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Nuclear Fast Red, an anthraquinone dye, is commonly used in conjunction with an excess of aluminum ions as a red nuclear counterstain. Light purple on sodium hydroxide, brown in sulfuric acid solution. Soluble in ethanol and water. Maximum absorption wavelength 518nm. Irritating. It can be used for nucleus staining of connective tissue and determination of calcium in serum.
| Molecular Weight | 357.27 |
| Formula | C14H8NNaO7S |
| CAS Number | 6409-77-4 |
| Solubility (25°C) | Water ~4 mg/mL |
| Storage | Store in a cool, protect from light |
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