CAS 9002-89-5 Polyvinyl Alcohol (PVA) - Materials / Alfa Chemistry

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Polyvinyl Alcohol (PVA)

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Catalog Number

ACM9002895-24

CAS Number

9002-89-5

Product Name

Polyvinyl Alcohol (PVA)

Structure

Category

Polymers

Description

Polyvinyl alcohol appears as odorless white to cream-colored granules or powder. Pure aqueous solutions are neutral or faintly acid and subject to mold growth. pH (4% aqueous solution): 5-8. Strongly hydrophilic. (NTP, 1992);Odourless, tasteless, translucent, white or cream-coloured granular powder;COLOURLESS-TO-WHITE SOLID IN VARIOUS FORMS.

IUPAC Name

ethenol

Molecular Weight

44.05g/mol

Molecular Formula

(C2H3OR)nwhere R = H or COCH3;(CH2CHOH-)n;CH2CHOH;C2H4O

Canonical SMILES

C=CO

InChI

InChI=1S/C2H4O/c1-2-3/h2-3H,1H2

InChI Key

IMROMDMJAWUWLK-UHFFFAOYSA-N

Boiling Point

644 °F at 760 mm Hg approximately (NTP, 1992);644 °F at 760 mm Hg /approximately/

Melting Point

442 °F (decomposes) (NTP, 1992);>200 °C; other melting points: 212-267 °C

Flash Point

175 °F (NTP, 1992);175 °F (79 °C) (open cup);79 °C o.c.

Density

1.329 (NTP, 1992);1.91 to 1.31;1.19-1.31 g/cm³

Solubility

Soluble (NTP, 1992);Soluble in water; sparingly soluble in ethanol;Soluble in water;Solubility in water: good;Water solubility increases as molecular weight decreases;Slightly soluble in ethanol, but insoluble in other organic solvents;Essentially soluble in hot and cold water, but those coded 20-105 require alcohol-water mixtures; Insoluble in petroleum solvents;Practically insoluble in animal and vegetable oils; insoluble in aromatic hydrocarbons, esters, ether, acetone; practically insoluble in chlorinated hydrocarbons;Solubility in water: good

Application

Polyvinyl Alcohol (PVA) is a versatile synthetic polymer known for its odorless and white to cream-colored granular form. Its primary purpose lies in its diverse applications across various industries. In pharmaceuticals, PVA serves as a crucial component in ophthalmic formulations, providing lubrication in products like artificial tears and contact lens solutions. It also acts as a stabilizer and viscosity-enhancing agent in emulsions and other formulations. Beyond pharmaceuticals, PVA finds utility in manufacturing surface coatings, cosmetics, and artificial sponges. Due to its unique properties, such as being one of the few water-soluble polymers, PVA can be transformed into robust films, tubes, and fibers that resist hydrocarbon solvents. Additionally, it can be made insoluble through cross-linking, expanding its application potential further into areas like drug delivery systems, fibers for surface-enhanced Raman spectroscopy (SERS) sensors, and transparent conducting oxides (TCOs).

Color/Form

Dry, unplasticized powders are white or cream colored;Colorless, white or cream, amorphous powder

Complexity

10.3

Covalently-Bonded Unit Count

EC Number

209-183-3;618-340-9

Exact Mass

44.026215g/mol

Formal Charge

Heavy Atom Count

ICSC Number

1489

MeSH Entry Terms

Alcohol, Polyvinyl;Liquifilm Tears;Polyvinyl Alcohol;Polyviol;Tears, Liquifilm

Monoisotopic Mass

44.026215g/mol

NSC Number

108129

Odor

Odorless

Other Experimental

Polymer average molecular weight: 120,000;Softens at about 200 °C with decomposition;Subject to mold growth;Decomposes at 228 °C;Undergoes chemical reactions typical of compound with secondary hydroxyl groups, including esterification and etherification;Strength, elongation, tear resistance, and flexibility improve with increasing molecular weight;Tensile strength up to 22,000 psi

Refractive Index

Index of refraction: 1.49-1.53

Rotatable Bond Count

RTECS Number

TR8100000

Stability

Stable under recommended storage conditions.

Vapor Pressure

Negligible (NTP, 1992);Negligible

Viscosity

/p>4,8 to 5,8 mPa.s (4 % solution at 20 °C) corresponding to an average molecular weight of 26 000-30 000 Da

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