71640

Sodium phosphate dibasic

puriss. p.a., ACS reagent, anhydrous, ≥99.0% (T)

• 동의어(들): 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 코드: 12352300
• eCl@ss: 38070211
• PubChem Substance ID: 329763389
• NACRES: NA.21

속성

• Grade: ACS reagent
• Quality Level: 200
• grade: puriss. p.a.
• 분석: ≥99.0% (T)
• 양식: powder (or crystals)
• 불순물: ≤0.001% total nitrogen (N)
• 손실: ≤0.2% loss on drying, 105 °C
• pH: 8.7-9.3 (25 °C, 50 mg/mL in H₂O)
• pKa(25 °C): (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
• 음이온 미량물: chloride (Cl^-): ≤10 mg/kg; sulfate (SO₄^2-): ≤50 mg/kg

설명

일반 설명

Sodium phosphate dibasic is a sodium salt of phosphoric acid. It is highly hygroscopic and water-soluble compound used as a texturizer, emulsifier, and buffer. It can also be used as a reagent in water softeners, cleaners, and boiler treatments process.

Sodium phosphate is widely used buffer in molecular biology, biochemistry, and chromatographic studies. It exists in three forms: monobasic (NaH₂PO₄), dibasic (Na₂HPO₄), and tribasic (Na₃PO₄). Monobasic and dibasic forms in varying ratios are commonly used to compose the neutral sodium phosphate buffer solution.

애플리케이션

Sodium phosphate dibasic can be used:

• As an efficient and low-cost catalyst for the synthesis of 2-aminochrome by the reaction between aromatic aldehyde, malononitrile, and α- or β-naphthol under solvent-free conditions.
• As a buffer in the synthesis of cyclic, acyclic enones and α, β-unsaturated aldehydes from trimethylsilyl enol ethers by using palladium as a catalyst and oxone as oxidant.
• As an efficient catalyst in the synthesis of 3,4-dihydropyrano[3,2-c] chromenes from aldehydes, malononitrile and 4-hydroxycoumarin.
• As a phosphorous precursor with the phosphoric acid in the synthesis of hydroxyapatite by precipitation method using anionic surfactant SDS (sodium dodefcyl sulfate).

안전성 정보

• Storage Class Code: 13 - Non Combustible Solids
• WGK: WGK 1
• Flash Point (°F): Not applicable
• Flash Point (°C): Not applicable