ZINC SULPHATE HEPTAHYDRATE

PRODUCT IDENTIFICATION

CAS NO.

7446-20-0

ZINC SULPHATE

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);

RAW MATERIALS  

CLASSIFICATION

 

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
VAPOR DENSITY  

AUTOIGNITION

 

NFPA RATINGS

Health: 1; Flammability: 0; Reactivity: 0

REFRACTIVE INDEX

 

FLASH POINT Not considered to be a fire hazard
STABILITY Stable under ordinary conditions

APPLICATIONS

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)

TRANSPORTATION

PACKING 25kgs , 50kgs, 1mt in Bag (20mts in contaier)
HAZARD CLASS Not listed on TSCA Inventory
UN NO.  
REMARKS