Methacrylic acid

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)
Specific Heat Capacity :Cp(liquid): 1.87 J/(g·K), at 25℃
Sensitive :Moisture & Light Sensitive
Merck :14,5941
BRN :1719937
Henry's Law Constant :2.5×10¹ mol/(m³Pa) at 25℃, Khan et al. (1992)
Exposure limits :PC-TWA:70 mg/m3
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.
Cosmetics Ingredients Functions :FILM FORMING
Cosmetic Ingredient Review (CIR) :Methacrylic acid (79-41-4)
InChI :1S/C4H6O2/c1-3(2)4(5)6/h1H2,2H3,(H,5,6)
InChIKey :CERQOIWHTDAKMF-UHFFFAOYSA-N
SMILES :C=C(C)C(O)=O
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)
ECETOC JACC REPORT :Methacrylic acid (79-41-4)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H227 Combustible liquid Flammable liquids Category 4 Warning P210, P280, P370+P378, P403+P235,P501 H290 May be corrosive to metals Corrosive to Metals Category 1 Warning P234, P390, P404 H311 Toxic in contact with skin Acute toxicity,dermal Category 3 Danger P280, P302+P352, P312, P322, P361,P363, P405, P501 H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501 H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning H372 Causes damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 1 Danger P260, P264, P270, P314, P501 H373 May cause damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 2 Warning P260, P314, P501 H402 Harmful to aquatic life Hazardous to the aquatic environment, acute hazard Category 3
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P234 Keep only in original container. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P314 Get medical advice/attention if you feel unwell. P370+P378 In case of fire: Use … for extinction. P390 Absorb spillage to prevent material damage. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P403+P235 Store in a well-ventilated place. Keep cool. P405 Store locked up. P406 Store in corrosive resistant/… container with a resistant inner liner. P501 Dispose of contents/container to..…