Phenolphthalein bisphosphate pyridine salt
Phenolphthalein bisphosphate pyridine salt (CAS: 267240-23-3) is a key biochemical reagent with the molecular formula C20H16O10P2 · C5H5N and a molecular weight of 557.38 g/mol. It serves as a valuable substrate for enzymatic assays, particularly in the study of phosphatases. Its purity meets stringent laboratory standards, ensuring reliable performance in research and diagnostic applications.
- IUPAC
- Phenolphthalein diphosphate pyridine salt

Enzyme Substrate for Phosphatase Assays
This compound is specifically employed as a substrate for the enzymatic determination of acid and alkaline phosphatase activity. Upon cleavage by the enzyme, it releases phenolphthalein, which can be quantified spectrophotometrically.
Biochemical Research
Utilised in various biochemical and molecular biology research settings to investigate enzyme kinetics, characterise enzyme mechanisms, and screen for enzyme inhibitors.
Diagnostic Tool Development
Can be incorporated into the development of diagnostic kits and assays for the detection of phosphatase-related biomarkers in biological samples.
| Molecular weight | 557.38 |
|---|---|
| Empirical formula | C20H16O10P2 · C5H5N |
| Assay | ≥90% (T) |
| Loss on drying | ≤2% loss on drying |
| Storage temperature | 2-8°C |
| Impurities tested | ≤0.05% free phenolphthalein |
| Application | Suitable as substrate for phosphatase. |
| 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.
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 Phenolphthalein bisphosphate pyridine salt used for?
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Phenolphthalein bisphosphate pyridine salt is primarily used as a substrate in enzymatic assays for determining the activity of acid and alkaline phosphatases. It is also valuable in biochemical research and the development of diagnostic tools.
What are the CAS number and formula for Phenolphthalein bisphosphate pyridine salt?
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The CAS number is 267240-23-3, and the molecular formula is C20H16O10P2 · C5H5N.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Phenolphthalein bisphosphate pyridine salt with an assay of ≥90% (T). This product is not represented as USP, BP, or EP grade.
How should Phenolphthalein bisphosphate pyridine salt be handled safely?
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For safe handling, always use recommended personal protective equipment, including eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter is advised. The compound has a WGK Germany rating of 3, indicating it is hazardous to water.
Is Phenolphthalein bisphosphate pyridine salt shipped internationally?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including Phenolphthalein bisphosphate pyridine salt, and can accommodate international orders.
How can I request a sample or quote?
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To request a sample or a quotation for Phenolphthalein bisphosphate pyridine salt, please contact our sales department through the website or by phone.
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