1,5-HEXADIYNE Property

Melting point:

-6°C

Boiling point:

86°C(lit.)

Density 

0,805 g/cm³

refractive index 

1.4400 to 1.4440

Flash point:

-7°C

form 

Liquid

color 

Colorless to Yellow

Water Solubility 

Immiscible with water.

Exposure limits

ACGIH: TWA 1000 ppm
OSHA: TWA 1000 ppm(2950 mg/m3)
NIOSH: IDLH 1500 ppm; TWA 120 ppm(350 mg/m3); Ceiling 610 ppm(1800 mg/m3)

LogP

1.500 (est)

CAS DataBase Reference

628-16-0(CAS DataBase Reference)

EPA Substance Registry System

1,5-Hexadiyne (628-16-0)

Safety

Risk Statements 

12

Safety Statements 

9-16-29-33

RIDADR 

3295

TSCA 

Yes

HS Code 

2901.29.5000

HazardClass 

3

PackingGroup 

II

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H225Highly Flammable liquid and vapour

H304May be fatal if swallowed and enters airways

H315Causes skin irritation

H319Causes serious eye irritation

H336May cause drowsiness or dizziness

H411Toxic to aquatic life with long lasting effects

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P405Store locked up.

1,5-HEXADIYNE Chemical Properties,Usage,Production

Uses

1,5-Hexadiyne is used in the preparation of bisdehydro[12]annulene and biphenylene. It is also used as an important starting material in the preparation of (5Z,9Z)-5,9-hexadecadienoic acid. Further, it is involved in the preparation of linear organotin polymers by reaction with organotin dihydrides.

Definition

ChEBI: Hexa-1,5-diyne is an alkadiyne and a terminal acetylenic compound.