DIOCTYL ADIPATE (DOA)

Dioctyl adipate (DOA) is an ester-based formulation raw material, identified in this article as the linear adipate with CAS 123-79-5 and molecular formula C22H42O4, for compatible plastic compounds and qualified specialty uses. It is considered when a formulation needs a different balance of softness, manufacturing behavior and retained properties. By distributing between compatible polymer chains, the ester permits greater chain movement, while its concentration and the surrounding formulation determine the practical effect.

CAS No: 123-79-5
EC No: 204-652-9
Molecular formula: C22H42O4
Molecular weight: approximately 370.57 g/mol
Chemical family: saturated aliphatic diester
Appearance: clear, colorless liquid in an evaluated specification
Texture: oily liquid
Water solubility: practically insoluble
Ethanol solubility: soluble
Specific gravity at 20°C: approximately 0.924-0.930 in a documented specification

WHAT IS DIOCTYL ADIPATE (DOA)?

Dioctyl adipate (DOA) is an adipic acid diester that can serve as an external plasticizer in compatible resins. The substance described here is the n-octyl ester, CAS 123-79-5, also named dioctyl hexanedioate.

Understanding the supplied material begins with its alcohol component. Two linear octyl groups distinguish this ester from the product made with branched 2-ethylhexanol. The latter is bis(2-ethylhexyl) adipate, CAS 103-23-1, which also carries the commercial abbreviation DOA.

For the linear material, esterification uses adipic acid and n-octanol. Subsequent finishing determines the residual acid, water, alcohol and color characteristics offered to the buyer. A trade description is therefore only the starting point, the structure and product specification complete the identification.

Different supply categories include polymer-formulation material, neat analytical chemicals and reference solutions. Specialist sensory grades are also available for their stated applications. Assay, solvent content and use restrictions must be reviewed separately for each category.

COMMON PRODUCT & CHEMICAL NAMES OF DIOCTYL ADIPATE (DOA)

Dioctyl adipate, di-n-octyl adipate, adipic acid dioctyl ester, dioctyl hexanedioate, adipic acid bis-n-octyl ester, hexanedioic acid dioctyl ester.

Use DOA together with CAS 123-79-5 whenever this linear structure is intended. DEHA identifies the branched adipate in the comparison above and should not be inserted into the synonym list for this product. A similar-sounding phthalate name also denotes a different chemical structure.

DIOCTYL ADIPATE (DOA) IDENTIFICATION DETAILS

Declared product: Dioctyl adipate (DOA)
Structural description: adipic acid diester of n-octanol
CAS identity: 123-79-5
EC / EINECS identity: 204-652-9
Formula: C22H42O4
Molar mass: approximately 370.57 g/mol
Documented flavoring identifiers: FEMA 4476 and JECFA 1968

The branched and linear adipates share their formula and molar mass. Identification consequently needs more than these two numbers. Match the CAS entry with the structural name and the supplier's identity evidence before approving substitution or accepting a batch.

FEMA and JECFA identifiers are not E numbers or blanket permissions. They refer to a specialist record, while industrial purchasing requires a specification for the offered product. No INCI identity is inferred solely from the words dioctyl adipate.

STRUCTURAL FEATURES OF DIOCTYL ADIPATE (DOA)

Two ester connections link the adipic acid unit to straight C8 chains. A condensed representation is CH3(CH2)7-O-C(=O)-(CH2)4-C(=O)-O-(CH2)7CH3. The structure is aliphatic and contains no aromatic phthalate ring.

The oxygen-containing ester sites give polarity within a largely hydrocarbon molecule. This permits interaction with suitable organic ingredients without making the liquid freely water soluble. Changing the branching of its alkyl groups can alter physical behavior without changing the elemental formula.

HOW DIOCTYL ADIPATE (DOA) CHANGES A POLYMER SYSTEM

External plasticization affects the interactions between existing chains. In a compatible matrix, incorporation of the ester can increase mobility and reduce rigidity. The liquid is not converted into a covalently attached part of the polymer merely by blending it into PVC.

That distinction creates a performance trade-off. Initial flexibility may be useful, but loss or redistribution of plasticizer can change properties with time. A development program should therefore examine the article after aging and contact with relevant extraction media, as well as immediately after manufacture.

Evaluate incorporation, mechanical balance and retention as separate outcomes. A visually uniform compound does not prove satisfactory tensile properties, and an acceptable hardness does not prove low migration. The complete resin and additive package determines the result.

DIOCTYL ADIPATE (DOA) PROPERTY PROFILE

An evaluated flavoring specification for the linear identity reports:

Assay requirement: minimum 98%
Acid-value requirement: maximum 1 mg KOH/g
Refractive-index interval: 1.444-1.450
Specific-gravity interval at 20°C: 0.924-0.930
Description: clear, colorless liquid with a slight fatty aroma
Solvent behavior: soluble in ethanol and practically insoluble in water

These figures belong to the particular specification and should not be promoted as a universal industrial grade. Another specialist product is offered at assay ≥97%. The relevant analytical method and agreed acceptance criteria determine how such grades are compared.

An incoming-quality plan should also address water, residual octanol, color and application-specific impurities. Acid value measures titratable acidity, not the pH of the neat ester. Relative density and viscosity, when specified, must retain their measurement conditions.

Temperature data require additional care because records labeled DOA can mix isomer identities or omit the test basis. Universal freezing, boiling and flash-point values are not assigned here. Obtain the exact grade data needed for storage or equipment design from Ataman Kimya, rather than transferring a value from another octyl adipate.

DIOCTYL ADIPATE (DOA) APPLICATION ROUTES

PVC compounding: the ester is evaluated as part or all of the plasticizer fraction. Selection depends on the targeted stiffness, elongation, processability and retention requirements of the finished compound.

Other compatible resins: rubber and cellulose-resin formulations can be considered where compatibility is established. The performance of one polymer cannot be applied automatically to a different binder or elastomer.

Flexible coatings: testing should follow the actual binder, application and aging conditions. Surface quality, flexibility and extraction behavior need to be assessed together.

Analytical work: a neat reference chemical or defined solution supports identification and measurement. The solvent, concentration and any supplied uncertainty are part of the product specification.

Specialist sensory work: the linear identity appears in flavoring records and specialist fragrance-related supply. Such products require separate quality and intended-use documentation, rather than borrowing an industrial plasticizer specification.

DIOCTYL ADIPATE (DOA) IN FLAVORING AND REGULATED APPLICATIONS

FEMA 4476 and JECFA 1968 document the linear CAS identity. The JECFA evaluation dates to 2010 and addresses the flavoring intake conditions evaluated then. This record is not an unlimited use-rate recommendation or evidence that an unspecified batch is suitable for consumption.

Direct flavoring, packaging contact and fragrance use follow different application requirements. A skin-contact formulation likewise needs confirmation of ingredient identity and grade suitability. Application documentation should cover the supplied product, destination and intended conditions.

Neither a flavoring identifier nor a non-phthalate structure establishes medical-device suitability. For a proposed regulated use, request the relevant documentation from Ataman Kimya before treating the material as qualified.

DIOCTYL ADIPATE (DOA) PERFORMANCE TARGETS AND LIMITATIONS

When rigidity is excessive, a compatible plasticizer can help bring the compound toward its flexibility target. The assessment should include strength and elongation, because softer material is not necessarily a better-performing article.

When incorporation is uneven, review the resin, mixing route and package compatibility before changing the loading. A phase or surface defect should not be attributed to plasticizer quantity alone.

When performance changes during use, investigate migration, extraction and aging conditions. Very low water solubility of the raw liquid does not establish resistance to oils or organic media.

When comparing batches, connect the observed behavior with identity and assay records. Documented raw-material differences are more useful than a general DOA label for explaining inconsistent results.

PLANNING FORMULATIONS WITH DIOCTYL ADIPATE (DOA)

Define the resin grade and process first, then state the total plasticizer loading and the property limits that the article must meet. Keep the distinction between weight percent of a compound and phr per 100 parts resin explicit. Do not combine dry-blend observations with unsupported claims about plastisol storage or gelation.

The following two starting compositions are proposed laboratory designs, not established commercial recipes. Percentages are by weight of the full initial compound, with ingredients as supplied. Additive selections and quantities are provisional and need adjustment for the actual PVC, stabilizer and lubricant products.

DIOCTYL ADIPATE (DOA) EXAMPLE 1: SINGLE-ESTER SCREEN

Components:

Selected PVC resin: 72.00%
Dioctyl adipate, verified CAS 123-79-5: 25.00%
Calcium/zinc PVC stabilizer package: 2.00%
Compatible PVC processing lubricant: 1.00%
Total: 100.00%

This charge contains approximately 34.72 phr plasticizer, calculated from 25 / 72 × 100. The number 25 describes a weight percentage of the full compound, not a phr value.

Evaluation criteria:

Uniform incorporation and visible surface condition
Hardness and tensile-property balance
Flexibility at the intended low temperature
Extraction and surface migration
Property changes after thermal aging

Record manufacturing conditions and test results without assigning predicted performance. The trial does not establish food-contact, cable, toy or medical compliance.

DIOCTYL ADIPATE (DOA) EXAMPLE 2: TWO-ESTER COMPARISON

Components:

The same PVC resin: 72.00%
Dioctyl adipate, verified CAS 123-79-5: 10.00%
Bis(2-ethylhexyl) terephthalate, DOTP: 15.00%
The same calcium/zinc stabilizer package: 2.00%
The same processing lubricant: 1.00%
Total: 100.00%

Total plasticizer remains approximately 34.72 phr. The linear adipate contributes about 13.89 phr and DOTP about 20.83 phr. Holding resin and provisional additive levels constant makes the plasticizer package the principal composition change between the examples.

Evaluation criteria:

Comparison with Example 1 at matched processing conditions
Compatibility during storage and after processing
Mechanical response at comparable conditioning
Migration, extraction and mass retention
Cold-flexibility and aging results

Include a suitable control where needed. Results require measurement, they cannot be derived by averaging the two raw-material descriptions. Any reformulation must be rebalanced to 100% and reassessed.

ALTERNATIVES AND COMPARATORS FOR DIOCTYL ADIPATE (DOA)

Bis(2-ethylhexyl) adipate is the most important identity comparator. Its CAS 103-23-1 and branched structure distinguish it from this page's linear ester, even though both share C22H42O4.

DOTP supplies a different, terephthalate-based plasticizer structure. Longer-chain adipates such as diisodecyl and diisotridecyl adipates provide further ester options. The appropriate choice depends on compatibility and finished-product requirements, not an equal-mass replacement rule.

Keep the comparison tied to the end use. A material selected for processing ease may not provide the best permanence, while an analytical standard is selected for measurement quality rather than industrial cost or throughput.

DIOCTYL ADIPATE (DOA) PURCHASE CHECKLIST

Order description: linear n-octyl adipate, CAS 123-79-5, EC 204-652-9.
Supply form: neat material or solution, with any solvent and concentration declared.
Quality basis: assay method, residual acidity, moisture, alcohol and impurity requirements.
Application basis: intended resin, sensory or analytical purpose and any restrictions.
Documentation: batch COA, relevant technical specification and current SDS.
Delivery basis: quantity, packaging, traceability, destination and timing.

Use these fields together. A COA provides batch results, a technical specification establishes characteristics and limits, and an SDS addresses safe handling. None substitutes for a statement supporting a regulated application.

Costs vary with the grade, certification, pack size and order volume. For a meaningful quotation, ask Ataman Kimya to identify the offered product and clarify missing limits before comparing prices.

DIOCTYL ADIPATE (DOA) STORAGE, SPILLS AND TRANSPORT

Store in identified, tightly closed containers with clean handling equipment. Protect against contamination, strong oxidizers and unnecessary heating. The appropriate storage temperature and shelf life should be confirmed for the offered grade with Ataman Kimya.

Contain the oily liquid after a leak, absorb it with a suitable material and keep it out of drains. Remove the slipping hazard and arrange disposal of residues and contaminated packaging through the applicable waste route.

The reviewed supplier product is reported as not regulated as dangerous goods under the stated US road, sea and air provisions. Confirm that determination for the actual supply, rather than assigning a UN number taken from a different substance or mixture.

WORKPLACE SAFETY FOR DIOCTYL ADIPATE (DOA)

A reviewed 2026 US supplier SDS assigns H315 and H319, indicating skin and eye irritation for its product. Other records differ, so use the current supplied-grade classification within the destination framework. The common name is not evidence of universal harmlessness.

Suitable gloves, eye protection and ventilation should match the operation. Wash after skin exposure and remove contaminated clothing. Rinse eyes carefully after contact and seek medical attention, especially for persistent symptoms or significant exposure.

The organic ester can burn and produce carbon oxides. Prevent uncontrolled heating and contact with strong oxidizers, and control environmental release regardless of the intended application.

DIOCTYL ADIPATE (DOA) FROM ATAMAN KIMYA

Contact ATAMAN KİMYA with the required CAS identity and use to discuss suitable Dioctyl adipate (DOA) supply. Availability, packaging and technical documentation should be confirmed against the offered grade.

An inquiry should state the trial or production quantity, acceptance limits, required application documents and delivery schedule. Explicitly requesting the linear n-octyl ester helps avoid confusion with other materials called DOA.

FREQUENT QUESTIONS ABOUT DIOCTYL ADIPATE (DOA)

What does DOA stand for in this article?
Dioctyl adipate, specifically the linear n-octyl ester with CAS 123-79-5.

Which EC number belongs to that identity?
204-652-9.

What are the formula and molar mass?
C22H42O4 and approximately 370.57 g/mol.

Why can two DOA offers describe different materials?
The abbreviation also appears for branched bis(2-ethylhexyl) adipate, CAS 103-23-1.

How can the structure be checked?
Match the CAS number, alcohol-derived groups and supplier identity documentation.

What is the intended effect in a compatible plastic?
Adjustment of chain mobility and flexibility through external plasticization.

Why test migration as well as hardness?
Hardness describes an initial mechanical property, while migration addresses retention of the plasticizer.

Does ethanol solubility mean water solubility?
No, the evaluated specification reports ethanol solubility and practical insolubility in water.

Is this a phthalate plasticizer?
No, its acid-derived structure is an aliphatic adipate.

Can the loading be reported simply as a percentage?
Only when the basis is stated, because full-compound weight percent differs from phr on resin.

Are the examples ready for manufacture?
No, they are proposed screening compositions requiring process development and validation.

Why use the same resin in comparative trials?
It reduces the number of composition changes that could explain a result.

Does a clear liquid prove sufficient purity?
No, identity, assay and impurity measurements remain necessary.

Is acid value a pH reading?
No, it is a measure of titratable acidity.

What do the specialist flavoring numbers establish?
FEMA 4476 and JECFA 1968 identify relevant flavoring records, not universal application approval.

Can food-contact claims be taken from another octyl adipate?
No, the exact supplied identity, grade and intended conditions require documentation.

Is there one handling classification for every offer?
No, confirm the current SDS and applicable jurisdiction for the offered product.

What information improves a supply inquiry?
The linear CAS identity, intended use, quantity, quality limits and required documents.

DIOCTYL ADIPATE (DOA) - TECHNICAL SUMMARY

Dioctyl adipate (DOA), as identified here, is the linear n-octyl ester of adipic acid. CAS 123-79-5 and EC 204-652-9 specify this identity, with formula C22H42O4 and molar mass approximately 370.57 g/mol.

The abbreviation also serves another adipate identity in commercial use. Structural confirmation keeps specifications and performance claims aligned with the actual supplied material.

In compatible polymers, this ester functions as an external plasticizer. Formulation selection should combine incorporation and mechanical-property testing with migration, extraction and aging assessment.

Technical, analytical and sensory grades are purchased on different quality bases. Appearance alone cannot establish assay, permitted use or equivalence between offers.

Current safety and transport documents and application-specific evidence remain necessary for the real product. Neither a laboratory example nor a specialist record establishes every final-use qualification.

Dioctyl adipate (DOA) can be sourced from ATAMAN KİMYA. For further information and supply inquiries about Dioctyl adipate (DOA), please contact ATAMAN KİMYA.