CAS 9002-89-5 Poly(vinyl Alcohol) (n=approx. 2000) (degree of saponification ca. 80mol%)

NAVIGATION

Poly(vinyl Alcohol) (n=approx. 2000) (degree of saponification ca. 80mol%)

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Catalog Number

ACM9002895-26

CAS Number

9002-89-5

Product Name

Poly(vinyl Alcohol) (n=approx. 2000) (degree of saponification ca. 80mol%)

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

Poly(vinyl Alcohol) is a versatile polymer known for its odorless, white to cream-colored granular form. With a degree of polymerization of approximately 2000 and a saponification level around 80mol%, it is primarily utilized across various applications due to its unique properties. It acts as a pharmaceutic aid and ophthalmic lubricant and finds use in the production of surface coatings, artificial sponges, and cosmetics. Notably, Poly(vinyl Alcohol) can be fabricated into strong films, tubes, and fibers that exhibit significant resistance to hydrocarbon solvents. Its water-solubility allows it to be incorporated into topical pharmaceutical and ophthalmic formulations, offering benefits as a stabilizing and viscosity-increasing agent. Additionally, it enhances drug delivery systems, serves in surface-enhanced Raman spectroscopy fiber-optic sensors, and supports transparent conducting oxides. The polymer can be made water-insoluble through drawing or cross-linking processes, and is instrumental in creating artificial tears, contact lens solutions, sustained-release oral formulations, and transdermal patches. When combined with a glutaraldehyde solution, it also forms microspheres for specialized applications.

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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