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 Used as one of the strongest nuclear stains for chromatin, elastic fibers, and fuchsinophilic granules. Applied in histology for nuclear staining of central nervous system tissues. Utilized in bacteriology for the identification of Mycobacterium tuberculosis. Key component of Schiff's reagent for the detection of aldehydes in analytical chemistry. Acts as a redox indicator in titrations involving bromates. Storage Store at room temperature. Documents COA SDS Disclaimer: For laboratory research use only.
