Naphthol AS-TR phosphate disodium salt
Naphthol AS-TR phosphate disodium salt (CAS 4264-93-1) is a premium quality chemical compound with the molecular formula C18H13ClNNa2O5P and a molecular weight of 435.71. It serves as a crucial chromogenic substrate for the histochemical detection of both acid and alkaline phosphatase enzymes. This reagent is vital in biological and biochemical research for visualising enzymatic activity in tissue samples.

Enzyme Detection in Histochemistry
Naphthol AS-TR phosphate disodium salt is extensively used as a substrate for the histochemical demonstration of acid and alkaline phosphatase. Enzymatic cleavage liberates naphthol, which couples to form a coloured precipitate at the site of enzyme activity.
Biochemical Research Reagent
This compound is an essential tool in biochemical laboratories for studies involving enzyme kinetics and detection. Its application aids in understanding cellular functions and enzyme localisation within biological systems.
Immunohistochemistry Applications
The salt is utilised in immunohistochemistry protocols to localise and detect phosphatase activity, contributing to diagnostic pathology and research into various disease states.
| Molecular weight | 435.71 |
|---|---|
| Empirical formula | C18H13ClNNa2O5P |
| Assay | ≥99% (HPLC) |
| Storage temperature | −20°C |
| Application | Substrate for the histochemical demonstration of acid and alkaline phosphatase. |
| Quality Level | PREMIUM |
|---|
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 Naphthol AS-TR phosphate disodium salt used for?
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Naphthol AS-TR phosphate disodium salt is primarily used as a substrate for the histochemical demonstration of acid and alkaline phosphatase, enabling the visualisation of enzyme activity in biological tissues.
What is the CAS number and molecular formula for Naphthol AS-TR phosphate disodium salt?
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The CAS number is 4264-93-1, and the molecular formula is C18H13ClNNa2O5P.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Naphthol AS-TR phosphate disodium salt at a premium quality level with an assay of ≥99% (HPLC). TSS does not represent this product as USP, BP, or EP grade.
How should Naphthol AS-TR phosphate disodium salt be handled and stored?
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Naphthol AS-TR phosphate disodium salt requires storage at -20°C. As indicated by its WGK Germany classification of 3, appropriate safety precautions should be taken during handling to avoid exposure.
How is Naphthol AS-TR phosphate disodium salt shipped and exported?
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Tech Serve Solutions, as a specialist global supplier and exporter, ships Naphthol AS-TR phosphate disodium salt worldwide, adhering to all relevant regulations for chemical transport.
How can I request a quote or sample for Naphthol AS-TR phosphate disodium salt?
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Please contact our sales team via our website or direct inquiry channels to request a quote or sample of Naphthol AS-TR phosphate disodium salt.
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