O-phenylenediamine,a colorless monoclinic crystal at room temperature,darkens in air and sunlight.Slightly soluble in cold water,soluble in hot water,easily soluble in ethanol,ether and chloroform.It reacts with inorganic acids to form water-soluble salts.It is the intermediate of dyes,pesticides,auxiliaries,photosensitive materials,etc.It is dye fur yellow brown M.It is used in the manufacture of polyamide,polyurethane,carbendazim and tobuzin,reduced red GG,levelling agent,antioxidant MB,developer,surfactant,etc.

　　ISO common name:0-phey1enediamine diamin

　　Chemical name:1,2-diaminobenzene

　　English Name:1,2-piaminobenzene

　　Technical specification code:784

　　CAS No：95—54—5

　　Molecular formula:c6h8n2

　　Relative molecular weight:108.14(1993 International relative atomic weight)

　　Relative density(20℃):1.14

　　Melting point:102-104℃

　　Boiling point:252-258℃

　　Flash point:1156℃

　　Steam pressure:0.33kpa(100℃)

　　Maximum allowable concentration in air:5mg/m3/P>

　　Coarse product:dark brown granular crystal purity:92%

　　Fine product:white flake whiteness<60 Purity:99.9%

　　Soluble in alcohol,ether,benzene,slightly soluble in water

　　Invasion route:inhalation,ingestion and percutaneous absorption.

　　Health hazard:harmful to the body by inhalation,ingestion or absorption through the skin.It can stimulate the eyes,mucous membrane and respiratory tract.

　　Acute toxicity:LD50 1070mg/kg(rat oral)

　　Mutagenicity:microbial mutagenicity:Salmonella typhimurium 1g/L.

　　Micronucleus test:216mg/kg,24 hours.

　　Hazard characteristics:combustible in case of open fire and high heat.It can react with strong oxidant.Toxic nitrogen oxide fumes are released by thermal decomposition.Combustion(decomposition)products:carbon monoxide,carbon dioxide,nitrogen oxide.

　　Technical standard:the product quality specification conforms to gb-4946-85,and the content is≥99.5%.

　　Appearance:white crystal flake.

　　Packing:50kg inner black plastic bag plus outer woven bag.