Bis(2-ethylhexyl) Sebacate (Dioctyl Sebacate, DOS)

Definition and Chemical Identity

Bis(2-ethylhexyl) sebacate is produced by esterifying sebacic acid with 2-ethylhexanol. The names Dioctyl Sebacate (DOS) and Di(2-ethylhexyl) Sebacate refer to the product identified here by CAS 122-62-3.

Core Chemical Profile

For grade selection, request the current specification and COA covering assay, acid value, water, color and any required pour-point limit.

Primary Applications of Dioctyl Sebacate

Low-Temperature Plasticizer

DOS is used in selected PVC, cellulose-resin and synthetic-rubber formulations where flexibility at low temperatures is important.

• Wire and cable compounds: Used in formulating flexible insulation and sheathing materials.

• Films, sheets and artificial leather: Selected to support flexibility in cold-service applications.

• Rubber compounds: Evaluated as a plasticizer for low-temperature elasticity.

Resin compatibility, plasticizer loading, migration and finished-compound performance should be assessed for the intended use. Rubber cure behavior should also be checked in the actual formulation.

Synthetic Lubricants and Greases

DOS can serve as an ester base-stock component in formulated lubricants.

• Synthetic oils: Used where low-temperature fluidity and low volatility are relevant.

• Greases and specialty fluids: Evaluated as part of the base-fluid blend.

Aviation and other demanding applications require qualification of the selected base stock and complete lubricant formulation. Industrial DOS should not be treated as a ready-to-use jet-engine oil.

Storage and Handling

• Keep containers closed in a cool, dry, ventilated location.

• Protect from excessive heat and contamination; segregate from strong oxidizing agents.

• Use suitable gloves and eye protection, and avoid generating or inhaling mist.

• Treat spills promptly, as the oily liquid can make surfaces slippery.

• Follow the supplied SDS for storage conditions, fire precautions and disposal.

Confirm packaging type, net weight and any shelf-life or retest information before ordering.

Frequently Asked Questions

How does DOS differ from DOP?

DOS is a sebacate ester, while DOP commonly refers to DEHP, a phthalate ester. They differ in structure and formulation performance. Compare compatibility, low-temperature properties and application requirements before considering a substitution.

Does a plasticizer's pour point define a finished product's minimum service temperature?

No. A pour point describes the flow behavior of the liquid material under a particular test. The low-temperature performance of a PVC or rubber compound depends on its complete formulation and the relevant finished-product test.

Does high purity establish food-contact or medical suitability?

No. Purity alone does not establish suitability for these applications. Review the supplied grade's documentation and the specific finished-product requirements, including applicable food-contact conditions.

Contact Us

For DOS specifications, product documents, samples or pricing, contact Aozun with your intended application, required specification, quantity and destination.

Email: lisa@aozunchem.com
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