2-Butyne-1,4-diol

Melting point :54 °C
Boiling point :238 °C(lit.)
Density :1.2
bulk density :500kg/m3
vapor pressure :<0.1 mm Hg ( 55 °C)
refractive index :1.4804
Flash point :306 °F
storage temp. :Store below +30°C.
solubility :3740g/l
form :Crystalline Platelets or Flakes
pka :12.72±0.10(Predicted)
color :slightly brown
PH :4-7.5 (100g/l, H2O, 23℃)
Water Solubility :3740 g/L (20 ºC)
BRN :1071237
Henry's Law Constant :2.0×10³ mol/(m³Pa) at 25℃, Altschuh et al. (1999)
Exposure limits :EU LTEL:0.5 mg/m3
Stability :Stable. Highly flammable solid. Incompatible with strong oxidizing agents, acid chlorides, acid anhydrides, strong acids, strong bases.
InChI :1S/C4H6O2/c5-3-1-2-4-6/h5-6H,3-4H2
InChIKey :DLDJFQGPPSQZKI-UHFFFAOYSA-N
SMILES :OCC#CCO
LogP :-0.73 at 25℃
CAS DataBase Reference :110-65-6(CAS DataBase Reference)
NIST Chemistry Reference :2-Butyne-1,4-diol(110-65-6)
EPA Substance Registry System :2-Butyne-1,4-diol (110-65-6)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes 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 H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501 H370 Causes damage to organs Specific target organ toxicity, single exposure Category 1 Danger P260, P264, P270, P307+P311, P321,P405, P501 H372 Causes damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 1 Danger P260, P264, P270, P314, P501 H402 Harmful to aquatic life Hazardous to the aquatic environment, acute hazard Category 3
Precautionary statements:	P260 Do not breathe dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P333+P313 IF SKIN irritation or rash occurs: Get medical advice/attention. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P405 Store locked up. P501 Dispose of contents/container to..…