Melting point :270-272 °C(lit.)
Boiling point :447.81°C (rough estimate)
Density :1.1873 (rough estimate)
refractive index :1.6500 (estimate)
solubility :Chloroform (Slightly, Heated), DMSO (Slightly), Toluene (Very Slightly)
Colour Index :12120
pka :13.45±0.50(Predicted)
Water Solubility :211μg/L at 20℃
Henry's Law Constant :8.2×10⁶ mol/(m³Pa) at 25℃, HSDB (2015)
Stability :Stable. May be moisture sensitive. Incompatible with strong oxidizing agents.
Cosmetics Ingredients Functions :COLORANT
LogP :5.4 at 25℃
CAS DataBase Reference :2425-85-6(CAS DataBase Reference)
IARC :3 (Vol. 57) 1993
NIST Chemistry Reference :2-Naphthalenol, 1-[(4-methyl-2-nitrophenyl)azo]-(2425-85-6)
EPA Substance Registry System :C.I. Pigment Red 3 (2425-85-6)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310 H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
Precautionary statements:	P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P501 Dispose of contents/container to..…