Executive Standard :GB2091-2008
Chemical Formula :H3PO4
| NO. | Items | Standard | Internal Standards |
| 1 | Phosphorus Pentoxide (H3PO4) w/%≥ | 85.0 | 85.0 |
| 2 | Chloride (CI) w/% ≤ | 0.0005 | ＜0.0005 |
| 3 | Sulphate（SO4）w/%≤ | 0.01 | ＜0.01 |
| 4 | Iron（Fe) w/%≤ | 0.005 | ＜0.005 |
| 5 | Arsenic（As）w/% ≤ | 0.01 | ＜0.01 |
| 6 | Heavy Metal（Pb）w/% ≤ | 0.005 | ＜0.005 |
Application Filed :
1. PA 85% is used for metal surface to avoid metal rust.
2. Mixed with Nitric Acid as a chemical polishing agent to improve the surface perfection of metals.
3.The raw material of detergents, insecticides.
4.The raw material of phosphorus fire retardants.
