99% Industry grade Dioctyl sebacate CAS 122-62-3

1. What is Bis(2-ethylhexyl) sebacate?

Bis(2-ethylhexyl) sebacate , also known as di(2-ethylhexyl) sebacate (or diisooctyl sebacate, abbreviated as DOS) , is a fatty acid ester compound prepared by the esterification reaction of sebacic acid and 2-ethylhexanol. Its chemical formula is often expressed as C₂₆H₅₀O₄ CAS No. : 122-62-3 Molecular weight : about 426.68 EINECS No. : 204-558-8

At room temperature it is a colorless, transparent or slightly yellow oily liquid, with a somewhat peculiar smell. The density is about 0.910.92 g/cm³, the freezing point is about -55℃, the boiling point is about 255℃ (0.5 kPa), the flash point is about 210℃, the refractive index is about 1.451, and the viscosity at 20℃ is about 1921 mPa·s. Dioctyl sebacate is insoluble in water but soluble in most organic solvents such as ethanol, ether and benzene.

From the standpoint of molecular arrangement, dioctyl sebacate is a diester compound: two molecules of 2-ethylhexanol are esterified to sebacate. Its long carbon chain structure gives it good low temperature performance (the freezing point can reach -55℃) and good compatibility with polymers, and the ester group gives it flexibility and moisturizing properties. The "cold resistance + compatibility + moisturizing" multi-directional characteristic makes it an excellent cold-resistant plasticizer and a mild moisturizing ester recognized by the cosmetics industry, forming the structural basis for its application in plastics, cosmetics and food packaging.

Dioctyl sebacate is chemically stable, has low volatility, is resistant to heat and light and low in toxicity. It is non-irritant to the skin and demonstrated to be non-irritant to the human body. It is inflammable and must be kept away from fire sources. Storage: Store in a dry, sealed container. Keep away from strong oxidizers.

Non-industrial grade dioctyl sebacate refers to products for cosmetic and consumer use mainly composed of daily chemical and reagent grade specifications. Non-industrial grade products pay more attention to the following indicators compared with the industrial grade：

Impurity and Purity Monitoring

In the use of daily chemical products, it is necessary to contain high levels of active ingredients, low levels of impurities and strict control of harmful impurities such as heavy metals for safety.

acid number

The acid value is an indication of the free acid content which affects the product stability and quality of downstream formulations and needs to be kept at low levels.

Ester content

Ester content is an important measure for product purity, and has to be within the specified range.

Density and refraction index

Density (about 0.91~0.92) and refractive index are common indicators for judging purity and quality. They should conform to specifications.

II. What are the uses of Bis(2-ethylhexyl) sebacate?

1.Daily Chemical Grade, Core Application – Cosmetics & Personal Care

Application Field: Cosmetics and personal care industry.

Corresponding Products: Skin creams, lotions, sunscreens, hair care products, cosmetic emollient base materials, moisturizing factors, cosmetic stabilizers.

Applicability Principle: Dioctyl sebacate is an oil ester used in cosmetics that hydrates the skin. It is low in viscosity and leaves a refreshing feeling on the skin. It is used as a base for emollients and moisturizing factors and as a cosmetic stabilizer. It is widely used in skin creams, lotions, sunscreens and hair care products and has been proven non-irritating to the human body.

2.Cold resistant plasticizer (Core Application for Plastics)

Application Field: Plastic industry.

Corresponding Products: Cold-resistant wire and cable materials, artificial leather, films, hoses, outdoor fabrics, plasticized PVC, vinyl chloride copolymers, nitrocellulose, ethyl cellulose.

Applicability Principle: Dioctyl sebacate is a well known good cold resistant plasticizer in the plastics industry. It has high plasticizing efficiency, low volatility, good cold resistance (freezing point -55℃), heat and light resistance and excellent electric insulation properties. It is widely used in the plasticization of PVC, vinyl chloride copolymers, nitrocellulose, ethyl cellulose and other materials, and is used in cold-resistant wire and cable materials, artificial leather, films, hoses and outdoor fabrics.

3. Base oils for lubricants and greases

Application Field: Lubricant and grease manufacturing, household lubrication and precision equipment maintenance.

Corresponding Products: High temperature lubricating oils, low temperature greases, lubricants for sewing machines, door locks, precision instruments and low temperature equipment.

Applicability Principle: Dioctyl sebacate is used as a base oil for high temperature lubricating oils and low temperature greases, exhibiting excellent low temperature fluidity and thermal stability. It can be used for sewing machine, door lock, precision instrument and low temperature equipment lubrication and maintenance by using the excellent low temperature lubrication performance of dioctyl sebacate, to help the equipment run smoothly in low temperature environment.

4. Plasticizing of synthetic rubber

Application Field: Synthetic rubber processing industry.

Corresponding Products: Nitrile rubber and other synthetic rubber products, seals, hoses and low-temperature cold-resistant rubber products.

Applicability Principle: DOS has good compatibility with synthetic rubber, and has been used as a plasticizer for synthetic rubbers such as nitrile rubber, to improve the cold resistance and softness of the rubber compound. It is used on seals, hoses and low temperature products which must be resistant to cold.

5. Metal working fluids

Application Field: Metal machining industry.

Corresponding Products: Lubricating ingredients for metalworking fluids used in metal cutting and stamping processes.

Applicability Principle: DOS is used as a lubricating ingredient in metalworking fluids to improve the lubrication and cooling properties during machining operations. DOS is used in metalworking processes including cutting and stamping.

6.Studies on food contact materials (food grade)

Application Field: Food contact material research.

Corresponding Products: Plasticizer for food packaging materials.

Applicability Principle: Dioctyl sebacate is used as a plasticizer in food packaging materials. Its migration and safety studies are an important part of food contact materials science, and its use should be within the limits.

Summarize： Dioctyl sebacate (DOS) is a colorless to slightly yellow oily diester, also known as bis(2-ethylhexyl) sebacate, with a freezing point as low as -55°C. It has many properties such as cold resistance, compatibility, skin moisturizing etc. It is an excellent cold-resistant plasticizer and mild emollient which has been recognized in the cosmetics industry. In our daily life, we are indirectly exposed to it through PVC products, low temperature environment products, cosmetics, lubricants, food packaging materials and synthetic rubber products.