Heptahydrate

Product name: heptahydrate CAS No.:7446-20-0 MF:ZnSO4.7H2O Package:25kg/50kg in wove bag

Product name: Heptahydrate

Product description:

A,) molecular formula: ZnSO4 · 7 h2o

B), the molecular weight of 287.54

C),performance and use: heptahydrate (ZnSO4 · 7 h2o), also known as white vitriol, zinc aluminum, character, colorless acicular crystals or powder crystal. Density 1.957 g/cm3. Melting point 100 °C. Soluble in water, slightly soluble in ethanol, glycerol. Dry air gradually weathering. 39 °C losing a molecular crystal water, 280 °C losing all the water of crystallization, become anhydride. Heating to 767 °C, down into zinc oxide and sulfur trioxide. Appearance: white or microstrip yellow crystal Heptahydrate is mainly manufacturing lithopone, zinc salt of raw materials, YinRanYe of mordant, wood, leather preservation agent, prevent fruit tree plant diseases and insect pests of pesticides, medicine emetic, collagen clarification, preservatives, is also the important auxiliary raw material production of chemical fiber. In addition, also used in electroplating, electrolysis and paper industry. Need to keep airtight in a dry place.

D). Production process: by zinc oxide to join dilute solution tuning into slurry, join sulfuric acid reaction, the filter, add zinc powder to copper, cadmium, nickel and displacement out, filtering, filtrate heating, add potassium permanganate, iron, manganese impurities such as oxidation, filtration, clarification, concentration, cooling crystallization, centrifugal separation, drying system.

E), implement standard: industrial zinc sulfate standards: HG/T 2326-2005

F),Execution standard :HG/T2326-2005

ITEM	Indicators
	I( technical grade zinc sulphate monohydrate )			II (industrial-strength heptahydrate )
	high-class	first glass	qualifid product	high-class	first glass	qualifid product
With Zn meter quality scores ,% ≥	35.7	35.34	34.61	22.51	22.06	20.92
The main content to (ZnSO4 · H2O) meter quality scores ,% ≥	98.0	97	95	--	--	--
To (ZnSO4 · 7 h2o) meter quality scores ,% ≥	——	——	——	99.0	97.0	92.0
Insolubles quality scores ,% ≤	0.020	0.050	0.10	0.020	0.050	0.10
PH value (50 g/L solution) ≥	4.0	4.0	——	3.0	3.0	——
Chloride (in Cl meter) mass fraction ,% ≤	0.20	0.60	——	0.20	0.60	——
(Pb),%≤	0.002	0.007	0.010	0.001	0.010	0.010
(Fe),%≤	0.008	0.020	0.060	0.003	0.020	0.060
(Mn),%≤	0.01	0.03	0.05	0.005	0.10	——
(Cd),%≤	0.002	0.007	0.010	0.001	0.010	——

G).Package:25kg/bag 50kg/bag

H).Contact:

Qingdao Salus International Trade Co.,LtdAdd:B1507 Art&Technology Space,No.63 Haier Road,Qingdao,ChinaTel:+86-532-80938486Fax:+86-532-80990580     

Heptahydrate