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Description
This compound appears as yellow-green to black-green crystalline blocks or powder with a metallic luster. It is slightly soluble in water, producing a reddish-purple solution, and is readily soluble in alcohol, yielding a red solution. It turns yellow-brown when mixed with concentrated sulfuric acid and becomes nearly colorless upon dilution. When aqueous solutions are treated with sodium hydroxide, a nearly colorless liquid with a red precipitate is formed. pH: 5–6 (1g/L, H₂O, 20°C). Melting point: 235°C (decomposes).
Specification
| Grade | Analysis |
| Formula | C20H20N3Cl |
| MW | 337.86 |
| CAS | 632-99-5 |
| Appearance | Dark Green Crystalline Powder |
| Identification | To pass tests |
| Loss on drying at 110℃/1hour | ≤10.0% |
| Dye content | ≥88.0% |
| Spectroscopy | 549 nm in 50% ethanol |
| Solubility (0.1% in 50% EtOH) | Clear solution |
| Storage | R.T |
Application
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Used as one of the strongest nuclear stains for chromatin, elastic fibers, and fuchsinophilic granules.
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Applied in histology for nuclear staining of central nervous system tissues.
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Utilized in bacteriology for the identification of Mycobacterium tuberculosis.
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Key component of Schiff's reagent for the detection of aldehydes in analytical chemistry.
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Acts as a redox indicator in titrations involving bromates.
Storage
Store at room temperature.
Documents
Disclaimer: For laboratory research use only.
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