GRADE & PURITYBiological Stain?Biological stain grade — dyes characterized for staining cells and tissues. Use in histology and microscopy where staining consistency matters.
Synonyms
Naphthionic Red A | C.I. Food Red 4 | disodium;6-hydroxy-5-[(4-sulonatonaphthalen-1-yl)diazenyl]naphthalene-2-sulonate | Acilan Red E | HD Fast Red E Supra | Sodium 4-((2-hydroxy-6-sulfonatonaphthalen-1-yl)diazenyl)naphthalene-1-sulfonate | Cilefa Red E |
Biological stain Biological Stain for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
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Storage & shipping
Room temperature Ships Normal Check lot-specific COA for exact specifications.
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Quality documents
SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.
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Literature proof
Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
Specifications
Synonymes
Naphthionic Red A | C.I. Food Red 4 | disodium;6-hydroxy-5-[(4-sulonatonaphthalen-1-yl)diazenyl]naphthalene-2-sulonate | Acilan Red E | HD Fast Red E Supra | Sodium 4-((2-hydroxy-6-sulfonatonaphthalen-1-yl)diazenyl)naphthalene-1-sulfonate | Cilefa Red E |
This compound belongs to the class of organic compounds known as 1,1'-azonaphthalenes. These are organonitrogen aromatic compounds that contain a central azo group, where each nitrogen atom is conjugated to the 1-position of a naphthalene ring system. Naphthalene is a compound made up of two fused benzene rings.
External Descriptors
Not available
1. Djoumbou Feunang Y, Eisner R, Knox C, Chepelev L, Hastings J, Owen G, Fahy E, Steinbeck C, Subramanian S, Bolton E, Greiner R, and Wishart DS. ClassyFire: Automated Chemical Classification With A Comprehensive, Computable Taxonomy. Journal of Cheminformatics, 2016, 8:61.
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Foire aux questions
What does Biological Stain mean?
Biological Stain indicates that the product has been processed and tested for biological and biochemical applications. Specifications may include endotoxin limits, microbial controls, sterility, low DNase/RNase/protease activity, and verified biological activity where relevant.
How should this product be stored?
Store at room temperature.
How is this product shipped?
This product ships under standard ambient conditions. No temperature-controlled packaging is required.
What are the CAS number, molecular formula and molecular weight?
The CAS Number is 2302-96-7, the molecular formula is C20H12N2Na2O7S2, and the molecular weight is 502.42 g/mol. InChIKey YCDHVKWTZBVDKD-UHFFFAOYSA-L.
What documentation is provided?
Available product documentation, including Certificates of Analysis (COA), Safety Data Sheets (SDS), and specification sheets, is shown in the product document area. Document availability and access follow the current site policy.
Need help choosing the grade?
Our grade selection guide covers purity, stabilizer status, and application suitability for all variants in our catalog.
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