PX1565

Potassium phosphate monobasic

Meets ACS Specifications, Meets Reagent Specifications for testing USP/NF monographs GR ACS

• Synonym(s): Potassium Dihydrogen Phosphate, Monopotassium phosphate, Potassium dihydrogen phosphate, prim.-Potassium phosphate
• Linear Formula: KH₂PO₄
• CAS Number: 7778-77-0
• Molecular Weight: 136.09
• MDL number: MFCD00011401
• UNSPSC Code: 12352302
• EC Index Number: 231-913-4

Properties

• agency: meets USP/NF
• Quality Level: 200
• assay: ≥99% (acidimetric)
• form: crystals
• impurities: ≤0.01% Insoluble matter
• loss: ≤ 0.2% loss on drying, 105°C
• color: white
• pH: 4.2-4.6 (20 °C, 20 g/L in H₂O)
• mp: 252.6 °C (lit.)
• solubility: soluble 208 g/L
• density: 2.338 g/mL at 25 °C (lit.)
• anion traces: chloride (Cl^-): ≤0.001%; sulfate (SO₄^2-): ≤0.003%
• cation traces: Fe: ≤0.002%; Na: ≤0.005%; heavy metals: ≤0.001%
• shipped in: ambient
• storage temp.: room temp
• 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

Application

Meets ACS Specifications, Meets Reagent Specifications for testing USP/NF monographs GR ACS

Analysis Note

Assay (acidimetric)99.0% minChloride (Cl)0.001% maxColorWhiteFormCrystalsHeavy Metals (by ICP-OES)0.001% maxInsoluble matter0.01% maxIron (Fe)0.002% maxLoss on drying (105°C)0.2% maxSodium (Na)0.005% maxSulfate (SO4)0.003% maxpH of a 5% solution at 25°C4.1-4.5

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable