Sodium phosphate dibasic

• Catalog No.: 04276
• CAS Number: 7558-79-4
• M. F.: HNa2O4P
• M. W.: 141.958841
• Purity: 98-100.5% (calc. to the dried substance)

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
• PubChem SID: 24845716
• CAS Number: 7558-79-4
• MDL Number: MFCD00003496

PROPERTIES

• Antion Traces: chloride (Cl-): ≤50 mg/kg
• Antion Traces: fluoride (F-): ≤10 mg/kg
• Antion Traces: sulfate (SO42-): ≤200 mg/kg
• Cation Traces: As: ≤2 mg/kg
• Cation Traces: Cd: ≤1 mg/kg
• Cation Traces: Cu: ≤10 mg/kg
• Cation Traces: Fe: ≤20 mg/kg
• Cation Traces: Hg: ≤1 mg/kg
• Cation Traces: Pb: ≤4 mg/kg
• Cation Traces: Zn: ≤10 mg/kg
• Grade: puriss.
• Impurities: reducing matter, complies
• Impurities: residual solvents, complies
• Impurities: ≤0.001% heavy metals (as Pb)
• Impurities: ≤0.002% ammonium (NH4)
• Impurities: ≤0.2% water-insoluble matter
• Impurities: ≤1% NaH2PO4(calc. to dried subst.)
• Impurities: ≤2.0% pyrophosphate (as Na4P2O7)
• Linear Formula: Na2HPO4
• Loss on Drying: ≤1% loss on drying, 105°C, 4h
• Loss on Drying: ≤1% loss on drying, 130 °C
• Purity: 98-100.5% (calc. to the dried substance)
• Quality: meets analytical specification of Ph. Eur., BP, USP, FCC, E 339
• Suitability: complies for appearance of solution
• pKa: (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid) (25°C)
• pH: 8.4-9.6 (20 °C, 1%)
• Personal Protective Equipment: Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter
• RTECS: WC4500000
• German water hazard class: 1