| Chemical Name | Naphthoquinone-(1,2)-diazide-(2)-sulfonic acid-(5)-sodium salt, monohydrate |
| CAS number | 2657-00-3 (water free) |
| Molecular Weight | 290 |
| Molecular Formula | C10 H5N2O4S Na x H2O |
| Aspect | Orange Solid |
| Purity (UV absorption) | 95 % minimum |
| Solubility (@20°C) | 11% minimum in water |
| Water | 7% maximum |
| Metals (atomic absorption) | less than 100 ppm |
| Sodium Sulphate | less than 1% |
| Sodium Chloride | less than 1.5% |
| Loss on drying | less than 1% |
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