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Octadecyl acrylate/Stearyl Acrylate CAS 4813-57-4 SA

Octadecyl Acrylate is a long-chain alkyl acrylate monomer synthesized from stearyl alcohol and acrylic acid. It is mainly used in the production of specialty polymers and copolymers that require hydrophobicity, flexibility, and low-temperature performance. It appears as a colorless to slightly yellow transparent liquid or waxy substance at room temperature.

Also known as Stearyl Acrylate, this monomer has excellent film-forming properties, water repellency, and weather resistance. It is used to modify the surface properties of polymers and improve softness and water resistance. In cosmetics, it can act as a thickener or rheology modifier due to its high molecular weight and low polarity.

The chemical formula of Octadecyl Acrylate is C21H40O2. It is a reactive compound that participates in free-radical polymerization and is often used in copolymers with other acrylates, methacrylates, and vinyl compounds.


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Model:
4813-57-4
Brand:
bosschemical
Code:
4813-57-4

Product Description

Product name: Octadecyl Acrylate
English alias: Stearyl Acrylate; Octadecyl ester of acrylic acid
CAS: 4813-57-4
Molecular formula: C21H40O2
Appearance: Colorless to pale yellow transparent liquid or waxy solid
Package: 25kg/drum

What is Octadecyl Acrylate?

Octadecyl Acrylate is a long-chain alkyl acrylate monomer synthesized from stearyl alcohol and acrylic acid. It is mainly used in the production of specialty polymers and copolymers that require hydrophobicity, flexibility, and low-temperature performance. It appears as a colorless to slightly yellow transparent liquid or waxy substance at room temperature.

Also known as Stearyl Acrylate, this monomer has excellent film-forming properties, water repellency, and weather resistance. It is used to modify the surface properties of polymers and improve softness and water resistance. In cosmetics, it can act as a thickener or rheology modifier due to its high molecular weight and low polarity.

The chemical formula of Octadecyl Acrylate is C21H40O2. It is a reactive compound that participates in free-radical polymerization and is often used in copolymers with other acrylates, methacrylates, and vinyl compounds.

COA:

Item	Specification	Result
Appearance	Colorless or yellowish liquid/wax	Pale yellow liquid
Purity (%)	≥ 98.0	98.94
Acid value (mgKOH/g)	≤ 1.0	0.4
Water (%)	≤ 0.3	0.15
Inhibitor (MEHQ ppm)	200 ± 20	205
Conclusion		PASS

Application:

Used in the synthesis of pressure-sensitive adhesives and hot-melt adhesives to improve flexibility and tack
Suitable for use in automotive and industrial coatings to enhance water repellency and surface smoothness
Acts as a comonomer in emulsion and solution polymerization to produce hydrophobic acrylic resins
Used in textile finishing formulations to impart softness and antistatic properties
Functions as a rheology modifier and thickener in cosmetic creams, lotions, and other personal care products
Improves low-temperature performance and elasticity in rubber and elastomer applications
Used in UV-curable resins and 3D printing materials for modifying hardness and gloss

Safety profile:

Octadecyl Acrylate is a relatively low-toxicity chemical but should be handled with care. It may cause skin and eye irritation and should not be ingested or inhaled. It is recommended to wear gloves, safety goggles, and suitable protective clothing during handling. Inhibitors such as MEHQ are added to prevent self-polymerization during storage.

Storage requirements:

Keep the product sealed and dry
Store in a cool, well-ventilated area
Avoid direct sunlight and high temperatures
Maintain relative humidity < 50%
Prevent contamination with oxidizing agents or reactive chemicals

Transport & Packaging:

Octadecyl Acrylate for industrial use is supplied in various standard packaging options depending on customer needs. It can be packaged in:
25 kg drums
1000 kg IBC drums

Ensure proper labeling and compliance with transportation regulations for chemicals. Avoid exposure to extreme heat or mechanical shock during transit.