|
PRODUCT IDENTIFICATION
|
|
CAS NO.
|
7446-20-0
|
|
|
EINECS NO.
|
231-793-3
|
|
FORMULA
|
ZnSO4.7H2O
|
|
MOL WT.
|
287.55
|
|
H.S. CODE
|
2833.26
|
|
TOXICITY
|
Oral rat LD50: 2150 mg/kg
|
|
SYNONYMS
|
Sulfuric acid, zinc salt (1:1), heptahydrate; White vitriol;
|
|
Zinc sulfate (1:1) heptahydrate; Zinc sulfate heptahydrate; Zinc vitriol (heptahydrate);
|
|
|
|
|
|
|
|
GENERAL DESCRIPTION
|
|
Zinc Sulfate (also spelled zinc sulphate) is a very water soluble, clear, crystalline compound prepared by heating zinc sulphide ore in air and dissolving out and recrystallizing the sulphate. It is commonly used as the heptahydrate form; it occurs naturally as the mineral goslarite, and can be prepared by reacting zinc with sulfuric acid.
The crystalline sulfate is known commonly as white vitriol. It loses water at 30°C to give the hexahydrate and more water is lost at 70°C to form the monohydrate. The anhydrous salt forms at 280°C and this decomposes above 500°C.
It is used in agriculture as a weed killer and to give protection against pests; It is used to supply zinc in animal feeds and fertilizers; It is also an important constituent of the precipitating bath in the manufacture of viscose rayon and in electrolyte for zinc plating; It functions as a mordant in dyeing; as a preservative for skins and leather; and as an astringent and emitic in medicine.
|
|
PHYSICAL AND CHEMICAL PROPERTIES
|
|
PHYSICAL STATE
|
White Crystalline powder or Granular
|
|
MELTING POINT
|
100 C
|
|
BOILING POINT
|
500 C (Decomposes)
|
|
SPECIFIC GRAVITY
|
1.97
|
|
SOLUBILITY IN WATER
|
54g/10ml at 20 C
|
|
pH
|
5 - 7
|
|
|
|
|
|
|
|
NFPA RATINGS
|
Health: 1; Flammability: 0; Reactivity: 0
|
|
|
|
|
FLASH POINT
|
Not considered to be a fire hazard
|
|
STABILITY
|
Stable under ordinary conditions
|
|
|
|
Production of Ryon fibre, Micronutrient in fertilisers , Agriculture, Production of paint and varnishes, glues, Titane Dioxide, Zinc Sterate and Zinc-Alkyl-di-thiocarbamate (Fungicide), Rubber As accelerator, flotation of ores, Electroplating and surface treatment, Animal feed.
|
|
SALES SPECIFICATION
|
|
APPEARANCE
|
White Crystalline powder or Granular
|
|
PURITY
|
98.0%min
|
|
Zn
|
22.0% min
|
|
WATER INSOLUBLES
|
0.1% max
|
|
Mg
|
0.5% max
|
|
Cu
|
0.1% max
|
|
Ca
|
0.1% max
|
|
As
|
10ppm max
|
|
Pb
|
5ppm max
|
|
PARTICLE SIZE
|
60 - 100mesh (Powder) , 10-50mesh (Granular)
|
|
|
|
PACKING
|
25kgs, 1mt in Bag (20mts in contaier)
|
|
HAZARD CLASS
|
Not listed on TSCA Inventory
|
