tert-Butylacetylene 917-92-0 The top seller CAS NO.917-92-0

Product Name: 3,3-Dimethyl-1-butyne
Synonyms: (CH3)3CCequivCH;3,3,3-Trimethylpropyne;3,3-dimethyl-but-1-yne;3,3-Dimethylbutyne;1-BUTYNE, 3,3-DIMETHYL-;1,2-DIMETHYL-1,4-CYCLOHEXADIENE;3,3-DIMETHYL-1-BUTYNE;3,3-DIMETHYLBUTYNE-1
CAS: 917-92-0
MF: C6H10
MW: 82.14
EINECS: 213-035-3
Product Categories: PHARMACEUTICAL INTERMEDIATES;Acetylenes;Acetylenic Hydrocarbons;Terbinafine
Mol File: 917-92-0.mol
3,3-Dimethyl-1-butyne Structure
3,3-Dimethyl-1-butyne Chemical Properties
Melting point  -78 °C
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.)
Fp  <−30 °F
storage temp.  2-8°C
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

3,3-Dimethyl-1-butyne
【Synonyms】

3,3,3-Trimethylpropyne
3,3-Dimethylbut-1-yne
3,3-Dimethylbutyne
Neohexyne
tert-Butylacetylene
tert-Butylethyne
【CAS】

917-92-0
【Formula】

C6H10
【Molecular Weight】

82.15
【EINECS】

213-035-3
【Beilstein/Gmelin】

1697100
【Beilstein Reference】

4-01-00-01022
Physical and Chemical Properties Back to Contents
【Appearance】

Clear, colorless liquid.
【Solubility in water】

Slightly soluble
【Melting Point】

-78.2
【Boiling Point】

38
【Density】

1.0003 g/cm3 (0 C)
【Refractive Index】

1.44388 (16.8 C)
First Aid Measures Back to Contents
【Ingestion】

If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
【Inhalation】

Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
【Skin】

Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
【Eyes】

Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.
Handling and Storage Back to Contents
【Storage】

Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Flammables-area. Refrigerator/flammables.
【Handling】

Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Ground and bond containers when transferring material. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Hazards Identification Back to Contents
【Inhalation】

May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated. Vapors may cause dizziness or suffocation.
【Skin】

May cause skin irritation. The toxicological properties of this material have not been fully investigated.
【Eyes】

May cause eye irritation. The toxicological properties of this material have not been fully investigated.
【Ingestion】

May cause gastrointestinal irritation with nausea, vomiting and diarrhea. The toxicological properties of this substance have not been fully investigated.
【Hazards】

Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers.
【EC Risk Phrase】

R 12 36/37/38 65
【EC Safety Phrase】

S 16 23 29 33 62
【UN (DOT)】

3295
Exposure Controls/Personal Protection Back to Contents
【Personal Protection】

Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
【Respirators】

Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
【Exposure Effects】

The toxological properties of this substance have not been fully investigated.
Fire Fighting Measures Back to Contents
【Flash Point】

-34
【Fire Fighting】

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Use water spray to keep fire-exposed containers cool. Extremely flammable liquid. Containers may explode in the heat of a fire. Will be easily ignited by heat, sparks or flame. Extinguishing media: Use water spray to cool fire-exposed containers. Water may be ineffective. In case of fire, use water fog, dry chemical, carbon dioxide, or regular foam. Do NOT use straight streams of water.
【Fire Potential】

HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
Accidental Release Measures Back to Contents
【Small spills/leaks】

Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation. A vapor suppressing foam may be used to reduce vapors.
Stability and Reactivity Back to Contents
【Incompatibilities】

Oxidizing agents.
【Stability】

Stable under normal temperatures and pressures.
【Decomposition】

Carbon monoxide, carbon dioxide.
【Combustion Products】

Fire may produce irritating, corrosive and/or toxic gases.
Transport Information Back to Contents
【UN Number】

3295
【Hazard Class】

3
【Packing Group】

I; II; III