| Appearance | Clear, Colorless to pale yellow aqueous solution |
| Active content( as acid) % | 60.0 Min. |
| Phosphoric acid( as PO4 3 -)% | 0.6 Max. |
| Phosphorous acid(as PO3 3 -) % | 1.00 Max. |
| Chloride (as Cl - )% | 0.01 Max. |
| PH( 1% water solution) | 1.5-2.0 |
| Ca sequestration MG/G | 500 Min. |
| Density(20ºC) G/cm 3 | 1.4 Min. |
| Fe PPM | 10.0 Max. |
| Colour APHA (Hazen) | 30.0 Max. |
| Appearance | White crystal powder |
| Active content( as acid) % | 90.0 Min. |
| Active content(HEDP·H2O) % | 98.0 Min. |
| Phosphoric acid( as PO4 3 -)% | 0.5 Max. |
| Phosphorous acid(as PO3 3 -) % | 0.8 Max. |
| Chloride (as Cl - )% | 0.01 Max. |
| PH( 1% water solution) | 1.5-2.0 |
| Fe PPM | 5.0 Max. |