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Technical Information: White or slightly pink crystalline powder. Bitter in taste, sensation of warmth on tongue, forms water soluble Sodium Salt at 9pH.
Appearance: A colourless crystalline powder
Assay: 98.0% to 102% of C7H7NO2 calculated on the anhydrous basis.
Odour: Almost Odourless
Melting Range: 139 C – 142 C
Infra red absorption: Passes test
Ultraviolet absorption:Passes test
Water: 0.5% (max)
Residue on ignition: 0.05% w/w (max) N.F.XIII/0.1% w/w/U.S.P.
Chromatographic Purity: Complies with U.S.P. test
Organic Volatile Impurities: Complies with U.S.P. test
Solubility:
Soluble in hot water, chloroform and ether.
pH of saturated aqueous solution at 25oC is 5.0.Solubility in water at 30oC is 0.2% at 47oC is 0.8%; Solubility in Glycerol at 5oC is 2.0%; at 39oC is 5%; at 60oC is 10%. Solubility in Propylene Glycol at 5oC is 10%.
Heavy Metals: 0.001% (U.S.P. limit)
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