Tetrabromophenol Blue sodium salt
Tetrabromophenol Blue sodium salt (CAS: 108321-10-4; Formula: C19H5Br8NaO5S) is a brominated derivative of phenolsulfonphthalein. With a molecular weight of 1007.53 g/mol, this compound serves as a valuable indicator and stain in various laboratory applications. Its properties make it particularly useful in cell biology and hematology for staining procedures, contributing to accurate microscopic analysis and research.
- IUPAC
- 3,3′,3′′,4,5,5′,5′′,6-Octabromophenolsulfonphthalein sodium salt
- Synonyms
- 3,3′,3′′,4,5,5′,5′′,6-Octabromophenolsulfonphthalein sodium salt

Biological Staining
Tetrabromophenol Blue sodium salt is employed as a stain in cell biology and histology. It aids in visualising cellular structures and tissues under microscopic examination, facilitating research and diagnostic procedures.
Indicator in Assays
This compound functions as an indicator in specific biochemical and chemical assays. Its colour changes can signify the completion of a reaction or the presence of certain analytes.
Research Reagent
As a specialised laboratory reagent, it supports diverse research applications in fields such as life sciences and analytical chemistry where its unique chemical properties are required.
| Molecular weight | 1007.53 |
|---|---|
| Empirical formula | C19H5Br8NaO5S |

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.
| Absorption | λmax 610 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 Tetrabromophenol Blue sodium salt used for?
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Tetrabromophenol Blue sodium salt is primarily used as a stain in cell biology and histology, and as an indicator in various laboratory assays. It is also utilised as a specialised research reagent.
What is the CAS number and formula for Tetrabromophenol Blue sodium salt?
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The CAS number for Tetrabromophenol Blue sodium salt is 108321-10-4, and its empirical formula is C19H5Br8NaO5S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Tetrabromophenol Blue sodium salt for research and laboratory use. The specific assay and purity are detailed in the product specifications. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should Tetrabromophenol Blue sodium salt be handled?
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Tetrabromophenol Blue sodium salt is classified as a Warning substance, indicated by GHS07. It causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). Handle with appropriate personal protective equipment in a well-ventilated area. Avoid contact with skin, eyes, and clothing. P261, P305 + P351 + P338.
Is Tetrabromophenol Blue sodium salt a controlled substance?
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The provided data does not indicate that Tetrabromophenol Blue sodium salt is a controlled substance.
How is Tetrabromophenol Blue sodium salt packed and shipped?
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Tetrabromophenol Blue sodium salt is carefully packed to ensure safe transit and is exported globally by Tech Serve Solutions in compliance with international shipping regulations for chemical products.
How can I request a sample or quote for Tetrabromophenol Blue sodium salt?
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To request a sample or a quotation for Tetrabromophenol Blue sodium salt, please contact our sales team through the website or by phone, providing your specific requirements.
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