Melting point :78-82 °C(lit.)
Boiling point :280 °C(lit.)
Density :0.899 g/mL at 25 °C(lit.)
vapor pressure :6.68 at 25 °C (gas saturation-HPLC/UV spectrophotometry, Sonnefeld et al., 1983)
refractive index :1.6360 (estimate)
Flash point :122°C
storage temp. :room temp
solubility :Soluble in ethanol, ether, and benzene (U.S. EPA, 1985)
form :Solid
color :Yellow
Specific Gravity :0.899
Water Solubility :3.93mg/L(25 ºC)
BRN :774092
Henry's Law Constant :1.14 at 25 °C (gas stripping-UV spectrophotometry, Warner et al., 1987)
Stability :Stable. Incompatible with oxidizing agents.
InChIKey :HXGDTGSAIMULJN-UHFFFAOYSA-N
CAS DataBase Reference :208-96-8(CAS DataBase Reference)
EPA Substance Registry System :Acenaphthylene (208-96-8)

Symbol(GHS):
Signal word:	Warning
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501 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:	P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P301+P312 IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P302+P352 IF ON SKIN: wash with plenty of soap and water. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.