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Product Name:	o-Phenylenediamine
Synonyms:	1,2-Diaminobenzene, 1,2-Phenylenediamine, o-Phenylenediamine, OPD;1,2-Diaminobenzene, 1,2-Phenylenediamine, OPD;1,2-Diaminobenzene, o-Phenylenediamine, OPD;1,2-Fenylendiamin;benzene,1,2-diamino-;benzene-1,2-diamine;diamino-1,2benzene;EK 1700
CAS:	95-54-5
MF:	C6H8N2
MW:	108.14
EINECS:	202-430-6
Product Categories:	VARIOUSAMINE;1,2-Benzenediamine;Organics;Biochemistry;Enzyme;Substrates;Enzyme substrates;Amines;Aromatics;Intermediates & Fine Chemicals;Pharmaceuticals;Biochemicals and Reagents;Building Blocks;Chemical Synthesis;Derivatization agents;Luminescent Compounds/Detection;Nitrogen Compounds;Organic Building Blocks;Polyamines;Fluorescent
Mol File:	95-54-5.mol

o-Phenylenediamine Usage And Synthesis

Phenylenediamine is the simplest aromatic diamine. There are three isomers, namely o-phenylenediamine, m-phenylenediamine and p-phenylenediamine.
p-Phenylenediamine appears as a colorless crystal, being quickly oxidized in the air into black. It has a boiling point of 267 °C. It is soluble in water, ethanol and ether. It can be used as raw materials or intermediates of dyes, vulcanization accelerators for rubber, developers for the photographic industry, fur dyes and hair dyes. People in frequent contact include usually dyeing hair workers, hairdressers and regular hair coloring patients. It can enter the body through the skin, being oxidized intermediates with different degrees of sensitization, being able to cause eczema-like or moss-like dermatitis, appearing mostly in the face, neck and forearm and other skin folds. For example, mouth, eye and nose and other parts are easy to be damaged. People inhalation of its dust can obtain bronchial asthma. The symptoms of oral poisoning are similar as aniline poisoning, being mainly subject to symptomatic treatment.
O-phenylenediamine is also known as 1, 2-diaminobenzene, 1, 2-phenylenediamine. Substance precipitated from the water appears as white to pale yellow leaf-like crystals while product precipitated from chloroform appears as prism-like crystals. Its color is easy to change upon exposure to air, from white to yellow, brown, purple, and finally into black. It has a relative density of 1.2698, the melting point of 103 °C to 104 °C, the boiling point of 256~258 °C. It is slightly soluble in cold water (35 °C 4.15), being easily soluble in hot water (81 °C, 733), ethanol, ether, chloroform and benzene. Its reaction with inorganic acid can lead to the formation of water-soluble salts; its aqueous solution can react with carbon disulfide to generate 2-mercapto-benzimidazole; under pressure, it can react with carbon dioxide reaction to generate benzimidazolone. This product is toxic with inhalation causing visual disturbances. Its contact with the skin can cause inflammation with entering into the eyes being able to cause inflammation as well. Rat oral LD50: 1070mg/kg.
M-phenylenediamine appears as a rhombic crystal, being quickly oxidized to brown color in the air. Its proportion is 1.139 with the melting point of 62.8 °C and the boiling point of 284 °C. It can be dissolved in water, alcohols, and ketones and so on. It can be used in the dye chemical industry, and as a curing agent for plastics. It can also enter into the human body via the respiratory tract, skin and gastrointestinal tract. Acute poisoning can cause methemoglobinemia, and liver damage and hemolytic anemia.

Uses

1. It can be used as a cationic dye intermediates, being the main raw material of pesticides, carbendazim and other fungicides.
2. It can be used as analytical reagent, fluorescent indicator, also used in organic and dye synthesis. It can be used as pesticides, pharmaceuticals and dyes intermediates
3.  As a pesticide intermediates, dye intermediates
phenylenediamine is the intermediate of fungicide carbendazim, methyl thiophanate, and thiabendazole, but also insecticides quinalphos intermediates. In addition, it can also used as an important intermediate of dye industry.
4. The goods are intermediates of dyes, pesticides, additives and photographic materials. Itself is the dye fur yellow brown M. It can be used in the manufacture of polyamide, polyurethane, fungicides carbendazim and thiophanate, reduction scarlet GG, leveling agent, antioxidant MB, also used in the preparation of the developer, surfactant and so on.
5.  It can be used as intermediates of chemical raw materials, pesticides and dyes.