磷酸二氢钾 一元

anhydrous

200

98-100.5% (calc. to the dried substance)

crystalline

meets analytical specification of Ph. Eur., NF, E340

residual solvents, complies, ≤0.04% KMnO₄ red. matter (as O), ≤0.2% in water insoluble matters, ≤10 mg/kg heavy metals (as Pb)

≤1% loss on drying, 130 °C

4.2-4.5 (20 °C, 5%)

(1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)

252.6 °C (lit.)

H₂O: soluble 4.5 parts, alcohol: insoluble

2.338 g/mL at 25 °C (lit.)

chloride (Cl^-): ≤0.001%, fluoride (F^-): ≤10 mg/kg, sulfate (SO₄^2-): ≤200 mg/kg

As: ≤1 mg/kg, Cd: ≤1 mg/kg, Fe: ≤10 mg/kg, Hg: ≤1 mg/kg, Na: ≤0.1%, Pb: ≤1 mg/kg

complies for appearance of solution

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

1S/K.H3O4P/c;1-5(2,3)4/h;(H3,1,2,3,4)/q+1;/p-1

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