1.05108

Potassium dihydrogen phosphate

99.995% anhydrous basis, Suprapur^®

• Synonym(s): Potassium phosphate monobasic, mono-Potassium orthophosphate, Potassium biphosphate, Potassium phosphate monobasic, Monopotassium phosphate, Potassium dihydrogen phosphate, prim.-Potassium phosphate
• Linear Formula: KH₂PO₄
• CAS Number: 7778-77-0
• Molecular Weight: 136.09
• MDL number: MFCD00011401
• EC Index Number: 231-913-4

Properties

• grade: for inorganic trace analysis
• Quality Level: 100
• assay: ≥99.5% (alkalimetric); 99.995% anhydrous basis
• form: solid
• potency: >4640 mg/kg LD₅₀, skin (Rabbit)
• technique(s): HPLC: suitable
• pH: 4.2-4.6 (20 °C, 20 g/L in H₂O)
• mp: 252.6 °C (lit.)
• solubility: 208 g/L
• density: 2.338 g/mL at 25 °C (lit.)
• bulk density: 1200 kg/m³
• storage temp.: 2-30°C
• 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

50, 50 , 250 , 500 g in Plastic bottle

Linkage

Replaces: 5108-1; 5108-2; 5108

Analysis Note

Purity (metallic): ≥ 99.995 %
Assay (acidimetric): ≥ 99.5 %
Spec. Absorbance A at 260 nm (2 cm, 10%, water): ≤ 0.010
Chloride (Cl): ≤ 5 ppm
Sulfate (SO₄): ≤ 30 ppm
As (Arsenic): ≤ 0.1 ppm
Ba (Barium): ≤ 5.0 ppm
Ca (Calcium): ≤ 0.50 ppm
Cd (Cadmium): ≤ 0.005 ppm
Ce (Cerium): ≤ 0.010 ppm
Co (Cobalt): ≤ 0.010 ppm
Cu (Copper): ≤ 0.005 ppm
Eu (Europium): ≤ 0.010 ppm
Fe (Iron): ≤ 0.10 ppm
Hg (Mercury): ≤ 0.05 ppm
La (Lanthanum): ≤ 0.010 ppm
Mg (Magnesium): ≤ 0.50 ppm
Mn (Manganese): ≤ 0.010 ppm
Na (Sodium): ≤ 20.0 ppm
Ni (Nickel): ≤ 0.010 ppm
Pb (Lead): ≤ 0.005 ppm
Sm (Samarium): ≤ 0.010 ppm
Sr (Strontium): ≤ 0.50 ppm
Tl (Thallium): ≤ 0.01 ppm
Y (Yttrium): ≤ 0.010 ppm
Yb (Ytterbium): ≤ 0.010 ppm
Zn (Zinc): ≤ 0.005 ppm

Legal Information

SUPRAPUR is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• Storage Class Code: 13 - Non Combustible Solids
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable