1、Chemical Name: Zinc Sulfate
2、Molecular Formula: ZnSO4·H2O ; ZnSO4·7H2O
3、Molecular Weight: Monohydrate: 179.49 ; Heptahydrate: 287.58
4、CAS: Monohydrate: 7446-19-7 ; Heptahydrate: 7446-20-0
5、Character: It is colorless transparent prismatic or small spicules or granular crystalline powder, odorless, heptahydrate relative density 1.957g/cm3, melting point 100℃, easily soluble in water, aqueous solution is acidic to litmus. Slightly soluble in ethanol and glycerol. Monohydrate loses water at temperatures above 238℃. Heptahydrate gradually weathered in dry air at room temperature.
6、Usage: It is used as nutritional supplement(zinc fortifier) and processing aid. It’s used in milk product, infant food, liquid and milk drinks, grain and its’ products, table salt, soft drinks, maternal formula and coco powder and other flavor nutritional solid drinks.
7、Packing: It is packed with polyethylene bag as inner layer, and a compound plastic woven bag as outer layer. The net weight of each bag is 25kg.
8、Storage and Transport: It should be stored in a dry and ventilative warehouse, kept away from heat and moisture during transportation, unloaded with care so as to avoid damage. Furthermore, it must be stored separately from poisonous substances.
| 质量指标 | Specification | GB25579-2010 | FCC VII | ||
| 含量 w/% | ZnSO4·H2O | Content,w/% | ZnSO4·H2O | 99.0-100.5 | 98.0-100.5 |
| ZnSO4·7H2O | ZnSO4·7H2O | 99.0-108.7 | 99.0-108.7 | ||
| 砷（As），mg/kg ≤ | Arsenic(As),mg/kg ≤ | 3.0 | ———— | ||
| 碱金属和碱土金属盐，w/% ≤ | Alkali and Alkaline Earths,w/% ≤ | 0.50 | 0.50 | ||
| 酸度 | Acidity, | 通过试验 | Passes test | ||
| 硒（Se），mg/kg ≤ | Selenium(Se),mg/kg ≤ | 30.0 | 30.0 | ||
| 汞（Hg），mg/kg ≤ | Mercury(Hg),mg/kg ≤ | 1.0 | 5.0 | ||
| 铅（Pb），mg/kg ≤ | Lead(Pb),mg/kg ≤ | 4.0 | 4.0 | ||
| 镉（Cd），mg/kg ≤ | Cadmium(Cd),mg/kg ≤ | 2.0 | 2.0 | ||
