79-41-4 structure, C4H6O2

methacrylic acid

CAS No.

79-41-4

Formula:

C4H6O2

Basic Info

Methacrylic acid, abbreviated MAA, is an organic compound. This colorless, viscous liquid is a carboxylic acid with an acrid unpleasant odor. It is soluble in warm water and miscible with most organic solvents. Methacrylic acid is produced industrially on a large scale as a precursor to its esters, especially methyl methacrylate (MMA) and poly(methyl methacrylate) (PMMA). The methacrylates have numerous uses, most notably in the manufacture of polymers with trade names such as Lucite and Plexiglas. MAA occurs naturally in small amounts in the oil of Roman chamomile.

Formula
C4H6O2
Molecular Weight
86.0892
Exact Mass
86.0368
LogP
0.6471
PSA
37.3
Synonyms

Loctite3298

METAACRYLIC ACID

2-methylpropenoic acid

FX668F

acidemethacrylique

Methacrylic acid

acidometacrilico

2-Propenoic acid, 2-methyl-

CH2=C(CH3)COOH

GE110

(methyl)acrylic acid

methylcrotonic acid

2-methylacrylic acid

expand collapse

Properties

Appearance & Physical State
colourless liquid or crystals with an unpleasant odour.
Density
1.015
Boiling Point
163ºC
Melting Point
16ºC
Flash Point
76ºC
Refractive Index
1.4295-1.4315
Water Solubility
9.7 g/100 mL (20 ºC)
Stability
May be stabilized by the addition of MEHQ (Hydroquinone methyl ether, ca. 250 ppm) or hydroquinone. In the absence of a stabilizer this material will readily polymerize. Combustible. Incompatible with strong oxidizing agents, hydrochloric acid.
Storage Condition
Indoors
Vapor Density
>3 (vs air)
Vapor Pressure
1 mm Hg ( 20 °C)

Safety Info

RTECS
OZ2975000
Safety Statements
S26-S36/37/39-S45
WGK Germany
1
Risk Statements
R21/22; R35
HS Code
2916130010
RIDADR
UN 2531
Hazard Class
8
Packing Group
II
Caution Statement
P261; P280; P301 + P312 + P330; P303 + P361 + P353; P304 + P340 + P310; P305 + P351 + P338
Hazard Codes

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