碳酸氢钠

等级

puriss.

质量水平

200

检测方案

99.0-100.5%

形式

powder

质量

meets analytical specification of Ph. Eur., BP, USP, FCC, E500

杂质

ammonia (NH₃), in accordance
organic volatile impurities, complies
residual solvents, complies
water-insoluble matter, complies
≤0.002% ammonium (NH₄), complies

缺失

≤0.2% loss on drying (silica gel)

pH值（酸碱度）

≤8.6 (20 °C, 5%)

pKa (25 °C)

(1) 6.37, (2) 10.25 (carbonic acid)

密度

2.16 g/mL at 25 °C (lit.)

痕量阴离子

carbonate (CO₃^2-): in accordance
chloride (Cl^-): ≤100 mg/kg
sulfate (SO₄^2-): ≤100 mg/kg

痕量阳离子

Al: ≤0.5 mg/kg
As: ≤2 mg/kg
Ca: ≤100 mg/kg
Fe: ≤10 mg/kg
Hg: ≤1 mg/kg
K: ≤100 mg/kg
Pb: ≤2 mg/kg

适用性

complies for appearance of solution

SMILES string

[Na+].OC([O-])=O

InChI

1S/CH2O3.Na/c2-1(3)4;/h(H2,2,3,4);/q;+1/p-1

InChI key

UIIMBOGNXHQVGW-UHFFFAOYSA-M