Sodium anthraquinone-2-sulfonate
Sodium anthraquinone-2-sulfonate (CAS: 131-08-8) is a significant organic compound with the molecular formula C14H7NaO5S and a molecular weight of 310.26 g/mol. This anthraquinone derivative serves as a valuable building block in chemical synthesis. It is widely employed as an intermediate in the production of dyes and pigments, owing to its chromophoric anthraquinone structure and the presence of a solubilising sulfonate group.
- IUPAC
- 9,10-Dihydro-9,10-dioxo-2-anthracenesulfonic acid sodium salt,Anthraquinone-2-sulfonic acid sodium salt
- Synonyms
- 9,10-Dihydro-9,10-dioxo-2-anthracenesulfonic acid sodium salt, Anthraquinone-2-sulfonic acid sodium salt

Dye and Pigment Intermediate
This compound is a key intermediate in the synthesis of various anthraquinone dyes and pigments, contributing to their colouristic properties and stability.
Chemical Synthesis
Its reactive functional groups make Sodium anthraquinone-2-sulfonate a versatile building block for constructing more complex organic molecules in research and industrial settings.
Textile Dyeing
Utilised in the formulation of certain textile dyes, it aids in achieving specific shades and fastness properties on fabrics.
| Molecular weight | 310.26 |
|---|---|
| Empirical formula | C14H7NaO5S |
| Assay | ≥98% (HPLC) |
| Impurities tested | ≤3.5% water (Karl Fischer) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Water hazard class (WGK, DE) | 3 |
|---|---|
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Sodium anthraquinone-2-sulfonate used for?
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Sodium anthraquinone-2-sulfonate is primarily used as an intermediate in the synthesis of dyes and pigments, and in general chemical synthesis.
What is the CAS number and formula for Sodium anthraquinone-2-sulfonate?
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The CAS number is 131-08-8 and the molecular formula is C14H7NaO5S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Sodium anthraquinone-2-sulfonate with a purity of ≥98% (HPLC). Water content is ≤3.5% (Karl Fischer). This product is not supplied as USP, BP, EP or pharmaceutical grade.
How should Sodium anthraquinone-2-sulfonate be handled safely?
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Handling requires precautions as it causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). Wear protective gloves, eye protection, and ensure adequate ventilation. Avoid breathing dust.
Is Sodium anthraquinone-2-sulfonate a controlled substance?
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The provided data does not indicate that Sodium anthraquinone-2-sulfonate is a controlled substance.
How is this product shipped or exported?
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Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, ensuring compliant and secure packaging for international shipment.
How can I request a sample or quote?
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Please contact our sales team or use the online enquiry form to request a sample or a quotation for Sodium anthraquinone-2-sulfonate.
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