Acid Red 9 - AR , CAS No.8003-59-6

CAS: 8003-59-6 Cat. No.: A304673 Formula: C₂₀H₁₃N₂NaO₄S Molecular Weight: 400.38 PubChem CID: 135666569

GRADE & PURITY AR

Synonyms

D92233 | AKOS025310840 | sodium;6-[(2-hydroxynaphthalen-1-yl)diazenyl]naphthalene-1-sulfonate | sodium (E)-6-((2-hydroxynaphthalen-1-yl)diazenyl)naphthalene-1-sulfonate | Acid Red 9 , | Silk Scarlet | 1-Naphthalenesulfonic acid, 6-((2-hydroxy-1-naphthalen

Storage

Room temperature

Shipped In

Normal

Specifications

Synonyms

D92233 | AKOS025310840 | sodium;6-[(2-hydroxynaphthalen-1-yl)diazenyl]naphthalene-1-sulfonate | sodium (E)-6-((2-hydroxynaphthalen-1-yl)diazenyl)naphthalene-1-sulfonate | Acid Red 9 , | Silk Scarlet | 1-Naphthalenesulfonic acid, 6-((2-hydroxy-1-naphthalen

Specifications & Purity

AR

Storage

Room temperature

Shipped In

Normal

Grade

AR

Names and Identifiers

• Pubchem Sid: 504773411
• Pubchem Sid Url: https://pubchem.ncbi.nlm.nih.gov/substance/504773411
• Canonical Smiles: C1=CC=C2C(=C1)C=CC(=C2N=NC3=CC4=C(C=C3)C(=CC=C4)S(=O)(=O)[O-])O.[Na+]
• IUPAC Name: sodium;6-[(2-hydroxynaphthalen-1-yl)diazenyl]naphthalene-1-sulfonate
• InChIKey: GETWKXDZCSCODM-UHFFFAOYSA-M
• INCHI: 1S/C20H14N2O4S.Na/c23-18-11-8-13-4-1-2-6-17(13)20(18)22-21-15-9-10-16-14(12-15)5-3-7-19(16)27(24,25)26;/h1-12,23H,(H,24,25,26);/q;+1/p-1
• Isomeric SMILES: C1=CC=C2C(=C1)C=CC(=C2N=NC3=CC4=C(C=C3)C(=CC=C4)S(=O)(=O)[O-])O.[Na+]
• PubChem CID: 135666569
• Molecular Weight: 400.38

References

1. Turong Shi, Jiachun Feng, Beibei Tang.  (2026)  Synergistic metal-MOF coordination and assisted etching enabled high-flux nanofiltration membrane for superior dye/salt separation.  JOURNAL OF MEMBRANE SCIENCE,      [PMID:] [10.1016/j.memsci.2026.125490]

Frequently Asked Questions

What does AR mean?

AR is a defined analytical purity tier suitable for general analytical and reagent applications. It specifies a minimum assay percentage, controlled limits on common impurities (water, heavy metals, residue on ignition), and lot-to-lot consistency. AR is one of several purity tiers — choose based on the sensitivity and regulatory requirements of your method.

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 8003-59-6, the molecular formula is C20H13N2NaO4S, and the molecular weight is 400.38 g/mol. InChIKey GETWKXDZCSCODM-UHFFFAOYSA-M.

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.