Melting point :>250°C
Boiling point :785.7±60.0 °C(Predicted)
Density :1.58±0.1 g/cm3(Predicted)
solubility :Sparingly soluble in water, ether; soluble in water, ethanol, methanol, amyl alcohol, Hacetone, acetic acid; practically insoluble in chloroform, benzene, petroleum ether
pka :5.31(at 25℃)
form :powder
color :Black-violet
PH Range :Red (4.4) to blue (6.4)
Water Solubility :Slightly soluble in water
λmax :611nm
Major Application :Electrochromic devices, photosensitive materials, parasiticides, hair dyes, cosmetics, ointment for hemorrhoids

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.