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Phosphonic acid
Index:GB/T1282-1996 and food GB3149-92
Molecular formula :H3PO4
Molecular weight:98.00
Properties:Colorless, odorless transparent sticky liquid.
When placed in the cold environment for a long time, it will
become columnar crystal .soluble in water and alcohol with
giving off heat. .
Melting point:42.35 .Density:1.69
Warning:This product is irritative. If there is any contact
with eyes, use water to wash then ask help from a doctor.
Stored after being sealed, avoid to sunshine.
Use: Mainly used in the detection of mercury, gold and silver,
lead, iodine acid, usually applied in the manufacture of phosphite
as acidity regulator .
Packing:500milliliter/glass bottle ,35kg/plastic pail.
Technical index:
| Item |
Top grade pure |
Analytically pure |
Chemical Pure |
Food grade |
Content  |
85.0% |
85.0% |
85.0% |
85.0% |
Chroma  |
10 |
25 |
25 |
20 |
| Ignition residue |
0.1% |
0.2% |
0.5% |
-- |
| Volatile acid (According to H+)mmol/100g
|
0.02% |
0.02% |
0.02% |
-- |
| Chloride (CL) |
0.0002% |
0.0003% |
0.0005% |
0.0005% |
| Sulfate (SO4) |
0.001% |
0.003% |
0.01% |
0.005% |
| Nitrate (NO3) |
0.0003 |
0.0005% |
0.0005% |
-- |
| Arsenic (As) |
0.0001% |
0.0001% |
0.0005% |
0.0001% |
| Iron(Fe) |
0.001% |
0.002% |
0.002% |
-- |
| Na |
0.05% |
-- |
-- |
-- |
| K |
0.005% |
-- |
-- |
-- |
| Mn |
0.0002% |
0.0002% |
0.0005% |
-- |
| Ni |
0.0005% |
-- |
-- |
-- |
| Cu |
0.0005% |
-- |
-- |
-- |
| Zn |
0.001% |
-- |
-- |
-- |
| Cd |
0.0005% |
-- |
-- |
-- |
| Pb |
0.0005% |
-- |
-- |
-- |
| Heavy metal(according to pb ) |
-- |
0.001% |
0.001% |
0.001% |
| Reduced substance (According to H3PO3) |
0.005% |
0.01% |
0.05% |
0.012% |
| Fluorin (According to F) |
-- |
-- |
-- |
0.001% |
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