Melting point :-44.8 °C
Boiling point :142-144 °C (lit.)
Density :0.93 g/mL at 25 °C (lit.)
vapor pressure :17.6 mm Hg ( 37.7 °C)
refractive index :n20/D 1.549(lit.)
Flash point :88 °F
storage temp. :Store at +2°C to +8°C.
solubility :H2O: insoluble
pka :19(at 25℃)
form :Liquid
Specific Gravity :0.930
color :Clear colorless to yellow
Water Solubility :INSOLUBLE
Sensitive :Light Sensitive
Merck :14,3861
BRN :605461
Dielectric constant :3.0（20℃）
Stability :Stable. Flammable. Incompatible with strong oxidizing agents, acids, halogens.
CAS DataBase Reference :536-74-3(CAS DataBase Reference)
NIST Chemistry Reference :Phenylacetylene(536-74-3)
EPA Substance Registry System :Phenylacetylene (536-74-3)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H226 Flammable liquid and vapour Flammable liquids Category 3 Warning 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 H350 May cause cancer Carcinogenicity Category 1A, 1B Danger
Precautionary statements:	P202 Do not handle until all safety precautions have been read and understood. P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233 Keep container tightly closed. 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. P308+P313 IF exposed or concerned: Get medical advice/attention.