PVA Pharmaceutical Excipients
LIWEI CHEMICAL CO. LTD
|
Appearance |
Polyvinyl Alcohol |
|
Total Solids wt%(min) |
9002-89-5 |
White to yellowish powder or translucent granule.
Medium soluble in ethanol, slightly soluble in acetone, almost insoluble in acetone. The
solubility of PVA XX-88 model is relatively good in hot water and cold water.
|
Model |
Viscosity(mPa.S) |
Grain Size |
|
03-88 |
3.0-4.5 |
Granule |
|
03-88 |
3.0-4.5 |
Powder |
|
05-88 |
4.5-6.0 |
Granule |
|
05-88 |
4.5-6.0 |
Powder |
|
17-88 |
20-24 |
Granule |
|
17-88 |
20-24 |
Powder |
|
24-88 |
40-60 |
Granule |
|
24-88 |
40-60 |
Powder |
|
20-88 |
32 |
Granule |
|
05-99 |
4.5-6.0 |
Granule |
|
08-99 |
|
Granule |
|
17-99 |
20-30 |
Granule |
|
24-99 |
|
Granule |
| Packing |
5kg per bag, 20/25kg per drum Appearance: |
|---|---|
| Storage | Powder 20°C 2 years; Floccule 20°C 2 years. |
| Shipping | Room temperature 5-30℃ in China; may vary elsewhere |
| Liwei PVA is one of the top 10 PVA factories and the top 100 strongest enterprises in anhui province.In 2005,Liwei PVA is evaluated as advanced and high technical company. We mainly deals in polyvinyl alcohol,PVA,PVA fiber and raw materials for producing PVA like vinyl acetate,calcium carbide. |
| For samples, pricing, or more information, please call us at 0086-25-52397803 or mai to info@china-pva.net or fill out the following form. We will respond to you as soon as possible. |
This product is prepared by alcoholysis of polyvinyl acetate in methanol solution by adding
alkali solution. The molecular formula is expressed by (CH2CHOH) n (CH2CHOCOCH3) m, where ‘m
+ n’ represents the average degree of polymerization, and m/n should be 0~0.35. The average
molecular weight shall be 20000 ~ 150000.
There are many types of polyvinyl alcohol according to the degree of polymerization and alcoholysis. The common naming standard for product models is “polyvinyl alcohol xy-mn”, where xy represents the average degree of polymerization and mn represents the degree of alcoholysis. Our company mainly produces models with alcoholysis degree of 88%, including 03-88, 05-88, 17-88，24-88 and 20-88 models, and other models can be customized if necessary.
This product has good film-forming characteristics, and can be used as a film-forming material in film agents and film coating agents, and can also be used as a film-forming material in thin film; This product also has a good suspending effect. It can also be used as emulsifiers and emulsification stabilizers in o/w emulsions. It can also be used as thickening agents, lubricants and protective agents in some eye drops.This product also has gel-forming properties and is used in some gel dosage forms such as gel patches. It can be used as an adhesive for ordinary tablets, granules, etc.
As a film-forming material in coating agent/ spray agent/ film-coated agents As thickening
agents, lubricants and suspending agents in eye drops
As binder in tablets and granules
Used in gel dosage forms due to gel-forming properties
As emulsifiers/emulsification stabilizers in o/w emulsions due to its good suspending effect
As a coating material for food additives
Polyvinyl alcohol has various reactions of secondary hydroxyl compounds, such as esterification reaction. It will drop in strong acids, soften or dissolve in weak acids and alkalis. High concentrations of PVA is incompatibility with inorganic salts, especially sulphate and phosphate. Phosphate can precipitate 5% (W/V) of polyvinyl alcohol. Borax can make PVA forms a gel.
This product is generally a non-toxic material. When the concentration is as high as 10%, it has no irritation to skin and eyes. Cosmetics can use polyvinyl alcohol with a concentration of up to 7%. Rat experiments show that subcutaneous injection of 5% (W/V) polyvinyl alcohol can cause anemia.