| Product: | Weak Acid Blue |
| Colour Index Name: | ACID Blue 80 |
| Class: | 61585 |
| CAS No: | 4474-24-2 |
| Chemical Formulae: | C 32 H28 N2 NA2O8S2 |
| Powder Appearance: | Dark Blue crystalline Powder |
| Colour Strength: | 85 % Dye Content / ABS 0.390/0.002% |
| Solubility at 80° C: | Minimum 50 Grams per Litre |
| Insolubles: | Maximum 0.1 % |
| pH of 1% Solution: | Between 7 and 8 |
| Moisture: | less than 2 % |
| Forbidden Amines: | Less than detectible limits |