXANOATE)

CAS No: 136-52-7

EC / EINECS No: 205-250-6

Molecular Formula: C16H30CoO4

Molecular Weight: 345.34 g/mol

Chemical Class: Metal Carboxylate / Metal Soap

Approximate Metallic Cobalt Content: 6%

Main Function: Primary / Surface Drier

Additional Functions: Oxidation Catalyst, Curing Accelerator, Polyester Promoter

Main Applications: Alkyd Paints, Varnishes, Industrial Coatings, Wood Coatings, Wood Stains, Oil-Based Printing Inks, Alkyd Resins, Unsaturated Polyester Systems and Vinyl Ester Systems

Physical Form: Commercial grades are generally supplied as liquid drier solutions

Typical Color: Purple, Violet, Blue-Violet or Dark Violet

Melting Behavior of Pure Active Compound: Approximately 53–58 °C under certain test conditions; alternative measurement conditions may show melting with decomposition at higher temperatures

Boiling Behavior of Pure Active Compound: Decomposition may occur around 90 °C rather than conventional boiling

Main Technical Role: Accelerating oxidative surface drying

For formulation selection, the resin, metallic cobalt concentration, pigment package, solvent system, film thickness, temperature, humidity, oxygen availability and complementary driers should be evaluated together.

Cobalt Octoate 6% Supply from Ataman Kimya

Ataman Kimya supplies Cobalt Octoate 6% for industrial formulation requirements involving paints, coatings, varnishes, printing inks, alkyd resins and suitable curing systems.

When sourcing Cobalt Octoate 6%, the product should be evaluated according to its chemical identity, metallic cobalt concentration, carrier system, physical properties, required documentation and intended application.

For an accurate quotation and supply evaluation, customers can provide:

Product: Cobalt Octoate 6%

CAS No: 136-52-7

Application: Paint, coating, varnish, ink, alkyd resin, polyester or other intended use

Required Quantity: Laboratory, pilot, commercial or bulk quantity

Current Drier System: Existing cobalt or auxiliary drier, where applicable

Target Metallic Cobalt Level: Where applicable

Packaging Requirement: As required

Documentation: TDS, SDS, COA or other technical requirements

Sharing the intended application and formulation requirements helps Ataman Kimya evaluate the product according to the actual technical and commercial need.

Request a Cobalt Octoate 6% Quotation from Ataman Kimya

If you are looking for Cobalt Octoate 6%, Cobalt 2-Ethylhexanoate, Cobalt Drier, Cobalt Surface Drier, Cobalt Primary Drier or Cobalt Octoate 6% for alkyd paint and coatings, Ataman Kimya can support your sourcing requirement.

Provide your application, required quantity and technical specifications to receive information about Cobalt Octoate 6% availability, pricing, documentation, packaging and supply conditions.

Ataman Kimya provides a direct point of contact for industrial customers seeking Cobalt Octoate 6% and related chemical raw material solutions.