999-78-0 - Names and Identifiers
999-78-0 - Physico-chemical Properties
Molecular Formula | C7H12
|
Molar Mass | 96.17 |
Density | 0.718 |
Melting Point | -82.4°C |
Boling Point | 83°C |
Flash Point | -10°C |
Water Solubility | Immiscible with water. |
Appearance | liquid |
Color | colorless |
BRN | 1733540 |
Refractive Index | 1.4071 |
Physical and Chemical Properties | NIST Chemical Information 2-Pentyne, 4,4-dimethyl-(999-78-0) |
999-78-0 - Risk and Safety
Risk Codes | 11 - Highly Flammable
|
Safety Description | S9 - Keep container in a well-ventilated place.
S16 - Keep away from sources of ignition.
S33 - Take precautionary measures against static discharges.
|
UN IDs | 3295 |
Hazard Class | 3 |
Packing Group | II |
999-78-0 - Upstream Downstream Industry
999-78-0 - Introduction
4,4-dimethyl-2-pentyne, chemical formula (CH3)2C = C(CH2)3CH3, is also known as 4,4-dimethylpentanediyne or 4,4-dimethylpentyne. The following is a description of the properties, uses, preparation and safety information of the compound:
Nature:
-Appearance: colorless liquid
-Melting point:-14 ° C
-Boiling point: 91-93 ° C
-Density: 0.726 g/mL
-Solubility: Soluble in organic solvents such as ethanol, ether and benzene
Use:
-4,4-dimethyl-2-pentyne can be used as raw materials and intermediates for organic synthesis, and is widely used in the synthesis of drugs and pesticides.
-It can also be used in chemical research, chemical analysis and laboratory synthesis.
Method:
-The common preparation method of 4,4-dimethyl-2-pentyne is through the reaction of phenylacetylene and ethyl halide. First, phenylacetylene and ethyl halide (such as bromoethane) Reflux reaction, under the catalysis of alkali, the substitution reaction occurs, generating 4,4-dimethyl-2-pentyne. After completion of the reaction, a pure product is obtained by an appropriate purification step.
Safety Information:
-4,4-dimethyl-2-pentyne is a flammable liquid with a low flash point.
-use should be careful to avoid contact with skin and eyes, can take safety measures such as wearing chemical protective gloves and goggles.
-During operation and storage, avoid contact with oxidants, strong acids and alkalis to prevent dangerous reactions.
-Use in a well-ventilated environment and avoid operation in a confined space to prevent the risk of explosion due to steam accumulation.
-If taken by mistake or inhaled in an overdose, seek medical attention immediately.
Last Update:2024-04-09 21:01:54