Citricacid, zinc salt (2:3) (8CI) Zinc citrate (Zn3(C6H5O7)2) (7CI) USP
质量指标 | Specification | GB 1903.49-2020 | USP40 | |
Anhydrous,Dihydrate | Trihydrate | |||
含量(Zn3(C6H5O7)2·3H2O),w/% ≥ | Content(Zn3(C6H5O7)2·3H2O),
w/% ≥ |
———— | 99.0-103.0 | ———— |
含量Zn(以干基计),w/% ≥ | Content Zn (On dry basis),w/% ≥ | 31.3 | ———— | 31.3 |
溶解度(25℃)/(g/100ml) | Solubility(25℃)/(g/100ml) | ———— | 3.60 | ———— |
盐酸不溶物,w/% ≤ | Hydrochloric acid insoluble,w/%≤ | ———— | 0.1 | ———— |
干燥失重,w/% ≤ | Loss on drying,w/% ≤ | 1.0 | 1.0(Anhydrous) | |
氯化物(Cl),w/% ≤ | Chloride (Cl),w/% ≤ | 0.05 | 0.05 | |
硫酸盐(SO4), w/% ≤ | Sulfates (SO4),w/% ≤ | 0.05 | 0.05 | |
溶液澄清度 | Solution clarity | ———— | 合格 | ———— |
铁(Fe),mg/kg ≤ | Iron(Fe),mg/kg ≤ | 50 | ———— | |
铅(Pb),mg/kg ≤ | Lead (Pb),mg/kg ≤ | 5.0 | 10.0 | |
总砷(As),mg/kg ≤ | Arsenic (As) ,mg/kg ≤ | 2.0 | 3.0 | |
镉(Cd),mg/kg ≤ | Cadmium (Cd),mg/kg ≤ | 5.0 | 5.0 | |
干燥温度和时间分别为105℃±2℃和2h |
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