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| | 2-Butyne Basic information |
| | 2-Butyne Chemical Properties |
| Melting point | -32 °C | | Boiling point | 27 °C(lit.) | | density | 0.691 g/mL at 25 °C(lit.) | | vapor pressure | 11.47 psi ( 20 °C) | | refractive index | n20/D 1.393(lit.) | | Fp | -25 °C | | storage temp. | 2-8°C | | form | Liquid | | Specific Gravity | 0.691 | | color | Clear colorless to light yellow | | Water Solubility | Not miscible in water. | | BRN | 1361340 | | CAS DataBase Reference | 503-17-3(CAS DataBase Reference) | | EPA Substance Registry System | 2-Butyne (503-17-3) |
| Hazard Codes | F+,Xi | | Risk Statements | 12-36/37/38 | | Safety Statements | 16-26-36 | | RIDADR | UN 1144 3/PG 1 | | WGK Germany | 3 | | RTECS | GQ7210000 | | TSCA | Yes | | HazardClass | 3 | | PackingGroup | I | | HS Code | 29012990 |
| | 2-Butyne Usage And Synthesis |
| Chemical Properties | clear colorless to light yellow liquid | | Uses | 2-Butyne is used to synthesize alkylated hydroquinones in the total synthesis of Vitamin E. It is also used as pharmaceutical intermediates. | | General Description | A clear colorless liquid with a petroleum-like odor. Flash point below -4°F. Boiling point 81°F. Less dense than water and insoluble in water. Vapors heavier than air. | | Air & Water Reactions | Highly flammable. Insoluble in water. | | Reactivity Profile | 2-Butyne may react vigorously with strong oxidizing agents. May react exothermically with reducing agents to release hydrogen gas. In the presence of various catalysts (such as acids) or initiators, may undergo exothermic addition polymerization reactions. | | Hazard | Flammable, dangerous fire risk. Moderate
explosion hazard. | | Health Hazard | Inhalation or contact with material may irritate or burn skin and eyes. Fire may produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution. | | Safety Profile | A simple asphyxiant.
Very dangerous fire hazard when exposed to
heat or flame; can react with oxidzing
materials. Moderately explosive in the form
of vapor when exposed to heat or flame. To
fight fire, use foam, CO2, dry chemicals. See
also ACETYLENE COMPOUNDS and
ARGON (for a description of simple
asphyxiants). | | Purification Methods | Stand it over sodium for 24hours, then fractionally distil it under reduced pressure into a cooled receiver. [Beilstein 1 IV 971.] |
| | 2-Butyne Preparation Products And Raw materials |
| Raw materials | HQLKAXZWNFIYPU-UHFFFAOYSA-N-->Benzene, 1-methoxy-2-(1-propynyl)--->1,2,3-Butatriene-->Benzene, 1-Methoxy-4-(1-propyn-1-yl)--->Phenol, 4-(1-propynyl)- (9CI)-->1,2-BUTADIENE-->Benzene, 1,1'-(1,2-ethynediyl)bis[2-methoxy--->Lincomycin 2,7-diacetate-->METHYLENECYCLOPROPANE; >98%DISCONTINUED-->2-PENTYNE-->1-Methylcyclopropene | | Preparation Products | SODIUM TETRAETHYLBORATE-->2,3,4,5-TETRAMETHYL-2-CYCLOPENTENONE-->(Z)-2-CHLORO-2-BUTENE-->1-BUTYNE-->Pentamethylbenzene |
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