Polyvinyl Alcohol (9002-89-5)
Basic Information
Chemical Name: Polyvinyl Alcohol
Chinese Aliases: Polyvinyl Alcohol Resin; PVA
English Name: Polyvinyl Alcohol
Molecular Formula: [-CH₂CH(OH)-]ₙ (polymer, no fixed formula)
Molecular Weight: Varies depending on polymerization, common range 20,000–200,000
CAS Number: 9002-89-5
EINECS Number: Not applicable (polymers are not required to have an EINECS number)
Appearance: White or off-white granules or powder, odorless, soluble in water, insoluble in organic solvents, with good film-forming and emulsifying properties.
Technical Parameters
Specifications
Grade
Fiber-grade Polyvinyl Alcohol Resin
Degree of Hydrolysis / % (mol/mol)
Average Polymerization
Volatile Matter / % ≤
Sodium Acetate / % ≤
Ash / % ≤
Purity / % ≥
Transparency / % ≥
Sodium Hydroxide / % ≤
Regular Water-soluble Material
Premium
99.5–100.0
1700–1800
5.0
2.0
0.8
93.0
95.0
0.10
High Strength Material
Premium
99.8–100.0
1750–1900
5.0
2.5
1.0
92.5
—
—
Grade
Non-fiber-grade Polyvinyl Alcohol Resin (High Alkaline)
Degree of Hydrolysis / % (mol/mol)
Viscosity / mPa.s
Volatile Matter / % ≤
Sodium Acetate / % ≤
Ash / % ≤
pH
Purity / % ≥
Premium
99.0–100.0
20.0–26.0
6.5
6.5
2.5
7–10
86.5
Premium
99.0–100.0
26.0–34.0
6.5
6.5
2.5
7–10
86.5
Premium
99.0–100.0
34.0–42.0
6.5
6.5
2.5
7–10
86.5
Premium
99.0–100.0
45.0–55.0
6.5
6.5
2.5
7–10
86.5
Premium
99.0–100.0
55.0–65.0
6.5
6.5
2.5
7–10
86.5
Packaging Specifications
The regular packaging is a 25kg kraft paper bag or a composite woven bag, with a polyethylene liner sealed inside; ton bags can also be provided according to customer requirements.