Erythrosin B isothiocyanate, isomer II
Erythrosin B isothiocyanate, isomer II (CAS 72814-84-7) is a chemical compound with the molecular formula C21H7I4NO5S and a molecular weight of 892.97 g/mol. It is primarily utilised in laboratory settings for staining applications within cell biology, haematology, and histology. Its distinct spectral properties, with an absorption maximum at 535 nm, make it valuable for specific visualisation techniques.
- Synonyms
- C21H7I4NO5S

Cell Biology Staining
Erythrosin B isothiocyanate, isomer II serves as a specialised stain in cell biology for visualisation purposes. Its absorption characteristics at 535 nm allow for targeted applications in microscopy and related imaging techniques.
Hematology and Histology
This compound is employed in haematology and histology laboratories for tissue and cell staining. It aids in differentiating cellular components or structures during microscopic examination.
Laboratory Reagent
As a laboratory reagent, Erythrosin B isothiocyanate, isomer II is used in research and analytical procedures. It is suitable for applications requiring a fluorochrome with specific spectral properties.
| Molecular weight | 892.97 |
|---|---|
| Empirical formula | C21H7I4NO5S |
| Impurities tested | <5% acetone solvent of recrystallization |

Hazard statements
- H302Harmful if swallowed
- H312Harmful in contact with skin
- H315Causes skin irritation
- H319Causes serious eye irritation
- H332Harmful if inhaled
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 20/21/22-36/37/38 |
| 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 535 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 Erythrosin B isothiocyanate, isomer II used for?
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Erythrosin B isothiocyanate, isomer II is used as a stain in cell biology, haematology, and histology, as well as a general laboratory reagent for specific visualisation techniques.
What are the CAS number and formula for Erythrosin B isothiocyanate, isomer II?
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The CAS number is 72814-84-7 and the empirical formula (Hill notation) is C21H7I4NO5S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Erythrosin B isothiocyanate, isomer II with a specified purity and a maximum of 5% acetone solvent. It is suitable for laboratory research and not represented as USP, BP, EP, or other pharmacopoeia grades.
How should Erythrosin B isothiocyanate, isomer II be handled safely?
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Handle with appropriate personal protective equipment including a dust mask (N95 type), eyeshields, and gloves. Avoid dust formation and breathing vapours. It is harmful if swallowed, inhaled, or in contact with skin, and causes skin and eye irritation.
How is Erythrosin B isothiocyanate, isomer II packed and exported?
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Erythrosin B isothiocyanate, isomer II is carefully packed according to industry standards for safe transport and is available for global export by Tech Serve Solutions.
How can I request a sample or quote?
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To request a sample or a quote for Erythrosin B isothiocyanate, isomer II, please contact our sales department through the website or by phone.
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