Melting point :-81 °C (lit.)
Boiling point :230 °C (lit.)
Density :0.875 g/mL at 25 °C (lit.)
vapor pressure :<1 mm Hg ( 20 °C)
refractive index :n20/D 1.392(lit.)
Flash point :187 °F
storage temp. :Refrigerator
solubility :Benzene (Slightly), Ethyl Acetate (Slightly), Methanol (Slightly)
form :liquid
Specific Gravity :0.876
color :Colourless
Water Solubility :70.41ng/L at 23℃
Hydrolytic Sensitivity :1: no significant reaction with aqueous systems
Merck :14,3404
Dielectric constant :2.5（20℃）
LogP :9.411 at 25℃
CAS DataBase Reference :141-63-9(CAS DataBase Reference)
EPA Substance Registry System :Pentasiloxane, dodecamethyl- (141-63-9)

Symbol(GHS):
Signal word:	Warning
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes 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. 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. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.