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)
form :Liquid
pka :pK1:4.66 (25°C)
color :Clear
PH :2.0-2.2 (100g/l, H2O, 20℃)
Odor :Repulsive
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)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes 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
Precautionary statements:	P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P312 IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.