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. It smell-less crystal and has a sour taste;melts at 42.4 and boils at 260;has relative density of 1.70(water=1)(pour 1.87),a relative vapor density of 3.38 and a saturation wapor pressure (kpa) 0.67(pour at 25);miscible in water and ethyl alcohol.
|
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 |
Use:
1. Phosphoric Acid technical grade: used for treating activated carton and metal surfaces,feedstock of phosphate,catalyst for organic chemical reactions, and additive of five-proof materials.
2. Food grade phosphate: served as cleaner and acidity in food and during; nutrient for yeast;and feedstock of phosphates.
Packing:
Packed in 35 kg or 330 kg net plastic drums.
Storage:
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.
