Technical aspects
The product has a high purity, in accordance with food standards. It is odourless, highly soluble in water and has low levels of heavy metal contamination.
| Parameter | Value |
| Appearance | White or almost white powder/crystals |
| Taste and smell | Odourless, strongly acidic taste |
| Water content | Max. 8.8% |
| Purity (assay) | 99.5–100.5% |
| Sulphates | Max. 150 ppm |
| Roasting residue | Max. 0.5% |
| Oxalates | Max. 100 ppm |
| Chlorides | Max. 50 ppm |
| Calcium | Max. 20 ppm |
| Heavy metals (Pb, Hg, As, Al) | Pb ≤ 0.5 ppm, As ≤ 1 ppm, Hg ≤ 1 ppm, Al ≤ 0.2 ppm |
| Bacterial endotoxins | < 0.5 IU/mg |
