... ,for,medicinal gr ItemGB1902-2005 versionBP98 versionChina pharmacopoeia 2000 versionContent(base on C7H5NaO2 dry basis),% 99.099.0-100.599.0Drying ... the stipulationCchloride (base on Cl),500PPm200PPm/Chloride(base on Cl),/300PPm/Heavy metal(base on Pb),10PPm10PPm10PPmAs(base on As),2PPm/5PPmSulfate (base on SO4),1000PPm ...