Properties
Appearance (1), yellow or red brown or black liquid; (2), solid.
Solubility slightly soluble in water to soluble in water. generally, average molecular weight is higher, solubility is smaller. When electrolyte content is greater than 1%, can be salt out easily.
Stability stable.
Risk Solid form: flammable material; irritation, moderate irritation to skin, eye, respiratory. Harmful products of combustion are CO, CO2 and so on. Contact with strong oxidants, can cause to burn.
GHS (Rev.6) label: 
Liquid form: flammable material; irritation, moderate irritation to skin, eye. Harmful products of combustion are CO, CO2 and so on. Contact with strong oxidants, can cause to burn.
GHS (Rev.6) label:
Ecology may be hazardous to environment. Water body should be given special attention.