Melting point :110-115 °C (lit.)
alpha :[α]D20 -1～+1° (c=5, C2H5OH)
Boiling point :164.01°C (rough estimate)
Density :1.0951 (rough estimate)
refractive index :1.4240 (estimate)
storage temp. :Sealed in dry,Room Temperature
solubility :Chloroform (Slightly), DMSO (Sparingly), Methanol (Slightly)
form :Solid
pka :4.13(at 25℃)
color :White to Off-White
PH :3.62(1 mM solution);3.08(10 mM solution);2.57(100 mM solution)
Water Solubility :Soluble in water.
BRN :1722946
Stability :Stable. Combustible. Incompatible with bases, oxidizing agents, reducing agents.
CAS DataBase Reference :498-21-5(CAS DataBase Reference)
NIST Chemistry Reference :Butanedioic acid, methyl-(498-21-5)
EPA Substance Registry System :Butanedioic acid, 2-methyl- (498-21-5)

Symbol(GHS):
Signal word:	Warning
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P 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. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection. P302+P352 IF ON SKIN: wash with plenty of soap and water. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.