Home Categories Organic Chemistry Methylacrylic acid
A5362712

Methylacrylic acid , StandardforGC , 79-41-4

Synonym(s):
2-Methacrylic acid;2-Methylpropenoic acid;Methacrylic acid

CAS NO.:79-41-4

Empirical Formula: C4H6O2

Molecular Weight: 86.09

MDL number: MFCD00002651

EINECS: 201-204-4

Update time: 2022-07-08

PRODUCT Properties

Melting point: 12-16 °C (lit.)
Boiling point: 163 °C (lit.)
Density  1.015 g/mL at 25 °C (lit.)
vapor density  >3 (vs air)
vapor pressure  1 mm Hg ( 20 °C)
refractive index  n20/D 1.431(lit.)
Flash point: 170 °F
storage temp.  Store at +15°C to +25°C.
solubility  Chloroform, Methanol (Slightly)
pka pK1:4.66 (25°C)
form  Liquid
color  Clear
Odor Repulsive
PH 2.0-2.2 (100g/l, H2O, 20℃)
explosive limit 1.6-8.7%(V)
Water Solubility  9.7 g/100 mL (20 ºC)
Sensitive  Moisture & Light Sensitive
Merck  14,5941
BRN  1719937
Exposure limits TLV-TWA 20 ppm (~70 mg/m3) (ACGIH).
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.
InChIKey CERQOIWHTDAKMF-UHFFFAOYSA-N
LogP 0.93 at 22℃
CAS DataBase Reference 79-41-4(CAS DataBase Reference)
NIST Chemistry Reference 2-Propenoic acid, 2-methyl-(79-41-4)
EPA Substance Registry System Methacrylic acid (79-41-4)

Description and Uses

Methacrylic acid, abbreviated MAA, is an organic compound. This colourless, 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.

Methacrylic acid is used in the manufacture of methacrylate resins and plastics. It is used as Monomer for large-volume resins and polymers, organic synthesis. Many of the polymers are based on esters of the acid, as the methyl, butyl, or isobutyl esters. Methacrylic acid and methacrylate esters are used to prepare a wide range of polymers [→ Polyacrylamides and Poly(Acrylic Acids), → Polymethacrylates]. Poly(methyl methacrylate) is the primary polymer in this category, and it provides water-clear, tough plastics that are used in sheet form in glazing, signs, displays, and lighting panels.

Safety

Symbol(GHS) 
GHS05,GHS06
Signal word  Danger
Hazard statements  H302+H332-H311-H314-H335
Precautionary statements  P261-P280-P301+P312-P303+P361+P353-P304+P340+P310-P305+P351+P338
Hazard Codes  C
Risk Statements  21/22-35-37-20/21/22
Safety Statements  26-36/37/39-45
OEB A
OEL TWA: 20 ppm (70 mg/m3) [skin]
RIDADR  UN 2531 8/PG 2
WGK Germany  1
RTECS  OZ2975000
Autoignition Temperature 752 °F
TSCA  Yes
HS Code  2916 13 00
HazardClass  8
PackingGroup  II
Hazardous Substances Data 79-41-4(Hazardous Substances Data)
Toxicity LD50 orally in Rabbit: 1320 mg/kg

RELATED PRODUCTS