Potassium phosphate monobasic
SIAL/795488 - anhydrous, free-flowing, Redi-Dri™, ACS reagent, ≥99%
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
Free-flowing salts
Loss on Drying Graph
Redi-Dri free-flowing salts
The Redi-Dri™ packaging system eliminates the common issue of clumping that is noted with many hygroscopic salts and buffers and provides free-flowing, ready-to- use material at all times.
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 795488-500G
This image depicts SKU: 795488-500G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 795488-1KG
This image depicts SKU: 795488-1KG
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 795488-2.5KG
This image depicts SKU: 795488-2.5KG
| anion traces | chloride (Cl-): ≤0.001% |
| sulfate (SO42-): ≤0.003% | |
| assay | ≥99% |
| cation traces | Fe: ≤0.002% |
| heavy metals: ≤0.001% (by ICP) | |
| Na: ≤0.005% | |
| density | 2.338 g/mL at 25 °C (lit.) |
| form | powder or crystals |
| grade | ACS reagent |
| anhydrous | |
| impurities | ≤0.01% Insoluble matter |
| InChI | 1S/K.H3O4P/c;1-5(2,3)4/h; |
| InChI key | GNSKLFRGEWLPPA-UHFFFAOYSA |
| loss | ≤0.2% loss on drying, 105°C |
| mp | 252.6 °C (lit.) |
| pH | 4.1-4.5 (25 °C, 5%) |
| pKa (25 °C) | (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid) |
| product line | Redi-Dri™ |
| quality | free-flowing |
| Quality Level | 200  |
| SMILES string | [K+].OP(O)([O-])=O |
| Application: | Potassium phosphate monobasic has been used in the preparation of phosphate buffer and phosphate buffered saline (PBS). It has also been used in the preparation of PEG1000 (polyethylene glycol)/potassium phosphate aqueous two-phase systems (ATPS). |
| Features and Benefits: | • Increased efficiency – Eliminate time and effort of loosening hardened powders • Safety – Avoid risks of using tools of force to break up clumps • Economy – Faster preparation and solvation increase productivity and reduce costs • Assured quality – Excellent, expert-tested quality with no anti-caking agents • Flexible volumes – Available from research amounts to scale-up quantities |
| General description: | Potassium phosphate monobasic (monopotassium orthophosphate) is a water soluble inorganic salt. Its standard enthalpy of formation has been reported to be Redi-Dri™ technology eliminates clumping and the need for complicated procedures to keep your salts free-flowing. Keeping your salts dry helps improve your results by giving accurate measurements and easier-to-handle salts and buffers. Rather than drying your salts in an oven or desiccator or breaking them apart manually, Redi-Dri™ ensures that your salts will remain easy-to-use for months without worrying about anti-caking agents. Even after repeated openings you can be assured that your results are always accurate. Redi-Dri™ saves you time, energy and money by keeping your salts usable for longer! |
| Legal Information: | Redi-Dri is a trademark of Sigma-Aldrich Co. LLC |
| Packaging: | 1, 2.5 kg in poly bottle |
| Packaging: | 500 g in poly bottle |
| RIDADR | NONH for all modes of transport |
| WGK Germany | WGK 1 |
| Purity | ≥99% |
| mp | 252.6 °C (lit.) |
| Density | 2.338 g/mL at 25 °C (lit.) |
| UNSPSC | 12352300 |