磷酸氢二钠二水合物，Sodium phosphate dibasic dihydrate；puriss. p.a., reag. Ph. Eur., 98.5-101.0% (calc. to the dried substance)

Agency

USP/NF
reag. Ph. Eur.

质量水平

200

等级

puriss. p.a.

测定

98.5-101.0% (calc. to the dried substance)

形式

crystals

杂质

reducing impurities, complies
≤0.0005% heavy metals (as Pb)
≤0.001% total nitrogen (N)
≤0.5% NaH₂PO₄ (calc. to dried subst.)

缺失

19.5-21.0% loss on drying, 130 °C

pH值（酸碱度）

9.0-9.2 (20 °C, 5%)

痕量阴离子

chloride (Cl^-): ≤10 mg/kg
sulfate (SO₄^2-): ≤50 mg/kg

痕量阳离子

As: ≤0.5 mg/kg
Fe: ≤5 mg/kg
K: ≤50 mg/kg

适用性

in accordance for appearance of solution

SMILES string

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

InChI

1S/2Na.H3O4P.2H2O/c;;1-5(2,3)4;;/h;;(H3,1,2,3,4);2*1H2/q2*+1;;;/p-2

InChI key

KDQPSPMLNJTZAL-UHFFFAOYSA-L