Molecular Formula | C4H6O2 |
Molar Mass | 86.09 |
Density | 1.2 |
Melting Point | 54 °C |
Boling Point | 238°C(lit.) |
Flash Point | 306°F |
Water Solubility | 3740 g/L (20 ºC) |
Solubility | 3740g/l |
Vapor Presure | <0.1 mm Hg ( 55 °C) |
Appearance | Crystalline Platelets or Flakes |
Color | slightly brown |
Exposure Limit | ACGIH: TWA 0.1 ppm; STEL 0.3 ppmOSHA: TWA 0.75 ppm; STEL 2 ppmNIOSH: IDLH 20 ppm; TWA 0.016 ppm; Ceiling 0.1 ppm |
BRN | 1071237 |
pKa | 12.72±0.10(Predicted) |
PH | 4-7.5 (100g/l, H2O, 23℃) |
Storage Condition | Store below +30°C. |
Stability | Stable. Highly flammable solid. Incompatible with strong oxidizing agents, acid chlorides, acid anhydrides, strong acids, strong bases. |
Refractive Index | 1.4804 |
Physical and Chemical Properties | White orthorhombic crystal (light yellow after moisture absorption) Melting Point: 58 ℃ Boiling Point: 238 ℃,145 ℃(2kPa) flash point 152 ℃ refractive index 1.450 solubility soluble in water, acid solution, ethanol and acetone, slightly soluble in chloroform, insoluble in benzene and ether Other properties of solid butynediol in 25 ° c air deliquescence, toxic, with the chemical properties of the two primary alcohol, but also can be added reaction. |
Use | Used in organic raw materials, solvents, cyanide-free electroplating solution, also used in artificial leather, medicine and pesticide industry |
Risk Codes | R21 - Harmful in contact with skin R23/25 - Toxic by inhalation and if swallowed. R34 - Causes burns R43 - May cause sensitization by skin contact R48/22 - Harmful danger of serious damage to health by prolonged exposure if swallowed. |
Safety Description | S25 - Avoid contact with eyes. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S46 - If swallowed, seek medical advice immediately and show this container or label. |
UN IDs | UN 2716 6.1/PG 3 |
WGK Germany | 2 |
RTECS | ES0525000 |
FLUKA BRAND F CODES | 23-10 |
TSCA | Yes |
HS Code | 29053980 |
Hazard Class | 6.1 |
Packing Group | III |
Toxicity | LD50 orally in Rabbit: 100 mg/kg |
Raw Materials | Calcium carbide Formaldehyde acetylene |
white orthorhombic crystals. Toxic. Soluble in water, acidic solution, ethanol and acetone, insoluble in ether and benzene. Melting Point: 58 °c. Boiling point 238 °c. Flash point 152 °c. Refractive index 450.
using acetylene formaldehyde synthesis method. Acetylene containing 80% ~ 90% is compressed to a pressure of 0.4 ~ 0.5MPa, preheated to 70~80 ℃, and sent to the reactor, with copper butylene as catalyst, and formaldehyde in 110~112 deg C reaction, the crude product. The reaction product is concentrated and refined to obtain the finished product, and at the same time, propargyl alcohol is produced.
can produce a series of raw materials such as butylene glycol, butylene glycol, Tetrahydrofuran, 7L butyrolactone, pyrrolidone, and further can produce synthetic plastics, synthetic fibers (nylon -4), solvent (N-methylpyrrolidone) and preservative. It is a good solvent, which is used as a brightener in the electroplating industry, and can also be used in the pharmaceutical and pesticide industries.