| Product Name: |
Phosphorus acid |
  |
| Phosphonic acid | ||
| Orthophosphorous acid | ||
| Acido fosforoso | ||
| Phosphorus acid | ||
| CAS NO.: | 13598-36-2 | |
| EC NO.: | 237-066-7 | |
| Structural formula: | H3PO3 | |
| Molecular weight: | 82.0 | |
| Characteristics: | Colourless crystals, no odour  |
|
| Specifications: | 98.5% min with Fe 50 ppm max; 99% min with Fe 10 ppm, 20 ppm max.Other details upon request. | |
| Packing: | 25kg or 500kg, or 1000kg net p.p. woven bags，with 2-ply plastic bags inside. | |
| Application: | Phosphorous acid is usually used as a reducing agent and pesticide intermediate. It can also be used in the manufacture of nylon whitening agent, stabilizer for plastics, synthetic fiber, Phosphites, Glyphosate, water treatment agent, etc. |
|
Items |
Excellent grade |
First grade |
Qualified grade |
|
Characteristics: |
White crystals, no odour |
White crystals, no odour |
White crystals, no odour |
|
Assay (H3PO3): |
99.0% min |
99.0% min |
98.5% min |
|
Iron (Fe): |
10 ppm max |
20 ppm max |
50 ppm max |
|
Chloride (Cl): |
0.1% max |
0.006% max |
0.01% max |
|
Sulphate (SO4): |
0.006% max |
0.006% max |
0.006% max |
|
Phosphate (PO4): |
0.1% max |
0.2% max |
0.2% max |
|
Plumbum (Pb): |
5 ppm max |
10 ppm max |
10 ppm max |
|
Arsenic (As): |
10 ppm max |
Not regulated. |
Not regulated. |
|
70% water solution: |
Clear and colorless. APHA 20 max |
Clear and colorless |
Clear and colorless |
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