What is Polyvinyl Alcohol PVA CAS 9002-89-5?

Polyvinyl Alcohol, also called PVA or PVOH, CAS 9002-89-5, is a water-soluble synthetic polymer made by hydrolyzing polyvinyl acetate. It is supplied as a white to off-white powder or granules and is valued for film-forming ability, adhesion, tensile strength and chemical resistance.

What is the difference between fully hydrolyzed and partially hydrolyzed PVA?

Partially hydrolyzed PVA, commonly around 86-90% hydrolysis, dissolves more readily in cold or warm water and has strong adhesion to many surfaces. Fully hydrolyzed PVA, commonly around 98-99% hydrolysis, needs hotter water for complete dissolution but gives higher water resistance and tensile strength.

What do PVA grade numbers such as 17-88 or 24-88 mean?

These trade numbers usually indicate viscosity grade and degree of hydrolysis. For example, the first part is related to solution viscosity and molecular weight, while 88 indicates about 87-89% hydrolysis, a partially hydrolyzed grade. The correct grade depends on solubility, viscosity and final-use requirements.

What are the main applications of Polyvinyl Alcohol?

PVA is used in paper, wood, textile and specialty adhesives, water-soluble films and PVA bags, textile warp sizing, and paper surface sizing. It is also added to cement mortars, tile adhesives and putties to improve water retention, workability and bond strength.

How should PVA powder be dissolved for industrial use?

Partially hydrolyzed powder grades can dissolve gradually in cold or warm water with agitation, while fully hydrolyzed grades generally require heating, often above 80 C, for complete dissolution. Add the powder slowly to agitated water and avoid lumping to obtain a clear, uniform solution.

Polyvinyl Alcohol (PVA) CAS 9002-89-5

Polyvinyl Alcohol, also called PVA or PVOH, CAS 9002-89-5, is a water-soluble synthetic polymer supplied for adhesives, films, textiles and construction. Confirm the required grade and specification, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 9002-89-5
Synonyms: PVA, PVOH, PVAL, Vinyl alcohol polymer, Polyviol, Ethenol homopolymer
Einecs: 209-008-0
Molecular Formula: (C₂H₄O)n
Grade: Industrial Grade (Powder / Granular)
Package: 25/50 kg bag (standard); Jumbo bag (500–1000 kg) optional

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Product Description

Polyvinyl Alcohol, also called PVA or PVOH, CAS 9002-89-5, is a water-soluble synthetic polymer made by hydrolyzing polyvinyl acetate.

Synonyms: PVA; PVOH; PVAL; Vinyl alcohol polymer; Polyviol; Ethenol homopolymer.

CAS: 9002-89-5.

It has the repeating unit (C2H4O)n; the average molecular weight varies by grade, commonly about 30,000 to 150,000 or higher.

It is a white to off-white powder or granular solid.

It dissolves in hot water and is essentially insoluble in most organic solvents.

Aqueous solutions are about pH 5–7 and form clear, colorless films.

It is odorless, non-toxic and exhibits high tensile strength, flexibility and chemical resistance in formulated products.

Partially hydrolyzed grades, commonly about 86–90% hydrolysis, dissolve more readily in cold or warm water.

Fully hydrolyzed grades, commonly about 98–99% hydrolysis, need hotter water but give higher water resistance and tensile strength.

It is used in paper, wood, textile and specialty adhesives, and in water-soluble films and PVA bags.

It is used as a textile warp sizing agent and in paper surface sizing.

It is added to cement mortars, tile adhesives and putties to improve water retention, workability and bond strength.

Grade numbers such as 17-88 or 24-88 indicate viscosity grade and degree of hydrolysis.

Confirm appearance, degree of hydrolysis, viscosity, molecular weight, pH, moisture and residue limits.

Store in sealed original packaging in a cool, dry, ventilated warehouse, away from moisture, heat, direct sunlight and strong oxidizers.

Confirm packaging with the requested quantity and destination requirements.

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 grade and specification, quantity, packaging, destination and document needs.

FAQ - Technical & Supply Chain

Q:
What is Polyvinyl Alcohol PVA CAS 9002-89-5?

A: Polyvinyl Alcohol, also called PVA or PVOH, CAS 9002-89-5, is a water-soluble synthetic polymer made by hydrolyzing polyvinyl acetate. It is supplied as a white to off-white powder or granules and is valued for film-forming ability, adhesion, tensile strength and chemical resistance.
Q:
What is the difference between fully hydrolyzed and partially hydrolyzed PVA?

A: Partially hydrolyzed PVA, commonly around 86-90% hydrolysis, dissolves more readily in cold or warm water and has strong adhesion to many surfaces. Fully hydrolyzed PVA, commonly around 98-99% hydrolysis, needs hotter water for complete dissolution but gives higher water resistance and tensile strength.
Q:
What do PVA grade numbers such as 17-88 or 24-88 mean?

A: These trade numbers usually indicate viscosity grade and degree of hydrolysis. For example, the first part is related to solution viscosity and molecular weight, while 88 indicates about 87-89% hydrolysis, a partially hydrolyzed grade. The correct grade depends on solubility, viscosity and final-use requirements.
Q:
What are the main applications of Polyvinyl Alcohol?

A: PVA is used in paper, wood, textile and specialty adhesives, water-soluble films and PVA bags, textile warp sizing, and paper surface sizing. It is also added to cement mortars, tile adhesives and putties to improve water retention, workability and bond strength.
Q:
How should PVA powder be dissolved for industrial use?

A: Partially hydrolyzed powder grades can dissolve gradually in cold or warm water with agitation, while fully hydrolyzed grades generally require heating, often above 80 C, for complete dissolution. Add the powder slowly to agitated water and avoid lumping to obtain a clear, uniform solution.

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