| Appearance (Color): | Green to Very Dark Green and Brown to Very Dark Brown |
| Appearance (Form): | Powder or Crystals |
| Emperical formula: | C27H29N2NaO7S2 |
| Molecular Formula | 580.65 |
| Lambda Max: | 554 Nm |
| Product Name | Acid Red 52 |
| Colour Index No. | 45100 |
| CAS NO. | 3520-42-1 |
| Chemical Class: | XANTHENE |
| Dye strength: | 650% - 660 % |
| Extinction coefficient: | < 85000 |
| Infra red spectrum: | 554-560 |
| Purity by HPLC: | 92%-93% |
| Insolubles: | Less than 0.1% |
| Solubility: | Clear solution @ 15- 16 % @ 25 deg C |
| PH: | Acidic 0.9-1.4 |
| Bulk density: | 0.6 |
| Chromium Level : | Maximum 10 ppm |
| Lead Level | Maximum 2 ppm |
| Mercury Level | Maximum 1 ppm |
| Forbidden Amines | Should not be detected |