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Naphthol AS-TR phosphate disodium is a water-soluble chromogenic dye widely employed as an enzymatic substrate for detecting alkaline phosphatase activity, as it undergoes enzymatic hydrolysis to yield a measurable colored product, enabling sensitive spectrophotometric monitoring of enzyme activity in biological samples such as serum or urine for diagnostic and biochemical assay applications.

| Pack Size | Price | USA Warehouse | Global Warehouse | Quantity |
|---|---|---|---|---|
| 25 mg | $35 | - | In Stock | |
| 50 mg | $52 | - | In Stock | |
| 100 mg | $81 | - | In Stock |
| Description | Naphthol AS-TR phosphate disodium is a water-soluble chromogenic dye widely employed as an enzymatic substrate for detecting alkaline phosphatase activity, as it undergoes enzymatic hydrolysis to yield a measurable colored product, enabling sensitive spectrophotometric monitoring of enzyme activity in biological samples such as serum or urine for diagnostic and biochemical assay applications. |
| Molecular Weight | 435.71 |
| Formula | C18H13ClNNa2O5P |
| Cas No. | 4264-93-1 |
| Smiles | O=C(C1=CC2=C(C=C1OP([O-])([O-])=O)C=CC=C2)NC3=CC=C(C=C3C)Cl.[Na+].[Na+] |
| Color | White |
| Appearance | Solid |
| Storage | keep away from direct sunlight | -20°C for 2 years, 4°C for 1 year | Shipping with blue ice. | ||||||||||||||||||||||||||||||||||||||||
| Solubility Information | H2O: 80 mg/mL (183.61 mM), Sonication is recommended. DMSO: 40 mg/mL (91.8 mM), Sonication is recommended. | ||||||||||||||||||||||||||||||||||||||||
Solution Preparation Table | |||||||||||||||||||||||||||||||||||||||||
DMSO/H2O
H2O
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