Melting point :13-18 °C
Boiling point :95 °C0.1 mm Hg(lit.)
Density :1.15 g/mL at 25 °C(lit.)
refractive index :n20/D 1.509(lit.)
Flash point :>230 °F
storage temp. :2-8°C
form :Liquid
color :Clear yellow to light brownish
Water Solubility :insoluble
BRN :640626
InChI :1S/C8H10O4/c1-3-11-7-5(9)6(10)8(7)12-4-2/h3-4H2,1-2H3
InChIKey :DFSFLZCLKYZYRD-UHFFFAOYSA-N
SMILES :CCOC1=C(OCC)C(=O)C1=O
CAS DataBase Reference :5231-87-8(CAS DataBase Reference)
NIST Chemistry Reference :3,4-Diethoxy-3-cyclobutene-1,2-dione(5231-87-8)

Symbol(GHS):
Signal word:	Danger
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 H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled Sensitisation, respiratory Category 1 Danger P261, P285, P304+P341, P342+P311,P501 H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:	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.