Index (%) | |||||
Solid | Liquid | ||||
Exnt class | First class | Qualified class | First class | Qualified class | |
Sodium cyanide (NaCN)% min. | 98.0 | 94.0 | 87.0 | 30.0 | 30.0 |
Sodium hydroxide (NaOH)% max. | 0.5 | 1.0 | 1.5 | 1.3 | 1.6 |
Sodium carbonate (Na2CO3)% max. | 0.5 | 2.0 | 3.0 | 1.3 | 1.6 |
Water content (H2O)% max. | 0.9 | 2.0 | - | - | - |
Water-insoluble % max. | 0.05 | 0.10 | 0.20 | - | - |
Appearance | White piece-, briquette-or crystal pill-shaped | Colourless or yellowish crystal water solute |