Melting point :27-28°C
Boiling point :122-123 °C/10 mmHg (lit.)
Density :1.125 g/mL at 25 °C (lit.)
refractive index :n20/D 1.454(lit.)
Flash point :>230 °F
storage temp. :Sealed in dry,Room Temperature
solubility :soluble in Chloroform, Methanol, Toluene
form :powder to lump to clear liquid
color :White or colorless to Brown
FreezingPoint :23.0 to 26.0 ℃
CAS DataBase Reference :1573-17-7(CAS DataBase Reference)
EPA Substance Registry System :2-Butyne-1,4-diol, diacetate (1573-17-7)

Symbol(GHS):
Signal word:	Warning
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 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. 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. 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.