Martius Yellow sodium salt monohydrate
Martius Yellow sodium salt monohydrate (CAS: 304655-86-5) is a chemical compound with the linear formula (O₂N)₂C₁₀H₅ONa·H₂O and a molecular weight of 274.16 g/mol. This dye, also known as Manchester Yellow, is primarily utilised as a stain in various biological and histological applications. Its distinct colour properties make it valuable for microscopy and staining techniques.
- IUPAC
- 2,4-Dinitro-1-naphthol sodium salt,Manchester Yellow
- Synonyms
- 2,4-Dinitro-1-naphthol sodium saltManchester Yellow

Histological Staining
Martius Yellow sodium salt monohydrate is employed as a component in staining procedures for histological samples. It aids in the visualisation of cellular structures and tissues under microscopic examination.
Cell Biology Research
In cell biology, this compound serves as a diagnostic dye for specific cellular components. Its application assists researchers in distinguishing different cell types and structures.
Dye and Reagent
As a versatile stain and dye, it is used in various laboratory settings. Its properties are beneficial for analytical and research purposes requiring specific colourimetric indicators.
| Molecular weight | 274.16 |
|---|---|
| Linear formula | (O2N)2C10H5ONa·H2O |
| Assay | 98% |

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
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| 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.
| Absorption | λmax 432 nm |
|---|
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 Martius Yellow sodium salt monohydrate used for?
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Martius Yellow sodium salt monohydrate is used as a stain in cell biology, hematology, and histology, as well as a general laboratory dye and reagent.
What is the CAS number and formula for Martius Yellow sodium salt monohydrate?
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The CAS number is 304655-86-5 and the linear formula is (O₂N)₂C₁₀H₅ONa·H₂O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Martius Yellow sodium salt monohydrate with an assay of 98%. We do not represent this product as USP, BP, or EP grade.
How should Martius Yellow sodium salt monohydrate be handled safely?
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Handle with appropriate personal protective equipment including a dust mask (type N95 US recommended), eyeshields, and gloves. Avoid breathing dust and ensure adequate ventilation. Wash hands thoroughly after handling. It is classified as an irritant to skin, eyes, and respiratory tract.
Is this product a controlled substance?
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No, the provided data does not indicate that Martius Yellow sodium salt monohydrate is a controlled substance.
How is Martius Yellow sodium salt monohydrate packed and exported?
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Products are carefully packed according to international shipping regulations. Tech Serve Solutions is an experienced global supplier and exporter of fine chemicals.
How can I request a quote or sample?
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Please contact our sales team or use the website's inquiry form to request a quote or a sample of Martius Yellow sodium salt monohydrate.
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