3′,3′′,5′,5′′-Tetraiodophenolsulfonephthalein
3′,3′′,5′,5′′-Tetraiodophenolsulfonephthalein (CAS: 4430-24-4) is a chemical compound with the molecular formula C19H10I4O5S and a molecular weight of 857.96 g/mol. This compound is recognised for its properties as a stain and dye, finding applications in various scientific disciplines. It is primarily utilised in biological staining techniques within cell biology, hematology, and histology for microscopic examination and analysis.
- Synonyms
- 5′,5′′-Tetraiodophenolsulfonephthalein4430-24-4C19H10I4O5S

Cell Biology Staining
Used as a stain in cell biology research to visualise cellular structures and components under microscopy. Its specific properties aid in differentiating cellular elements.
Hematology and Histology
Applied in hematology and histology for the differential staining of blood cells and tissue samples. It helps in the precise identification and analysis of various cell types and tissue architectures.
Dye and Indicator Applications
Serves as a dye and potentially an indicator due to its chromophoric nature. Its absorption maximum at 433 nm suggests its utility in specific analytical or visual applications.
| Molecular weight | 857.96 |
|---|---|
| Empirical formula | C19H10I4O5S |
| Melting point | 229 °C (dec.)(lit.) |

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) | 26-37/39 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Absorption | λmax 433 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 3′,3′′,5′,5′′-Tetraiodophenolsulfonephthalein used for?
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3′,3′′,5′,5′′-Tetraiodophenolsulfonephthalein is primarily used as a stain and dye in scientific research, particularly in cell biology, hematology, and histology for microscopic analysis of cells and tissues.
What are the CAS number and formula for 3′,3′′,5′,5′′-Tetraiodophenolsulfonephthalein?
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The CAS number is 4430-24-4, and the empirical formula is C19H10I4O5S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3′,3′′,5′,5′′-Tetraiodophenolsulfonephthalein with an absorption maximum of λmax 433 nm. We do not represent this product as USP, BP, or EP grade.
What are the safety and handling precautions for this chemical?
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This compound is classified as a warning substance. It causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). Recommended personal protective equipment includes a dust mask type N95 (US), eyeshields, and gloves. Ensure adequate ventilation.
How is 3′,3′′,5′,5′′-Tetraiodophenolsulfonephthalein packed and shipped?
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Products are packed according to industry standards for safe transport and are exported globally by Tech Serve Solutions.
How can I request a quote or sample?
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To request a quote or sample, please contact our sales team through the website or by phone, providing the product name and CAS number.
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