Melting point :-132 °C
Boiling point :71-72 °C(lit.)
Density :0.715 g/mL at 25 °C(lit.)
vapor pressure :253 mm Hg ( 37.7 °C)
refractive index :n20/D 1.399(lit.)
Flash point :−6 °F
storage temp. :Store at +2°C to +8°C.
solubility :0.36g/l (experimental)
form :Liquid
Specific Gravity :0.715
color :Clear colorless
Water Solubility :Miscible with organic solvents. Immiscible with water.
BRN :635687
Stability :Stable. Incompatible with strong oxidizing agents. Highly flammable - readily forms explosive mixtures with air.
CAS DataBase Reference :693-02-7(CAS DataBase Reference)
NIST Chemistry Reference :1-Hexyne(693-02-7)
EPA Substance Registry System :1-Hexyne (693-02-7)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501 H304 May be fatal if swallowed and enters airways Aspiration hazard Category 1 Danger H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233 Keep container tightly closed. P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P331 Do NOT induce vomiting.