3,3-Dimethyl-1-butyne Chemical Properties

Melting point:

-78 °C (lit.)

Boiling point:

37-38 °C (lit.)

Density 

0.667 g/mL at 25 °C (lit.)

vapor pressure 

7.88 psi ( 20 °C)

refractive index 

n20/D 1.374(lit.)

Flash point:

<−30 °F

storage temp. 

2-8°C

solubility 

Chloroform (Slightly), Methanol (Slightly)

form 

Liquid

color 

Clear colorless

PH

7.51 at 24.8℃ and 10g/L

Water Solubility 

Miscible with chloroform, benzene and toluene. Immiscible with water.

BRN 

1697100

Stability:

Stable, but highly flammable. Readily forms explosive mixtures with air. Note low flash point.

CAS DataBase Reference

917-92-0(CAS DataBase Reference)

NIST Chemistry Reference

1-Butyne, 3,3-dimethyl-(917-92-0)

Safety Information

Hazard Codes 

F+,Xi

Risk Statements 

12-36/37/38

Safety Statements 

3-16-26-33-7/9

RIDADR 

UN 3295 3/PG 2

WGK Germany 

3

HazardClass 

3

PackingGroup 

I

HS Code 

29012990

MSDS

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3,3-Dimethyl-1-butyne Usage And Synthesis

Chemical Properties

colourless liquid

Uses

3,3-Dimethyl-1-butyne is used as an active pharmaceutical intermediate for terbinafine. It is also used in the preparation of 2,2,7,7-tetramethyl-octa-3,5-diyne. Further, it is used in the synthesis of erythro and threo isomers of B-(3,3-dimethyl-1,2-dideuterio-1-butyl)-9-BBN by hydroboration-deuteronolysis-hydroboration sequence.

Synthesis Reference(s)

Tetrahedron Letters, 25, p. 2089, 1984 DOI: 10.1016/S0040-4039(01)81168-0

Hazard

3,3-Dimethyl-1-butyne may cause skin, eye and respiratory irritation; is corrosive to skin and is harmful if ingested (may cause lung damage if inhaled).

3,3-Dimethyl-1-butyne(917-92-0)Related Product Information

• Dimethyl phthalate
• Dimethyl sulfoxide
• Dimethyl sulfide
• 1-Hexyne
• 4-tert-Butylphenol
• 4-tert-Butylcatechol
• ETHANE
• Di-tert-butyl peroxide
• tert-Butyl hydroperoxide
• Dimethyl ether
• 2-Chloro-2-methylpropane
• 2,6-Di-tert-butylphenol
• Tri-tert-butylphosphine
• tert-Butyldimethylsilyl chloride
• Dimethyl fumarate
• 1-BUTYNE
• 3-Methyl butynol
• 2-Butyne-1,4-diol