Sodium phosphate dibasic

• Catalog No.: 71639
• CAS Number: 7558-79-4
• M. F.: HNa2O4P
• M. W.: 141.958841
• Purity: ≥99.5% (T)

SYNONYMS

• Title: 磷酸钠 二元
• IUPAC name: disodium hydrogen phosphate
• IUPAC Traditional name: disodium hydrogen phosphate
• Synonyms: Sodium hydrogenphosphate; 磷酸二钠; sec-Sodium phosphate; Disodium phosphate; Disodium hydrogen phosphate; 二盐基磷酸钠; 磷酸一氢钠; 磷酸氢二钠

DATABASE IDS

• EC Number: 231-448-7
• CAS Number: 7558-79-4
• MDL Number: MFCD00003496

PROPERTIES

• Antion Traces: chloride (Cl-): ≤10 mg/kg
• Antion Traces: sulfate (SO42-): ≤50 mg/kg
• Cation Traces: Al: ≤5 mg/kg
• Cation Traces: As: ≤0.2 mg/kg
• Cation Traces: Ba: ≤5 mg/kg
• Cation Traces: Bi: ≤5 mg/kg
• Cation Traces: Ca: ≤10 mg/kg
• Cation Traces: Cd: ≤5 mg/kg
• Cation Traces: Co: ≤5 mg/kg
• Cation Traces: Cr: ≤5 mg/kg
• Cation Traces: Cu: ≤5 mg/kg
• Cation Traces: Fe: ≤5 mg/kg
• Cation Traces: K: ≤50 mg/kg
• Cation Traces: Li: ≤5 mg/kg
• Cation Traces: Mg: ≤5 mg/kg
• Cation Traces: Mn: ≤5 mg/kg
• Cation Traces: Mo: ≤5 mg/kg
• Cation Traces: Ni: ≤5 mg/kg
• Cation Traces: Pb: ≤5 mg/kg
• Cation Traces: Sr: ≤5 mg/kg
• Cation Traces: Zn: ≤5 mg/kg
• Impurities: insoluble matter, passes filter test
• Impurities: ≤0.001% total nitrogen (N)
• λ: 0.5 M in H2O
• Linear Formula: Na2HPO4
• Loss on Drying: ≤0.1% loss on drying, 110 °C
• Product Line: BioUltra
• Purity: ≥99.5% (T)
• Absorption Wavelength: λ: 260 nm Amax: ≤0.025
• Absorption Wavelength: λ: 280 nm Amax: ≤0.020
• pKa: (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid) (25°C)
• pH: 8.8-9.4 (25 °C, 0.5 M in H2O)
• Solubility: H2O: soluble0.5 M at 20 °C, clear, colorless
• Personal Protective Equipment: Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter
• RTECS: WC4500000
• German water hazard class: 1

DETAILS

Description (English)

Other Notes
Primary standard buffer1

Description (简体中文)

Other Notes
Primary standard buffer1