1,4-butynediol

Physical and chemical properties: White orthorhombic system (It will become light yellow with moisture absorption). It is soluble in water, acid solution, ethanol and acetone, sparing soluble in chloroform and not soluble in benzene and diethyl ether. Its solid body is deliquescent easily in the air 25°C, poisonous, has the chemical property as same as binary carbinol and made for additive reaction. Melting point 54-58°CBoiling point 238°C(lit), 145°C(2kPa)Flash point 152°CRefractive index 1.4800Density 1.2Vapour pressure0.1mm Hg(55°C) maxDissolubility in water3740G/L (20°C)BRN1071237Case No. 110-65-6 EINECS 203-788-6Molecular formula C4H6O2Quality Standard (CP/AR/GCS) Guarantee Reagent (GR)Assay ≥99.5% (Enzymology)Ignition reside (Sulphate) ≤0.02%Melting point 54.0-58.0°CSolubility in water Qualified Chemical Purity (CP)Assay ≥999% (Enzymology)Ignition reside (Sulphate) ≤0.1%Melting point 50.0-53.0°CAnalytical Reagent (AR)Assay 98.0% (Enzymology)Ignition reside (Sulphate) ≤0.08%Melting point 52.0-58.0°CApplication: It is mainly used in the production of its down-stream products including polybutylene tetraphthalate (PET), the chain extendor and binding agent of polyurethane, tetrahydrofuran, γ-butyrolactone, N-methylaldehyde pyrrolidone and polyvinyl pyrrolidone, of the raw material of Vitamin B6, and as the brightener in electroplating industry and preservative and inhibitor, etc. Safety caution: It is poisonous and has narcotic function to the upper respiratory tract, eye mucosa and skin. It will cause the pathological changes of nervous centralis and liver function organization if someone have breathed with 0.08-0.1mg/L of it in air. The operating personnel must dress the safety appliances. The equipments must be sealed up. It must have ventilation in the workshops. Please wash it with water at once if you are splashed with it.