Properties: White to slightly red crystals; darkens on exposure to air. mp 145-147°. bp 267°. Sol in 100 parts cold water; sol in alcohol, chloroform, ether. A black color is developed with 3% H2O2; brown with 5% FeCl3 soln. Keep well closed and protected from light. LD50 in rats (mg/kg): 80 orally, 37 i.p. (Burnett).
Melting point: mp 145-147°
Boiling point: bp 267°
Toxicity data: LD50 in rats (mg/kg): 80 orally, 37 i.p. (Burnett)
Derivative Type: Hydrochloride
Properties: White to slightly reddish crystals. Freely sol in water, slightly in alcohol, ether.
CAUTION: Potential symptoms of overexposure are irritation of pharynx and larynx; bronchial asthma; sensitization dermatitis. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 248.
Use: Dyeing furs; also in photochemical measurements, accelerating vulcanization; manuf azo dyes, etc. The hydrochloride as reagent for blood, H2S, amyl alcohol; in testing of milk.
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