Melting point :-18 °C
Boiling point :95-98 °C/19 mmHg (lit.)
Density :1.156 g/mL at 25 °C (lit.)
refractive index :n20/D 1.447(lit.)
Flash point :187 °F
storage temp. :Keep in dark place,Sealed in dry,Room Temperature
form :Liquid
color :Colorless to pale yellow
Water Solubility :Soluble in most organic solvents. Insoluble in water.
Sensitive :Light Sensitive
BRN :607063
InChIKey :VHILMKFSCRWWIJ-UHFFFAOYSA-N
CAS DataBase Reference :762-42-5(CAS DataBase Reference)
NIST Chemistry Reference :2-Butynedioic acid, dimethyl ester(762-42-5)
EPA Substance Registry System :2-Butynedioic acid, dimethyl ester (762-42-5)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, 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
Precautionary statements:	P270 Do not eat, drink or smoke when using this product. 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.