CAS 25087-26-7 Poly(methacrylic acid) - Materials / Alfa Chemistry

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Poly(methacrylic acid)

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Catalog Number

ACM25087267

Product Name

Poly(methacrylic acid)

Structure

CAS

25087-26-7

Category

Polymers

Description

Methacrylic acid appears as a clear colorless liquid (or low-melting solid) with a pungent odor. Corrosive to metals and tissue. Flash point 170°F. Melting point 61°F. May polymerize exothermically if heated or contaminated. If the polymerization takes place inside a container, the container may rupture violently. Less dense than water. Vapors heavier than air. Used to make plastics.;Liquid;COLOURLESS LIQUID OR COLOURLESS CRYSTALS WITH CHARACTERISTIC ODOUR.;Colorless liquid or solid (below 61°F) with an acrid, repulsive odor.;Colorless liquid or solid (below 61°F) with an acrid, repulsive odor.

IUPAC Name

2-methylprop-2-enoic acid

Molecular Weight

86.09g/mol

Molecular Formula

C4H6O2;CH2=C(CH3)COOH;C4H6O2;C4H6O2

Canonical SMILES

CC(=C)C(=O)O

InChI

InChI=1S/C4H6O2/c1-3(2)4(5)6/h1H2,2H3,(H,5,6)

InChI Key

CERQOIWHTDAKMF-UHFFFAOYSA-N

Boiling Point

325 °F at 760 mm Hg (NTP, 1992);163.0 °C;163 °C at 760 mm Hg;159-163 °C;325°F;325°F

Melting Point

61 °F (NTP, 1992);16.0 °C;16 °C;16 °C;61°F;61°F

Flash Point

170 °F (NTP, 1992);76 °C (open cup);153 °F (67 °C) (closed cup);68 °C c.c., 77 °C o.c.;171°F (open-cup);(oc) 171°F

Density

1.015 at 68 °F (USCG, 1999);1.0153 at 20 °C/4 °C;Relative density (water = 1): 1.02;1.015 at 68°F;1.02 (Liquid)

Solubility

greater than or equal to 100 mg/mL at 63° F (NTP, 1992);1.03 M;Soluble in chloroform; miscible with ethanol, ether;In water solubility, 89 g/L at 20 °C;Solubility in water: moderate;(77°F): 9%

Color/Form

Clear colorless liquid or colorless crystals;Long prisms

Complexity

83.5

Corrosivity

Forms corrosive liquid at melting point

Covalently-Bonded Unit Count

EC Number

201-204-4

Exact Mass

86.036779g/mol

Formal Charge

Hazard Statements

Irritant
, Unknown

Heat of Vaporization

0.418 kJ/mol at 101.3 kPa (760 mm Hg)

Heavy Atom Count

ICSC Number

0917

Log P

0.93 (LogP);log Kow = 0.93;0.93

MeSH Entry Terms

2-methylacrylic acid;methacrylic acid;methacrylic acid, calcium salt;methacrylic acid, sodium salt;sodium methacrylate

Monoisotopic Mass

86.036779g/mol

NSC Number

7393

Odor

Acrid, repulsive odor

Other Experimental

Specific heat capacity: 2.1 J/g K; critical volume: 270 cu cm/mol;Its vapors are heavier than air. /Methacrylic acid, glacial/;Heat capacity: 2.1-2.3 J/kg; heat of polymerization: 56.5 KJ/mole;Boiling point: 81 °C at 30 mm Hg; 63 °C at 12 mm Hg; polymer forms ceramic-looking mass, sol in absolute alcohol, from which it is precipitated by ether; polymerizes easily, especially on heating or in the presence of traces of HCl;Saturated concn in air: 3.0 g/cu m at 20 °C; 6.3 g/cu m at 30 °C.;Henry's Law constant = 3.9X10-7 atm-cu m/mole at 25 °C;Hydroxyl radical rate constant: 1.9X10-11 cu cm/molecule sec at 25 °C (est);Ozone reaction rate: 4.1X10-18 cu cm/molecule-sec at 23 °C

Refractive Index

Index of refraction: 1.43143 at 20 °C/D

Rotatable Bond Count

RTECS Number

OZ2975000

Stability

Acrylic acid and methacrylic acid readily polymerize in the presence of light, heat and oxygen, and also under the action of oxidizing agents such as peroxides.

UNII

1CS02G8656

UN Number

2531;2531;2531;2531;2531

Vapor Density

2.97 (NTP, 1992) (Relative to Air);2.97 (Air = 1);Relative vapor density (air = 1): 2.97;2.97

Vapor Pressure

0.65 mm Hg at 68 °F ; 1 mm Hg at 77° F (NTP, 1992);0.99 mmHg;0.99 mm Hg at 25 °C;Vapor pressure, Pa at 25 °C: 130;0.65 mmHg at 68°F;0.7 mmHg

Viscosity

1.38 mPa.s at 24 °C

XLogP3

0.9