Potassium phosphate monobasic
SIGMA/60218 - BioUltra, for molecular biology, anhydrous, ≥99.5% (T)
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
λ | 1 M in H2O |
anion traces | chloride (Cl-): ≤5 mg/kg |
sulfate (SO42-): ≤30 mg/kg | |
assay | ≥99.5% (T) |
cation traces | Al: ≤5 mg/kg |
As: ≤0.1 mg/kg | |
Ba: ≤5 mg/kg | |
Bi: ≤5 mg/kg | |
Ca: ≤10 mg/kg | |
Cd: ≤5 mg/kg | |
Co: ≤5 mg/kg | |
Cr: ≤5 mg/kg | |
Cu: ≤5 mg/kg | |
Fe: ≤5 mg/kg | |
Li: ≤5 mg/kg | |
Mg: ≤5 mg/kg | |
Mn: ≤5 mg/kg | |
Mo: ≤5 mg/kg | |
Na: ≤50 mg/kg | |
Ni: ≤5 mg/kg | |
Pb: ≤5 mg/kg | |
Sr: ≤5 mg/kg | |
Zn: ≤5 mg/kg | |
density | 2.338 g/mL at 25 °C (lit.) |
form | powder or crystals |
grade | for molecular biology |
impurities | DNases, none detected |
insoluble matter, passes filter test | |
phosphatases, none detected | |
proteases, none detected | |
RNases, none detected | |
≤0.001% total nitrogen (N) | |
InChI | 1S/K.H3O4P/c;1-5(2,3)4/h; |
InChI key | GNSKLFRGEWLPPA-UHFFFAOYSA |
mp | 252.6 °C (lit.) |
pH | 4.0-4.5 (25 °C, 1 M in H2O) |
pKa (25 °C) | (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid) |
product line | BioUltra |
Quality Level | 200 |
SMILES string | [K+].OP(O)([O-])=O |
solubility | H2O: 1 M at 20 °C, clear, colorless |
UV absorption | λ: 260 nm Amax: 0.050 |
λ: 280 nm Amax: 0.045 |
Application: | Potassium phosphate monobasic and dibasic, are used to create phosphate buffered solutions such as potassium phosphate buffered water and saline solutions used in biological applications. |
Other Notes: | Component of PBS - in the isolation and analysis of nuclear RNA |
RIDADR | NONH for all modes of transport |
WGK Germany | WGK 1 |
Flash Point(F) | Not applicable |
Flash Point(C) | Not applicable |
Purity | ≥99.5% (T) |
mp | 252.6 °C (lit.) |
Density | 2.338 g/mL at 25 °C (lit.) |
UNSPSC | 12161700 |