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Phosphoric Acid

addtime:2010-4-27  from:   Reads:3491

Phosphoric Acid
Molecular Formula: H3PO4
Molecular weight: 97.99
Standards: GB2091-92 (technical grade) GB3149-92 (food grade)
Properties:
it is in Colorless, transparent and syrupy liquid or rhombic crystalline; It is odorless and tastes very sour; its melting point is 42.35
and when heated to 300 it will become into meta phosphoric acid; its relative density is 1.834; it is easily soluble in water and resolves in ethanol; it may irritate human skin to cause phlogosis and destroy the issue of human body; it shows corrosiveness being heated in ceramic vessels; it has got hydroscopicity.
Use:
Technical grade phosphoric acid may be used to produce variety of phosphates, electrolyte treatment liquids or chemical treatment liquids, refractory mortar with phosphoric acid and inorganic coheretant. It is also used as a catalyst, drying agent and cleaner. In coating industry it is used as a rust-proof coating for metals; As a acidity regulator and nutrition agent for yeast food grade phosphoric acid may be applied to flavors, canned food and light drinks as well as used in wine brewery as a nutrients source for yeast to prevent the reproduction of useless bacteria.
Packing & Storage:
Packed in 35 kg or 330 kg net plastic drums.
During transportation or storage, the inner cover as well as the outer cover of the packing drums must be well sealed. It is classified as a hazardous product of the 2nd class of risk, and its hazardous chemicals code in China is 93002; It is easily frozen in winter season.
Specifications:
Sr. No.
Index
Tech. Grade
Food Grade
1
Appearance
Colorless, transparent syrupy liquid or in very light color
2
Colour
30
20
3
Assay (as H3PO4 )% ≥
85.0
85.0
4
Chloride(as Cl -) %
0.0005
0.0005
5
Sulphats(asSO42- )%
0.003
0.005
6
Iron (Fe)%
0.002
 
7
Arsenic (As)%
0.005
0.0001
8
Heavy metals(as Pb)%
0.001
0.001
9
Oxidable matter (asH3PO4)%
 
0.012
10
Fluoride (as F)%
 
0.001

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