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Potassium phosphate monobasic

SIGALD/04243 - meets analytical specification of Ph. Eur., NF, E340, anhydrous, 98-100.5% (calc. to the dried substance)

Synonym: Monopotassium phosphate; Potassium dihydrogen phosphate; prim.-Potassium phosphate

CAS Number: 7778-77-0
Empirical Formula (Hill Notation): H2KO4P
Molecular Weight: 136.09
EC Number: 231-913-4
MDL Number: MFCD00011401
Linear Formula: KH2PO4
Product Type: Chemical

Catalog Number PKG Qty. Price Quantity
45-04243-500G 500 g
$92.10
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45-04243-1KG 1 kg
$175.00
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45-04243-6X1KG 1 kg
$310.00
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45-04243-5KG 5 kg
$272.00
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45-04243-4X5KG 5 kg
$847.00
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anion traces chloride (Cl-): ≤10 mg/kg
  fluoride (F-): ≤10 mg/kg
  sulfate (SO42-): ≤200 mg/kg
assay 98-100.5% (calc. to the dried substance)
cation traces As: ≤2 mg/kg
  Cd: ≤1 mg/kg
  Cu: ≤20 mg/kg
  Fe: ≤10 mg/kg
  Hg: ≤1 mg/kg
  Na: ≤1000 mg/kg
  Pb: ≤4 mg/kg
  Zn: ≤20 mg/kg
density 2.338 g/mL at 25 °C (lit.)
form crystalline
grade anhydrous
impurities org. volatile impurities, complies (GC)
  residual solvents, complies
  ≤0.001% heavy metals (as Pb)
  ≤0.04% KMnO4 red. matter (as O)
  ≤0.2% in water insoluble matters
InChI 1S/K.H3O4P/c;1-5(2,3)4/h;(H3,1,2,3,4)/q+1;/p-1
InChI key GNSKLFRGEWLPPA-UHFFFAOYSA-M
loss ≤1% loss on drying, 130 °C
mp 252.6 °C (lit.)
pH 4.2-4.5 (20 °C, 5%)
pKa (25 °C) (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
quality meets analytical specification of Ph. Eur., NF, E340
Quality Level 200 
SMILES string [K+].OP(O)([O-])=O
solubility alcohol: insoluble
  H2O: soluble 4.5 parts
suitability complies for appearance of solution
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