Description

p-Nitrophenol Sodium Salt (CAS No. 824-78-2) is a high-purity organic compound with the molecular formula C₆H₄NNaO₃ and IUPAC name sodium;4-nitrophenolate. This yellow crystalline powder is widely utilized in biochemical and chemical research due to its role as a chromogenic substrate for enzyme assays, particularly alkaline phosphatase. It exhibits excellent solubility in water and polar organic solvents, making it ideal for laboratory applications. Our product is rigorously tested for purity (>98%) and consistency, ensuring reliable performance in sensitive experiments. Suitable for spectrophotometric analysis, it is packaged under controlled conditions to maintain stability and shelf life. Synonyms include Sodium 4-nitrophenolate, Sodium p-nitrophenoxide, and 4-Nitrophenol sodium salt.

Properties

• CAS Number: 824-78-2
• Complexity: 123
• IUPAC Name: sodium;4-nitrophenolate
• InChI: InChI=1S/C6H5NO3.Na/c8-6-3-1-5(2-4-6)7(9)10;/h1-4,8H;/q;+1/p-1
• InChI Key: CURNJKLCYZZBNJ-UHFFFAOYSA-M
• Exact Mass: 161.00888727
• Molecular Formula: C6H4NNaO3
• Molecular Weight: 161.09
• SMILES: C1=CC(=CC=C1[N+](=O)[O-])[O-].[Na+]
• Topological: 68.9
• Monoisotopic Mass: 161.00888727
• Physical Description: Yellow solid; Dihydrate: Orange powder;
• Color/Form: Yellow crystalline solid
• Solubility: SOLUBILITY: 5.97 G/100 CC WATER @ 25 °C /TETRAHYDRATE/
• Odor Threshold: Detection in air: 2.3 mg/cu m /4-Nitrophenol/
• Synonyms: Sodium 4-nitrophenolate, 824-78-2, Sodium 4-nitrophenoxide, 4-Nitrophenol sodium salt, Sodium p-nitrophenoxide, Sodium p-nitrophenolate, Sodium p-nitrophenol, Sodium nitrophenate, Phenol, 4-nitro-, sodium salt, P-NITROPHENOL SODIUM SALT, Sodium p-nitrophenate, Phenol, p-nitro-, sodium salt, para-Nitro sodium phenolate, HSDB 2592, 4RPH5V4ONG, EINECS 212-536-4, EPA Pesticide Chemical Code 129077, DTXSID3027320, AI3-09021, Phenol, 4-nitro-, sodium salt (1:1), DTXCID907320, SODIUM, (P-NITROPHENOXY)-, P-NITROPHENOL SODIUM SALT [HSDB], Sodium pnitrophenol, Sodium pnitrophenate, Sodium pnitrophenolate, Sodium pnitrophenoxide, Sodium 4nitrophenolate, Sodium 4nitrophenoxide, 4Nitrophenol sodium salt, paraNitro sodium phenolate, Phenol, pnitro, sodium salt, Phenol, 4nitro, sodium salt, 212-536-4, sodium;4-nitrophenolate, 4-NITROPHENOLSODIUMSALTDIHYDRATE, PNSP, 4-nitrophenol sodium, UNII-4RPH5V4ONG, p-nitrophenoxide sodium salt, SCHEMBL237649, CHEMBL3183771, MSK9022, Tox21_300477, AKOS006228551, NCGC00254344-01, CAS-824-78-2, N0223, NS00078716, Sodium 4-nitrophenolate Contains 20-30% water, 4-Nitrophenol sodium 100 microg/mL in Acetonitrile, 4-NITROPHENOL SODIUM SALT DIHYDRATE PEST ANAL, Q27260406, F1905-7102

Application

p-Nitrophenol Sodium Salt is commonly used as a substrate for alkaline phosphatase in enzymatic assays, where its hydrolysis produces a yellow-colored product measurable at 405 nm. It serves as a key reagent in biochemical research for studying enzyme kinetics and inhibition. Additionally, it finds applications in organic synthesis as an intermediate for dyes, pharmaceuticals, and agrochemicals. Its stability and water solubility make it suitable for buffer-based assays and diagnostic applications.

Safety and Hazards

GHS Hazard Statements

• H302: Harmful if swallowed [Warning Acute toxicity, oral]
• H371: May cause damage to organs [Warning Specific target organ toxicity, single exposure]
• H373: May causes damage to organs through prolonged or repeated exposure [Warning Specific target organ toxicity, repeated exposure]

Precautionary Statements

• P260, P264, P270, P301+P317, P308+P316, P319, P330, P405, and P501

Hazard Classes and Categories

• Flam. Sol. 2 (33.3%)
• Self-react. C (10.8%)
• Acute Tox. 4 (100%)
• Acute Tox. 4 (32.5%)
• Skin Irrit. 2 (34.2%)
• Eye Irrit. 2 (45%)
• Acute Tox. 4 (33.3%)
• STOT SE 3 (33.3%)
• STOT SE 3 (55%)
• STOT RE 2 (33.3%)
• Aquatic Chronic 2 (10.8%)

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Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.