质量指标:含量98.5%~101.5%比旋度-74.0~-77.0PH值5.0~6.0透光度≥95.0%氯化物≤0.020%硫酸盐≤0.020%铵盐≤0.020%重金属≤0.001%铁盐≤0.001%砷盐≤0.0001%干燥失重≤0.2%灼烧残渣≤0.1%