ortho-tolidine
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ortho-tolidine
[¦ȯr·thō ′täl·ə‚dēn] (organic chemistry)
[C6H3(CH3)NH2] Light-sensitive, combustible white to reddish crystals soluble in alcohol and ether, slightly soluble in water, melts at 130°C; used as an anlytical reagent and a curing agent for urethane resins.