S7907

Sodium phosphate dibasic

BioXtra, ≥99.0%

• Synonym(s): sec-Sodium phosphate, Disodium hydrogen phosphate, Disodium phosphate, Sodium hydrogenphosphate
• Linear Formula: Na₂HPO₄
• CAS Number: 7558-79-4
• Molecular Weight: 141.96
• EC Number: 231-448-7
• MDL number: MFCD00003496
• UNSPSC Code: 12161700
• eCl@ss: 38070211
• PubChem Substance ID: 24899769
• NACRES: NA.25

Properties

• product line: BioXtra
• Quality Level: 200
• assay: ≥99.0%
• form: powder or crystals
• impurities: ≤0.1% Insoluble matter
• pH: 8.0-11.0 (20 °C, 1 M in H₂O)
• pKa (25 °C): (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
• solubility: H₂O: 1 M at 20 °C, clear, colorless
• anion traces: chloride (Cl^-): ≤0.05%; sulfate (SO₄^2-): ≤0.05%
• cation traces: Al: ≤0.0005%; Ca: ≤0.002%; Cu: ≤0.0005%; Fe: ≤0.002%; K: ≤0.005%; Mg: ≤0.005%; NH₄⁺: ≤0.05%; Pb: ≤0.001%; Zn: ≤0.0005%
• absorption: <0.05 at 260 in H₂O at 1 M; <0.05 at 280 in H₂O at 1 M
• SMILES string: [Na+].[Na+].[H]OP([O-])([O-])=O
• InChI: 1S/2Na.H3O4P/c;;1-5(2,3)4/h;;(H3,1,2,3,4)/q2*+1;/p-2
• InChI key: BNIILDVGGAEEIG-UHFFFAOYSA-L

Description

General description

Sodium phosphate dibasic (NaH₂PO₄), also known as disodium phosphate, is a commonly used phosphate salt in biochemistry research due to its versatile properties. It is a key component in the preparation of phosphate buffer saline (PBS) and phosphate buffer, a commonly used buffer solution in many biological applications. In addition to its buffer properties, NaH₂PO₄ is also used as a precipitating agent to form silver orthophosphate (Ag₃PO₄) powders, making it a valuable tool in many laboratory settings. Disodium phosphate is also a widely used emulsifier in dairy products such as cheese and other foods.

Application

Sodium phosphate dibasic has been used:

• as a component of phosphate buffered saline (PBS)
• as a component of buffer for the preparation of cryopreservation diluent
• in the preparation of McIlvaine buffer (citrate-phosphate buffer) for toluidine blue staining
• in the preparation of the S9 mix for the Ames test, and SOS Chromotest
• in the preparation of calcium deficient hydroxyapatite (CDHA) paste during the fabrication process of the CDHA scaffold

Features and Benefits

• The BioXtra product line ensures high-quality products for consistent results.
• High level of assay ( ≥99.0%), indicating its purity.
• Powder form for easy handling and use.

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Eyeshields, Gloves, type N95 (US)