What is Vinyl Acetate Monomer and how is it identified?

Vinyl acetate monomer, also called VAM, has CAS 108-05-4, EINECS 203-545-4, molecular formula C₄H₆O₂ and molecular weight 86.09. Common synonyms include vinyl ethanoate, acetic acid vinyl ester, acetoxyethene, ethenyl acetate and ethenyl ethanoate.

What is Vinyl Acetate Monomer used for?

VAM is mainly used as a monomer to make polyvinyl acetate, polyvinyl alcohol and copolymers such as ethylene-vinyl acetate. These polymers are used in adhesives, paints and coatings, paper and packaging, textiles, construction products and specialty films.

Which specifications should be confirmed when purchasing Vinyl Acetate Monomer?

Confirm assay or purity, water content, color, acidity or acetic acid, acetaldehyde, and inhibitor type and level. Industrial grade may specify about 99% purity, while polymer-grade material normally uses a higher assay and a controlled hydroquinone or MEHQ level.

Why is inhibitor content important for Vinyl Acetate Monomer?

VAM is a reactive, flammable monomer that can undergo premature polymerization during storage and transport. Hydroquinone is commonly used, often around 3-20 ppm depending on grade, so the batch inhibitor type and remaining level should match the planned storage time and polymerization process.

How should Vinyl Acetate Monomer be stored and handled?

Keep VAM in tightly closed, grounded containers in a cool, ventilated flammable-liquid storage area away from heat, sparks, open flames and oxidizers. Because it is highly flammable and polymerization-sensitive, use vapor controls and chemical-resistant PPE, and monitor inhibitor level and storage temperature.

Vinyl Acetate Monomer CAS 108-05-4

Vinyl Acetate Monomer (VAM), CAS 108-05-4, is a vinyl ester monomer used to make polyvinyl acetate, polyvinyl alcohol and copolymers. Confirm the required purity, inhibitor package and handling requirements for the intended process.

CAS: 108-05-4
Synonyms: VAM, Vinyl ethanoate, Acetic acid vinyl ester, Acetoxyethene, Ethenyl acetate
Einecs: 203-545-4
Molecular Formula: C₄H₆O₂
Grade: Industrial grade 99%
Package: 200kg iron drum or 50kg plastic drum packing

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Product Description

Vinyl Acetate Monomer (VAM), CAS 108-05-4, is a vinyl ester also named vinyl ethanoate or acetic acid vinyl ester; the EC/EINECS number is 203-545-4.

Synonyms: VAM; Vinyl ethanoate; Acetic acid vinyl ester; Acetoxyethene; Ethenyl acetate.

CAS: 108-05-4.

Molecular formula: C₄H₆O₂.

Molecular weight: 86.09.

EC number: 203-545-4.

It is a clear, colorless, highly flammable liquid with a sweet, ether-like odor that is slightly soluble in water and soluble in ethanol, acetone, benzene and chloroform.

Typical properties include melting point about -93 °C, boiling point about 72-73 °C, flash point about -8 °C (closed cup), and relative density about 0.93.

It is widely used as a monomer to make polyvinyl acetate and polyvinyl alcohol, and copolymers such as ethylene-vinyl acetate, for adhesives, paints and coatings, paper and packaging, textiles, construction products and specialty films.

It is also copolymerized with vinyl chloride, acrylonitrile and other monomers to produce polymers with tailored properties, and used in latex paints, paper coatings and oil-condensation thickener intermediates.

Confirm assay or purity, water content, color, acidity or acetic acid, acetaldehyde, and inhibitor type and level; polymer-grade material normally uses a higher assay and a controlled hydroquinone or MEHQ level.

VAM is highly flammable and polymerization-sensitive. Keep in tightly closed, grounded containers in a cool, ventilated flammable-liquid area away from heat, sparks, open flames and oxidizers, and use vapor controls and chemical-resistant PPE.

Confirm the current product-specific specification.

Confirm packaging with the requested quantity and destination requirements.

Document requirements should be confirmed from the current specification, SDS, COA, or other product-specific files.

Regulated-use suitability must be confirmed separately with current product-specific documentation.

The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

For an RFQ, state the intended use, required specification, quantity, packaging, destination, and document needs.

FAQ - Technical & Supply Chain

Q:
What is Vinyl Acetate Monomer and how is it identified?

A: Vinyl acetate monomer, also called VAM, has CAS 108-05-4, EINECS 203-545-4, molecular formula C₄H₆O₂ and molecular weight 86.09. Common synonyms include vinyl ethanoate, acetic acid vinyl ester, acetoxyethene, ethenyl acetate and ethenyl ethanoate.
Q:
What is Vinyl Acetate Monomer used for?

A: VAM is mainly used as a monomer to make polyvinyl acetate, polyvinyl alcohol and copolymers such as ethylene-vinyl acetate. These polymers are used in adhesives, paints and coatings, paper and packaging, textiles, construction products and specialty films.
Q:
Which specifications should be confirmed when purchasing Vinyl Acetate Monomer?

A: Confirm assay or purity, water content, color, acidity or acetic acid, acetaldehyde, and inhibitor type and level. Industrial grade may specify about 99% purity, while polymer-grade material normally uses a higher assay and a controlled hydroquinone or MEHQ level.
Q:
Why is inhibitor content important for Vinyl Acetate Monomer?

A: VAM is a reactive, flammable monomer that can undergo premature polymerization during storage and transport. Hydroquinone is commonly used, often around 3-20 ppm depending on grade, so the batch inhibitor type and remaining level should match the planned storage time and polymerization process.
Q:
How should Vinyl Acetate Monomer be stored and handled?

A: Keep VAM in tightly closed, grounded containers in a cool, ventilated flammable-liquid storage area away from heat, sparks, open flames and oxidizers. Because it is highly flammable and polymerization-sensitive, use vapor controls and chemical-resistant PPE, and monitor inhibitor level and storage temperature.

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