Methacrylic acid

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Chemical Properties

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Methacrylic acid Basic information

Product Name:	Methacrylic acid
Synonyms:	.alpha.-Methylacrylicacid;2-Methyl-2-propenoic acid;2-methyl-2-Propenoicacid;2-Methyl-2-propensαure;2-methyl-acrylicaci;2-methylene-propionicaci;2-methylenepropionicacid;2-Methylpropencicacid
CAS:	79-41-4
MF:	C4H6O2
MW:	86.09
EINECS:	201-204-4
Product Categories:	fine chemical;Pyrazoles,Pyrazines
Mol File:	79-41-4.mol

Methacrylic acid Chemical Properties

Melting point	16 °C
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.)
Fp	170 °F
storage temp.	Indoors
form	Liquid
color	Clear
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
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.
CAS DataBase Reference	79-41-4(CAS DataBase Reference)
NIST Chemistry Reference	2-Propenoic acid, 2-methyl-(79-41-4)
EPA Substance Registry System	2-Propenoic acid, 2-methyl-(79-41-4)

Safety Information

Methacrylic acid Usage And Synthesis

Chemical Properties	colourless liquid or crystals with an unpleasant odour.
Definition	ChEBI: An alpha,beta-unsaturated monocarboxylic acid that is acrylic acid in which the hydrogen at position 2 is substituted by a methyl group.
General Description	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.
Air & Water Reactions	Soluble in water.
Reactivity Profile	Methacrylic acid reacts with strong oxidizing agents. Presents a storage hazard: violent exothermic polymerizations leading to explosion can occur spontaneously, particularly at low inhibitor or stabilizer concentrations [Anon., CISHC Chem. Safety Summ., 1979, 50, p. 34; Bond, J., Loss Prev. Bull., 1991, 101, p. 1].
Health Hazard	INHALATION: Severe irritation to respiratory tract. EYES: Short contact can cause severe damage. SKIN: Causes severe irritation and burns. Ingestion: High hazard - may cause death or permanent injury on short exposure to small quantities. OTHER: May affect blood pressure temporarily.