磷酸钠 二元

• 产品号: 04276
• CAS号: 7558-79-4
• 分子式: HNa2O4P
• 分子量: 141.958841
• 纯 度: 98-100.5% (calc. to the dried substance)

产品别名

• 标题: Sodium phosphate dibasic
• IUPAC标准名: disodium hydrogen phosphate
• IUPAC传统名: disodium hydrogen phosphate
• 别名: 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

产品登记号

• EC号: 231-448-7
• PubChem SID: 24845716
• CAS号: 7558-79-4
• MDL号: MFCD00003496

产品性质

• 痕量阴离子: chloride (Cl-): ≤50 mg/kg
• 痕量阴离子: fluoride (F-): ≤10 mg/kg
• 痕量阴离子: sulfate (SO42-): ≤200 mg/kg
• 痕量阳离子: As: ≤2 mg/kg
• 痕量阳离子: Cd: ≤1 mg/kg
• 痕量阳离子: Cu: ≤10 mg/kg
• 痕量阳离子: Fe: ≤20 mg/kg
• 痕量阳离子: Hg: ≤1 mg/kg
• 痕量阳离子: Pb: ≤4 mg/kg
• 痕量阳离子: Zn: ≤10 mg/kg
• 级别: puriss.
• 杂质: reducing matter, complies
• 杂质: residual solvents, complies
• 杂质: ≤0.001% heavy metals (as Pb)
• 杂质: ≤0.002% ammonium (NH4)
• 杂质: ≤0.2% water-insoluble matter
• 杂质: ≤1% NaH2PO4(calc. to dried subst.)
• 杂质: ≤2.0% pyrophosphate (as Na4P2O7)
• 线性分子式: Na2HPO4
• 干燥失重: ≤1% loss on drying, 105°C, 4h
• 干燥失重: ≤1% loss on drying, 130 °C
• 纯度: 98-100.5% (calc. to the dried substance)
• 品质说明: meets analytical specification of Ph. Eur., BP, USP, FCC, E 339
• 适用性: complies for appearance of solution
• pKa: (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid) (25°C)
• pH值: 8.4-9.6 (20 °C, 1%)
• 个人保护装置: Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter
• RTECS编号: WC4500000
• 德国WGK号: 1