3′,3′′,5′,5′′-Tetrabromophenolphthalein ethyl ester potassium salt
3′,3′′,5′,5′′-Tetrabromophenolphthalein ethyl ester potassium salt (CAS: 62637-91-6) is a chemical compound with the molecular formula C22H13Br4KO4 and a molecular weight of 700.05. It is recognised for its properties as a stain and dye, finding primary utility in cell biology and hematology/histology applications for staining purposes. Tech Serve Solutions supplies this reagent for research and laboratory use.
- Synonyms
- 5′,5′′-Tetrabromophenolphthalein ethyl ester potassium salt62637-91-6C22H13Br4KO4

Cell Biology Staining
This compound serves as a vital staining agent in cell biology. Its spectral properties allow for differential visualisation of cellular structures and components under microscopy.
Hematology and Histology Stains
Utilised within hematology and histology, the stain aids in the precise identification and differentiation of blood cells and tissue components. It is valuable for diagnostic and research purposes in these fields.
Laboratory Reagent
As a versatile laboratory reagent, it is employed in various analytical procedures requiring specific chromogenic properties. Its application is critical for reproducible experimental outcomes.
| Molecular weight | 700.05 |
|---|---|
| Empirical formula | C22H13Br4KO4 |
| Melting point | 210 °C (dec.)(lit.) |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Absorption | λmax 386 nm (2nd)λmax 593 nm |
|---|---|
| Synonym | 3.0 - 3.5, yellow to light green4.2 - 4.9, blue-green to blue-violet |
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′′-Tetrabromophenolphthalein ethyl ester potassium salt used for?
+
This compound is primarily used as a stain and dye in cell biology, hematology, and histology applications.
What is the CAS number and molecular formula?
+
The CAS number is 62637-91-6, and the empirical formula is C22H13Br4KO4.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies this product for research and laboratory applications. The specific assay and purity are detailed in the product specifications; it is not represented as USP, BP, or EP grade.
What are the safety and handling precautions for this chemical?
+
This compound requires careful handling. Recommended personal protective equipment includes eyeshields and gloves, with a type N95 (US) or P1 (EN143) respirator filter suitable for respiratory protection. It has a WGK rating of 3 in Germany, indicating a high hazard to water.
How is this chemical packed, shipped, and exported?
+
Tech Serve Solutions adheres to strict international shipping regulations for the export of chemicals. Packaging is designed to ensure product integrity and safety during transit.
How can I request a quote or sample?
+
To request a quote or a sample, please contact our sales department through the TSS website or by calling our customer service line.
▶ Related products

(−)-Curcumol
C15H24O2
Cell Biology
(±) Clopidogrel hydrogensulfate
Cell Biology

(±)-L-Alliin
C6H11NO3S
Cell Biology
(±)-2-Amino-4-phosphonobutyric acid
C4H10NO5P
Cell Biology
(±)-2-Methylarachidonoyl-2′-fluoroethylamide
C23H38NOF
Cell Biology
(±)-3,4-Methylenedioxy-N-ethylamphetamine hydrochloride
Cell Biology

(±)-3,4-Methylenedioxyamphetamine hydrochloride
Cell Biology

(±)-3,4-Methylenedioxymethamphetamine hydrochloride
Cell Biology
▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis