Melting point :212 °C
Boiling point :30-80 °C
Density :1.06 g/mL at 25 °C
Tg :100
Tg :35
refractive index :n20/D 1.5916
Flash point :>230 °F
storage temp. :2-8°C
solubility :Chloroform (Slightly, Sonicated)
form :powder
color :White
Water Solubility :insoluble
Dielectric constant :24.0（Ambient）
Stability :Stable. Combustible. Incompatible with strong oxidizing agents.
InChIKey :ZJMWRROPUADPEA-UHFFFAOYSA-N
Surface tension :40.7mN/m at 20°C
CAS DataBase Reference :9003-53-6
IARC :3 (Vol. 19, Sup 7) 1987
NIST Chemistry Reference :Polystyrene(9003-53-6)
EPA Substance Registry System :Polystyrene (9003-53-6)

Symbol(GHS):
Signal word:	Warning
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 H332 Harmful if inhaled Acute toxicity,inhalation Category 4 Warning P261, P271, P304+P340, P312 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. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection. P302+P352 IF ON SKIN: wash with plenty of soap and water. P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P312 Call a POISON CENTER or doctor/physician if you feel unwell. P321 Specific treatment (see … on this label). P332+P313 IF SKIN irritation occurs: Get medical advice/attention. P362 Take off contaminated clothing and wash before reuse.