Description

Monosodium phosphate (MSP), also known as sodium dihydrogen phosphate, is a highly versatile inorganic compound with the molecular formula H₂NaO₄P. This white, crystalline powder is widely utilized in laboratory and industrial applications due to its buffering properties, solubility in water, and compatibility with biological systems. With a CAS number of 89140-32-9 (and alternative CAS 7558-80-7), it serves as a reliable source of phosphate ions in biochemical and molecular biology protocols. Our high-purity monosodium phosphate is rigorously tested for consistency, ensuring optimal performance in pH regulation, reagent preparation, and analytical standards. Available in various grades, including ACS reagent, anhydrous, and monohydrate forms, this product meets the stringent demands of researchers, pharmaceutical manufacturers, and food science professionals.

Properties

• CAS Number: 89140-32-9
• Complexity: 61.9
• IUPAC Name: sodium;dihydrogen phosphate
• InChI: InChI=1S/Na.H3O4P/c;1-5(2,3)4/h;(H3,1,2,3,4)/q+1;/p-1
• InChI Key: AJPJDKMHJJGVTQ-UHFFFAOYSA-M
• Exact Mass: 119.95883982
• Molecular Formula: H2NaO4P
• Molecular Weight: 119.977
• SMILES: OP(=O)(O)[O-].[Na+]
• Topological: 80.6
• Monoisotopic Mass: 119.95883982
• Physical Description: Pellets or Large Crystals; Dry Powder, Pellets or Large Crystals; Dry Powder, Liquid; NKRA; Other Solid; Dry Powder, Other Solid; Dry Powder; Liquid
• Color/Form: Colorless, monoclinic crystals
• Odor: Odorless
• Melting Point: Decomposes at 75
• Density: 2360 kg/cu m
• Dissociation Constants: The pKa of monosodium phosphate is 6.8-7.2
• Synonyms: 7558-80-7, Monosodium phosphate, Sodium phosphate monobasic, SODIUM DIHYDROGEN PHOSPHATE, Sodium dihydrogenorthophosphate, Sodium acid phosphate, Sodium phosphate, monobasic, Sodium primary phosphate, Monosodium dihydrogen orthophosphate, Acid sodium phosphate, Sodium phosphate monobasic anhydrous, Monosodium monophosphate, sodium dihydrogenphosphate, Monosodium phosphate, anhydrous, Monobasic sodium phosphate, Monosodium orthophosphate, Sodium dihydrogen orthophosphate, sodium;dihydrogen phosphate, Monosodium dihydrogen phosphate, Sodium dihydrogen phosphate, anhydrous, Sodium phosphate (Na(H2PO4)), Sodium biphosphate, anhydrous, Sodium orthophosphate monobasic, NaH2PO4, Sodium phosphate,monobasic, MFCD00003527, KH7I04HPUU, 89140-32-9, SODIUM PHOSPHATE, MONOBASIC ANHYDROUS, 7632-05-5, INS NO.339(I), CHEBI:37585, SODIUM PHOSPHATE, MONOBASIC, ANHYDROUS, Monosodium dihydrogen monophosphate, INS-339(I), Sodium phosphate monobasic, anhydrous, Sodium phosphate monobasic (anhydrate), Sodium phosphate monobasic (anhydrous), E-339(I), phosphoric acid, monosodium salt, anhydrous, SODIUM DIHYDROGEN PHOSPHATE ANHYDROUS, Monosorb XP-4, Phosphoric acid, sodium salt, Primary sodium phosphate, Sodium biphosphate anhydrous, Monosodium hydrogen phosphate, Sodium phosphate (NaH2PO4), Sodium orthophosphate, primary, Sodium dihydrogen monophosphate, HSDB 738, EINECS 231-449-2, UNII-KH7I04HPUU, Sodium dihydrogen phosphate (1:2:1), Sodium monobasic phosphate (NaH2PO4), Sodium dihydrogen phosphate (NaH2PO4), Phosphosoda, Buromin, Clicolon, Armite, Instant calgon, Turrixin ST, HY-Phos, Hemisodium phosphate, Phosphoric acid, sodium salt (1:1), Sodium phosphate glass, sodiumdihydrogenphosphate, sodium dihydrogenphoshate, sodium dihydrogenphospate, sodium dihydrogenphosphat, sodiumdihydrogen phosphate, natriumdihydrogen-phosphate, sodium dihydrogen-phosphate, sodium phosphate mono-basic, EC 231-449-2, UNII-SE337SVY37, SCHEMBL21334, Monosodium phosphate anhydrous, Sodium salt of phosphoric acid, INKP 100, INKP-100, SE337SVY37, DTXSID7035222, Sodium dihydngen phoshate anhydrous, Sodium phosphate, monobasic (USP), Anhydrous monobasic sodium phosphate, EINECS 231-558-5, Sodium dihydrogenphosphate (granular), Phosphoric acid, sodium salt (1:?), AKOS024433265, Sodium phosphate monobasic, USP grade, AT32901, DB09449, FS42365, SODIUM PHOSPHATE MONOBASIC [HSDB], Sodium phosphate monobasic, AR, >=98%, Sodium phosphate monobasic, LR, >=97%, SODIUM PHOSPHATE, MONOBASIC [MI], E339, SODIUM PHOSPHATE,MONOBASIC [VANDF], DB-221858, NS00082818, Sodium phosphate monobasic, for HPLC, 99%, D04400, Sodium phosphate monobasic, BioXtra, >=99.0%, Q415877, Sodium phosphate monobasic, USP, 98.0-103.0%, SODIUM PHOSPHATE, MONOBASIC, ANHYDROUS [II], Sodium phosphate monobasic, ReagentPlus(R), >=99.0%, Sodium phosphate monobasic, 99.999% trace metals basis, Sodium phosphate monobasic, Vetec(TM) reagent grade, 99%, SODIUM PHOSPHATE, MONOBASIC ANHYDROUS [ORANGE BOOK], SODIUM PHOSPHATE, MONOBASIC, ANHYDROUS [ORANGE BOOK], Sodium phosphate monobasic, SAJ first grade, 98.0-101.0%, Sodium phosphate monobasic, SAJ special grade, 99.0-101.0%, EPA Method 603/8030, VOA Vial Preserved to pH 4 – 5, 72/cs, Sodium phosphate monobasic, purum p.a., anhydrous, >=99.0% (T), Sodium phosphate monobasic, meets USP testing specifications, anhydrous, Sodium phosphate monobasic, anhydrous, free-flowing, Redi-Dri(TM), >=99.0%, Sodium phosphate monobasic, BioReagent, for molecular biology, anhydrous, >=98%, Sodium phosphate monobasic, Biotechnology Performance Certified, Cell Culture Tested, Sodium phosphate monobasic Molecular Biology Grade, suitable for cell culture, insect cell culture, and plant cell culture, Sodium phosphate monobasic, BioPerformance Certified, suitable for cell culture, suitable for insect cell culture, suitable for plant cell culture, >=99.0% (titration)

Application

Monosodium phosphate is commonly employed as a buffering agent in biological and chemical research to maintain stable pH conditions. It is a key component in phosphate-buffered saline (PBS) and other cell culture media formulations. In the food industry, it acts as an emulsifier and pH adjuster in processed cheeses and baked goods. Additionally, it finds use in water treatment processes to prevent scale formation and corrosion.

Safety and Hazards

GHS Hazard Statements

• Not Classified
• Reported as not meeting GHS hazard criteria by 2 of 2 companies. For more detailed information, please visit ECHA C&L website.

Precautionary Statements

• P264+P265, P280, P305+P351+P338, and P337+P317

Hazard Classes and Categories

• Eye Irrit. 2 (11%)

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