Description

4-Nitrophenol Sodium Salt Dihydrate is the water-soluble sodium salt derivative of 4-nitrophenol, a key chromogenic substrate and chemical intermediate. This compound matters for its consistent reactivity and stability in aqueous systems, making it a preferred form for enzymatic assays and synthesis. It is needed by manufacturers and researchers in the pharmaceutical, diagnostic, and fine chemical industries for analytical and process applications.

Application

• Enzymatic Assay Substrate: Widely used as a chromogenic substrate for detecting alkaline phosphatase (ALP) activity in ELISA tests, clinical diagnostics, and biochemical research.
• Chemical Synthesis Intermediate: Serves as a key precursor in the synthesis of dyes, pigments, and more complex pharmaceutical compounds.
• Analytical Chemistry Standard: Employed as a reference standard in chromatography (HPLC, TLC) and spectrophotometric analysis for method validation and calibration.
• Research & Development: Utilized in laboratory-scale research for studying reaction mechanisms, enzyme kinetics, and developing new analytical methods.
• Photographic Chemicals: Can be used in the formulation of certain specialty photographic developers and related imaging chemicals.
• Corrosion Inhibitor Studies: Investigated as a component or model compound in research related to corrosion inhibition for industrial materials.

Basic Information

Product Name	4-Nitrophenol Sodium Salt Dihydrate
CAS No.	66924-59-2
Molecular Formula	C6H4NNaO3 · 2H2O
Molecular Weight	191.10 g/mol (Anhydrous basis: 155.08 g/mol)
Synonyms	4-Nitrophenol sodium salt; Sodium 4-nitrophenolate dihydrate; p-Nitrophenol sodium salt; Sodium p-nitrophenoxide dihydrate; PNPP-Na (for enzymatic assays); 4-Nitrophenolate sodium salt dihydrate; Sodium 4-nitrophenoxide dihydrate; 4-Hydroxynitrobenzene sodium salt dihydrate
EINECS	Contact for details

Quality Control

Our 4-Nitrophenol Sodium Salt Dihydrate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure high purity and consistency, meeting the stringent requirements for diagnostic and research applications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to orange-yellow crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0% (on anhydrous basis)
Water Content (KF)	16.0 - 20.0 %
pH (5% Solution)	7.0 - 9.0
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear, yellow solution

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.