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60220 Sigma-Aldrich

Potassium phosphate monobasic

buffer substance, anhydrous, puriss. p.a., ACS reagent, reag. ISO, Reag. Ph. Eur., 99.5-100.5%

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

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Properties

Related Categories Analytical Reagents, Analytical Reagents for General Use, Analytical/Chromatography, Essential Chemicals, O-P, Puriss p.a. ACS,
Quality Level   100
grade   ACS reagent
  Reag. Ph. Eur.
  anhydrous
  reag. ISO
  puriss. p.a.
assay   99.5-100.5%
form   crystalline
impurities   ≤0.001% total nitrogen (N)
loss   ≤0.2% loss on drying, 105 °C
pH   4.2-4.5 (20 °C, 5%)
pKa (25 °C)   (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
mp   252.6 °C (lit.)
solubility   water: 0.5 g/10 mL, clear, colorless to light yellow
density   2.338 g/mL at 25 °C (lit.)
anion traces   chloride (Cl-): ≤5 mg/kg
  sulfate (SO42-): ≤30 mg/kg
cation traces   As: ≤0.5 mg/kg
  Ca: ≤10 mg/kg
  Cd: ≤5 mg/kg
  Co: ≤5 mg/kg
  Cr: ≤15 mg/kg
  Cu: ≤5 mg/kg
  Fe: ≤5 mg/kg
  Mg: ≤5 mg/kg
  Mn: ≤5 mg/kg
  Na: ≤50 mg/kg
  Ni: ≤5 mg/kg
  Pb: ≤5 mg/kg
  Zn: ≤5 mg/kg
  heavy metals: ≤0.001% (by ICP-OES)
SMILES string   [K+].OP(O)([O-])=O
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

Description

Packaging

1, 2.5 kg in poly bottle

500 g in poly bottle

Safety & Documentation

Safety Information

RIDADR 
NONH for all modes of transport
WGK Germany 
WGK 1
RTECS 
TC6615500

Documents

Certificate of Analysis (COA)

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Protocols & Articles
Peer-Reviewed Papers
15

References

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