DIISOTRIDECYL ADIPATE

Diisotridecyl Adipate, also known as DITA or DTDA, is an aliphatic diester with CAS number 26401-35-4 and the representative molecular formula C32H62O4, used in synthetic lubricants, technical greases and plasticized polymers. This adipate is selected for its lubricity, low-temperature fluidity and contribution to the viscosity characteristics of functional fluids. Its ester groups provide polarity while its branched hydrocarbon chains contribute oil compatibility and, in compatible polymers, allow the molecules to act as an external plasticizer.

CAS No: 26401-35-4
EC No: 247-660-8
Molecular formula: C32H62O4
Molecular weight: approximately 510.84 g/mol
Appearance: clear, colorless to pale yellow liquid, depending on grade
Chemical class: saturated aliphatic dicarboxylic acid ester
Water solubility: practically insoluble
Kinematic viscosity at 40°C: approximately 23.5-29.5 mm²/s in a representative commercial grade
Pour point: a representative commercial grade specifies ≤ -42°C
Flash point: a representative commercial grade specifies ≥ 220°C

WHAT IS DIISOTRIDECYL ADIPATE?

Diisotridecyl Adipate is a synthetic adipic acid ester used as a lubricant base fluid, a lubricant component and a plasticizer, particularly for PVC. DITA, CAS 26401-35-4, combines two ester linkages with long, branched alcohol-derived chains and is supplied commercially as a liquid.

In lubrication, DTDA can form part of the main base-fluid system or serve as a polar co-base stock in a hydrocarbon formulation. Its contribution must be evaluated together with viscosity, additive solubility, seal compatibility and the operating temperature range.

Industrial production involves esterification of adipic acid with isotridecyl alcohol. Formation of the diester releases water, while finishing operations control residual acidity, moisture and unreacted alcohol. The production route does not establish a renewable origin, a specific biodegradation result or an application approval by itself.

Commercial isotridecyl alcohol can contain a distribution of branched structures. Consequently, an idealized molecular drawing does not fully describe every grade sold under this substance identity. Differences in alcohol feedstock, finishing and specification can change low-temperature behavior and viscosity.

Diisodecyl adipate is a different adipate based on a shorter alcohol fraction. DITA should also be distinguished from diisotridecyl phthalate and from adipic acid itself. These names do not identify interchangeable materials.

COMMON PRODUCT & CHEMICAL NAMES OF DIISOTRIDECYL ADIPATE:

Diisotridecyl adipate
Di-isotridecyl adipate
Hexanedioic acid, diisotridecyl ester
Hexanedioic acid, 1,6-diisotridecyl ester
DITA
DTDA

DITA and DTDA are abbreviations used for this ester. Commercial names include BergaLub DITA, CEREPLAS DTDA and DEHYLUB 1337. A commercial designation identifies a supplier's product and specification, rather than a separate chemical identity or a universal quality level.

Bis(11-methyldodecyl) adipate and bis(11-methyldodecyl) hexanedioate also appear in substance identification records. These structural names should not be interpreted as proof that every industrial grade consists exclusively of that single branching pattern.

CAS NO, EC / EINECS NO AND CHEMICAL IDENTIFICATION OF DIISOTRIDECYL ADIPATE

Product name: Diisotridecyl Adipate
Common abbreviations: DITA, DTDA
Chemical name: hexanedioic acid, diisotridecyl ester
CAS No: 26401-35-4
EC / EINECS No: 247-660-8
Representative molecular formula: C32H62O4
Representative molecular weight: approximately 510.84 g/mol
Chemical class: saturated branched-chain adipate diester
Main functions: lubricant base ester, polar co-base fluid and polymer plasticizer

The identifiers establish substance identity, while the purchase specification establishes the required material quality. They do not certify suitability for medical devices, food contact or a finished lubricant standard. REACH registration information exists for this substance, but registration coverage for a particular supply chain and use requires separate confirmation.

CHEMICAL STRUCTURE AND MOLECULAR PROPERTIES OF DIISOTRIDECYL ADIPATE

A representative structure can be written as R-O-C(=O)-(CH2)4-C(=O)-O-R, where R represents an isotridecyl group. The idealized molecule contains two ester groups and two branched C13 hydrocarbon groups. It is an organic ester, rather than a polymer, an ionic surfactant or a free carboxylic acid.

The ester oxygen atoms introduce polarity into an otherwise hydrocarbon-rich structure. This combination helps explain why DITA can be useful in oil-based formulations while remaining practically insoluble in water. Branching also influences packing and low-temperature flow, although the final result depends on the actual alcohol distribution and product quality.

HOW DOES DIISOTRIDECYL ADIPATE WORK AT THE MOLECULAR LEVEL?

In a lubricating blend, the polar ester groups can contribute affinity for metal surfaces and improve the solvency balance relative to a purely hydrocarbon base fluid. The resulting formulation may benefit from improved lubricity or additive compatibility. These effects do not replace the need for a suitable antiwear or extreme-pressure package where the application requires one.

In a compatible polymer, DTDA molecules enter the polymer matrix and modify interactions between chains. Greater chain mobility can improve flexibility and processing behavior. Because this is external plasticization, migration and extraction must be evaluated instead of assuming permanent incorporation into the polymer backbone.

Relevant functions include:

Contributing to lubricating-film formation
Adjusting base-fluid viscosity and low-temperature behavior
Supporting dissolution of compatible polar additives
Improving flexibility in compatible plastic compounds

Concentration, base-oil chemistry, polymer type, additive selection and exposure to water or heat all affect the result. A high viscosity index describes viscosity-temperature behavior, rather than proving oxidation resistance or an equipment service-life claim.

PHYSICAL AND CHEMICAL PROPERTIES OF DIISOTRIDECYL ADIPATE

The following figures illustrate commercial specifications and typical data. They are not a single universal specification for all DTDA products.

Physical form: clear liquid
Density at 20°C: approximately 0.909-0.914 g/cm³ in a representative grade
Kinematic viscosity at 40°C: one grade specifies 25-28 mm²/s
Kinematic viscosity at 100°C: approximately 5.3 mm²/s in the same technical dataset
Pour point: approximately -57°C in that dataset
Flash point: above 200°C by the Cleveland open-cup method in that dataset
Ester content: one commercial specification requires at least 99% by weight
Water content: the same specification permits up to 0.1% by weight
Free alcohol: the same specification permits up to 0.1% by weight
Acid value: the same specification permits up to 0.1 mg KOH/g

Other commercial grades specify viscosity at 40°C of 23.5-29.5 mm²/s, pour point ≤ -42°C and flash point ≥ 220°C. These figures describe another supplier's grade and should not be merged into a guaranteed combined specification.

Viscosity must always be associated with its measurement temperature. A value measured at 40°C cannot be substituted for the value at 100°C, and the finished blend viscosity should be measured rather than calculated by a simple arithmetic average.

Pour point is a flow-test result, not a universal freezing temperature or the lowest permissible machine start-up temperature. Likewise, flash point indicates behavior under a specified test and is not a continuous operating-temperature limit.

Low acid value, low residual alcohol and controlled water content indicate effective finishing. Moisture and acidity matter because ester-containing systems can undergo hydrolysis under unfavorable conditions. Values for boiling temperature, pH and purity should not be copied from unrelated grades or presented as measured results when they are estimates.

USE OF DIISOTRIDECYL ADIPATE IN LUBRICANT BASE-FLUID SYSTEMS

DTDA can be evaluated with polyalphaolefins or other compatible hydrocarbon oils when a formulation needs an ester contribution. Selecting the proportion requires testing the complete composition, particularly its additive solvency, elastomer response and viscosity at the intended temperatures.

An adipate base ester is not a finished hydraulic, compressor or gear oil. Equipment suitability also depends on antiwear performance, oxidation control, air release, foaming, corrosion protection and other requirements specific to the machine. Changing the ester proportion can alter several of these properties simultaneously.

SECTORS AND INDUSTRIAL APPLICATIONS OF DIISOTRIDECYL ADIPATE

Main areas of use:

Synthetic industrial lubricants
Hydraulic-fluid development
Technical greases
Plasticized PVC and other compatible polymer compounds
Functional-fluid and additive-solvency studies

DIISOTRIDECYL ADIPATE IN INDUSTRIAL LUBRICANTS

Purpose: introduce an ester base-fluid contribution to lubricity, fluidity and formulation solvency.
Function of DITA: base stock or co-base stock, depending on composition.
Performance effect: can help balance low-temperature behavior and additive compatibility.
Limitations: finished-fluid testing and equipment requirements determine suitability.

DIISOTRIDECYL ADIPATE IN TECHNICAL GREASES

Purpose: modify the liquid phase of the grease.
Function of DTDA: ester component within the base-oil blend.
Performance effect: can contribute lubricity and influence viscosity-temperature behavior.
Limitations: thickener compatibility, oil separation, consistency and seal response must be evaluated.

DIISOTRIDECYL ADIPATE AS A POLYMER PLASTICIZER

Purpose: improve flexibility in compatible plastic compounds, particularly PVC.
Function of DITA: external plasticizer.
Performance effect: modifies polymer-chain mobility and can support low-temperature flexibility.
Limitations: compatibility, migration, extraction and aging behavior depend on the complete compound.

DIISOTRIDECYL ADIPATE AND ENVIRONMENTAL PERFORMANCE

Biodegradation claims require the exact grade, test method and result. Commercial descriptions differ, and one technical document notes borderline performance in OECD 301B testing and the use of blends with more biodegradable esters. Therefore, all DTDA grades cannot be described as readily biodegradable on the basis of the chemical name alone.

A formulation containing this adipate does not automatically qualify for an environmental label. Renewable content, biodegradation, aquatic toxicity and final-product certification are separate questions. The absence of a phthalate structure also does not establish harmlessness or universal regulatory compliance.

WHICH PROBLEMS CAN DIISOTRIDECYL ADIPATE HELP SOLVE?

Insufficient polarity in a hydrocarbon base-fluid system: an ester fraction can help adjust solvency for compatible additives, subject to stability testing.

Poor cold-flow balance: a suitable DITA grade may contribute to low-temperature fluidity, but the blend must be tested at the actual starting conditions.

Excessive rigidity in compatible plastics: external plasticization can increase flexibility, while migration and mechanical-property retention remain important.

An unsuitable viscosity balance in a grease or oil: DTDA provides another base-fluid option, although it does not replace a full viscosity and performance study.

THINGS TO CONSIDER WHEN USING DIISOTRIDECYL ADIPATE

The main purchasing mistake is treating all products carrying the same CAS number as technically equivalent. Establish the required viscosity, acid value, water limit and application before comparing offers.

Confirm the actual grade and alcohol-derived composition.
Measure blend viscosity at the required temperatures.
Evaluate additive solubility after storage and temperature cycling.
Check elastomer swelling, hardness and mechanical changes.
Assess hydrolytic and oxidation stability in the complete system.
Distinguish polymer plasticization from permanent chemical modification.
Support environmental claims with grade-specific test results.

Prevent mist formation and avoid repeated skin exposure during handling. A high flash point does not remove hot-liquid burns, combustible-liquid hazards or the slipping hazard from spills.

INITIAL FORMULATION APPROACHES FOR DIISOTRIDECYL ADIPATE

The two compositions below are proposed laboratory screening blends based on the established use of DITA as an ester co-base fluid. They are not published, validated commercial recipes and do not prescribe a universal use level. Percentages are by weight of the complete test blend, using raw materials as supplied.

EXAMPLE 1: DIISOTRIDECYL ADIPATE IN A PAO BASE-FLUID SCREEN

Components:

Diisotridecyl Adipate: 10.00%
Polyalphaolefin base oil of a selected viscosity: 90.00%
Total: 100.00%

Use this unadditized blend to compare ester incorporation against the same PAO without DITA. The selected PAO viscosity must be stated in the laboratory record, and no ISO viscosity grade is assigned to the blend in advance.

Evaluation criteria:

Clarity and phase stability
Kinematic viscosity at 40°C and 100°C
Low-temperature viscosity and flow
Elastomer compatibility
Solubility screening with the intended additive package in a separate development stage

This blend is not ready for equipment service, and the complete fluid needs application-specific additives and validation.

EXAMPLE 2: DIISOTRIDECYL ADIPATE IN A MINERAL-OIL BASE-FLUID SCREEN

Components:

Diisotridecyl Adipate: 5.00%
Hydrotreated mineral base oil of a selected viscosity: 95.00%
Total: 100.00%

This second trial compares an ester-containing hydrocarbon base blend with the corresponding mineral oil. The 5% level is a proposed screening point, rather than a proven optimum or a minimum effective concentration.

Evaluation criteria:

Miscibility and storage appearance
Viscosity-temperature behavior
Seal-material response
Water separation and foaming behavior during subsequent formulation development
Oxidation response after selecting a compatible antioxidant system

Neither example establishes environmental certification, food-contact status or medical suitability. Any later addition of an additive package requires rebalancing the percentages to 100% and repeating relevant tests.

DIISOTRIDECYL ADIPATE SIMILAR PRODUCTS AND ALTERNATIVES

An alternative should be compared by viscosity, cold flow, polarity, volatility, hydrolytic behavior and material compatibility. Equal mass substitution does not guarantee equal performance.

DIISOTRIDECYL ADIPATE AND DIISODECYL ADIPATE

Both are adipate diesters, but they use different alcohol fractions. Commercial diisodecyl adipate grades commonly have lower viscosity than DTDA grades, making direct substitution unsuitable without reformulation.

DIISOTRIDECYL ADIPATE AND DI(2-ETHYLHEXYL) SEBACATE

The sebacate is another synthetic diester with a different acid and alcohol structure. It offers another low-temperature base-fluid option, with different viscosity and formulation behavior.

DIISOTRIDECYL ADIPATE AND POLYALPHAOLEFINS

PAOs are hydrocarbon base fluids, while DITA contains polar ester groups. The two can play complementary roles, particularly when additive solvency and seal behavior require adjustment.

DIISOTRIDECYL ADIPATE AND OTHER PLASTICIZERS

Plasticizer selection for PVC requires compound-specific comparisons of flexibility, processing, migration and extraction. A non-phthalate structure alone does not identify the best replacement for every application.

QUALITY CONTROL AND PURCHASING CRITERIA FOR DIISOTRIDECYL ADIPATE

Before purchasing, define whether the material will be a lubricant base ester, a grease component or a polymer plasticizer. A price comparison becomes meaningful only after the required quality has been established.

Information to clarify and review before purchasing:

CAS 26401-35-4 and EC 247-660-8 identity
Viscosity specification and test temperatures
Acid value, moisture and residual alcohol limits
Ester content and the analytical method
Color, appearance and odor requirements
Flash-point and pour-point test methods
Grade-specific biodegradation evidence when required
Current safety documentation for the destination country
Supply-chain REACH coverage where applicable
Batch traceability, packaging and delivery conditions

A COA reports batch results, a TDS describes technical characteristics and an SDS communicates safety and handling information. They serve different purposes. For required limits or missing grade-specific information, please contact Ataman Kimya.

Cost varies with specification, quantity, packaging, logistics and documentation requirements. Low price does not compensate for an unsuitable viscosity range or an unsupported application claim.

STORAGE AND HANDLING OF DIISOTRIDECYL ADIPATE

Keep the ester in tightly closed, clearly identified containers, protected from water ingress, contamination and excessive heat. Store away from strong oxidizing agents and use clean transfer equipment. Specific storage temperatures and shelf life should be obtained for the offered grade from Ataman Kimya.

Contain leaks and absorb spills with a suitable inert material. Prevent entry into drains and waterways, and collect residues for disposal through the appropriate waste route. The oily film can make floors dangerously slippery.

Some supplier documentation describes particular DTDA grades as not regulated as dangerous goods for road, sea and air transport. That statement should not be transferred automatically to every grade or blend, especially where environmental classification differs. Obtain the current transport determination for the supplied product from Ataman Kimya rather than assigning a universal UN number.

SAFETY INFORMATION OF DIISOTRIDECYL ADIPATE

Available supplier documents do not support one blanket hazard statement for all supplies. A reviewed US grade is not classified as hazardous under its stated HazCom framework, while some European formulation documentation lists the substance with Aquatic Chronic 2, H411, meaning toxic to aquatic life with long lasting effects. These records should not be presented as a single harmonized classification for every product.

The applicable classification and label must therefore be confirmed for the exact grade and destination. No claim of being universally nontoxic, harmless to the environment or free of handling precautions is justified.

Use suitable chemical-resistant gloves, eye protection and ventilation appropriate to the operation. Avoid breathing oil mist and prevent contact with hot fluid. After skin contact, wash with soap and water, and after eye contact rinse thoroughly with clean water. Seek medical advice for persistent irritation or significant exposure, and do not induce vomiting after ingestion.

The organic liquid can burn when sufficiently heated, with hazardous combustion products including carbon oxides. Keep ignition sources away from heated handling operations and use firefighting measures appropriate to the surrounding conditions. Prevent releases to soil and water, regardless of any biodegradation claim.

SUPPLY OF DIISOTRIDECYL ADIPATE FROM ATAMAN KIMYA

ATAMAN KİMYA can be contacted for Diisotridecyl Adipate supply inquiries and selection of a suitable industrial grade. Availability, packaging, technical limits and application documentation must be confirmed for the offered product.

Sharing the following information in a quotation request helps evaluate the correct Diisotridecyl Adipate product:

Intended application and current formulation type
Required viscosity and operating-temperature range
Acid value and moisture limits
Required environmental or regulatory documentation
Trial quantity, commercial quantity and preferred packaging
Delivery destination and schedule

FREQUENTLY ASKED QUESTIONS ABOUT DIISOTRIDECYL ADIPATE

What is Diisotridecyl Adipate?
It is a synthetic adipate diester used as a lubricant base ester, a co-base fluid and a plasticizer.

What is its CAS number?
The CAS number is 26401-35-4.

What is its EC number?
The EC / EINECS number is 247-660-8.

What is the molecular formula?
The representative formula is C32H62O4, with a molecular weight of approximately 510.84 g/mol.

Are DITA and DTDA the same chemical?
Both abbreviations are used for Diisotridecyl Adipate, but the supplier's grade still needs confirmation.

Is it the same as diisodecyl adipate?
No, the alcohol-derived groups differ, and their commercial viscosity profiles can differ substantially.

Does it dissolve in water?
It is practically insoluble in water and is normally evaluated in oil-based or compatible polymer systems.

Why is it used with PAO?
The ester can adjust the polarity and solvency balance of a hydrocarbon formulation, subject to compatibility testing.

Can it be used in technical greases?
Yes, it can form part of the base-oil phase, with the thickener system and finished grease tested separately.

Can it plasticize PVC?
It is commercially used as a PVC plasticizer, with performance depending on the complete compound.

Is its viscosity always the same?
No, grade and measurement temperature matter, so numerical results must be compared on the same basis.

Does pour point specify the lowest operating temperature?
No, low-temperature viscosity, pumpability and equipment requirements must also be considered.

Is every grade readily biodegradable?
No, the claim needs a grade-specific test result and cannot be inferred from the substance name.

Does phthalate-free mean approved for every application?
No, chemical structure does not establish food-contact, medical or other application approval.

Is it a finished hydraulic oil?
No, the ester is a formulation raw material and does not independently meet every requirement of a finished fluid.

What is the recommended dosage?
There is no universal dosage, and the proportion depends on the base oils, polymer or grease system and target performance.

Does it have a universal UN number?
No single transport assignment should be assumed across all grades and blends, so obtain the current determination for the offered product.

Which documents are important when buying it?
Request the batch COA, relevant technical specification and current SDS, together with any application-specific evidence.

DIISOTRIDECYL ADIPATE - TECHNICAL SUMMARY

Diisotridecyl Adipate, DITA or DTDA, is a saturated aliphatic diester derived from adipic acid and isotridecyl alcohol. It combines ester polarity with long, branched hydrocarbon groups and is supplied as a liquid for industrial formulation.

Commercial grades differ in viscosity, acid value, moisture, residual alcohol and low-temperature properties. Representative formula C32H62O4 and molecular weight approximately 510.84 g/mol describe the idealized C13 diester and do not replace a commercial specification.

CAS 26401-35-4 and EC 247-660-8 identify this adipate. It should not be confused with diisodecyl adipate, diisotridecyl phthalate or an already formulated lubricant.

Main applications include synthetic lubricant base-fluid systems, technical greases and compatible plasticized polymers, particularly PVC. Blend development requires testing of viscosity, additive compatibility, seals, cold flow and the complete application's performance requirements.

Environmental claims and hazard classification require product-specific confirmation. Biodegradability, aquatic effects, renewable content and regulatory approvals are distinct issues, and industrial-grade material should not be assigned unsupported medical or food-use claims.

Diisotridecyl Adipate can be sourced from ATAMAN KİMYA. For further information and supply inquiries about Diisotridecyl Adipate, please contact ATAMAN KİMYA.