| Test | Specification ACS grade |
Specification EP grade |
Specification Regular grade |
|---|---|---|---|
| Physical appearance | White crystals | White, colourless crystals, very deliquescent | White crystals |
| Assay (by titrimetry) | 99.0 % min. | 98.0 to 100.5 % w/w min. | 99.0 % min. |
| Chlorides | 20 ppm max. | 100 ppm max. | - |
| Nitrates | 20 ppm max. | - | - |
| Phosphates | 5 ppm max. | - | - |
| Sulphates | 200 ppm max. | - | - |
| Heavy metals (as Lead) | 20 ppm max. | - | - |
| Substances darkened by H2SO4 |
Passes | - | - |
| Iron | 10 ppm max. | - | - |
| Residue on ignition (Ash) | 300 ppm max | - | - |
| Insoluble matter | 100 ppm max | - | - |
| Appearance of solution | - | Clear colourless | - |
| Solubility | - | Very soluble in water, alcohol and methylene chloride | - |
| Sulphated ash | - | 0.10% max | - |
| Moisture content (by KF) |
- | - | 0.5% w/w max |
TRICHLOROACETIC ACID |
|
