Appearance White to off-white powder Conforms Identification IR,H1-NMR Conforms Water ≤1.0% 0.2% Residue on ignition ≤0.5% 0.1% Meting point 186~189℃ 186.5~188.6 ℃ Heavy metals ≤20 ppm Conforms Related substance Total impurities ≤1.0% 0.3% Single impurities ≤0.5% 0.02%
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