Molekula
Potassium dihydrogen phosphate (Monobasic) - Pharma grade
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Potassium dihydrogen phosphate (monobasic) is a white crystalline salt used as a buffering agent, pH adjuster, and nutrient in pharmaceutical formulations, fermentation media, and analytical chemistry. It is also employed in food preservation and as a source of phosphorus and potassium in medical and nutritional applications. This pharma-grade chemical has a CAS number of 7778-77-0, with the molecular formula KH2PO4 and a molecular weight of 136.08. It is stored at ambient conditions but requires careful handling due to its hazardous classification, marked by the signal word "Danger." Molekula supplies Potassium dihydrogen phosphate (monobasic) from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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Specifications
| Property | Value |
|---|---|
| Appearance | White crystalline powder |
| Identification | Test A (NF):Pass. Test B (NF): Pass. Test A (EP/BP): Pass. Test B (EP/BP):Pass. Test C (EP/BP): Pass. |
| pH | 4.2-4.5 |
| Chloride (Cl-) | ≤200ppm |
| Appearance of Solution | Passes test |
| Residual Solvents | Conforms to NF |
| Reducing Substances | Pass |
| Insoluble Substance | ≤0.2% |
| Total Coliforms | Negative |
| Iron (Fe) | ≤10ppm |
| Total aerobic plate count | 10³ cfu/g Maximum |
| Lead (Pb) | ≤5ppm |
| Identification (IR) | Conforms to structure |
| Arsenic (As) | ≤2ppm |
| Assay (EP, BP) | 98.0%-100.5% |
| Sodium (Na) | ≤1000ppm |
| Sulphates (SO4)(2-) | ≤300ppm |
| Fluoride (F-) | ≤0.001% |
| LOD (EP/BP) | ≤2.0% |
| LOD (NF) | ≤1.0% |
| Assay (NF) | 98.0%-100.5% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 6.1 |
| Packing Group | III |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White tetragonal crystals |
| Odour | Odorless |
| Melting Point | 253 °C |
| Density | 2.34 g/cm³ |
| Solubility (other solvents) | Soluble in about 4.5 parts water; insoluble in alcohol |
| Refractive Index | 1.5093 |
Source: PubChem CID 516951 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 90033259 |
| CAS Number | 7778-77-0 |
| IUPAC Name | potassium dihydrogen phosphate |
| EC Number | 231-913-4 |
| Molecular Formula | KH2PO4 |
| Molecular Weight | 136.08 |
| Exact Mass | 135.9328 |
| SMILES | OP(=O)(O)[O-].[K+] |
| InChIKey | GNSKLFRGEWLPPA-UHFFFAOYSA-M |
| InChI | InChI=1S/K.H3O4P/c;1-5(2,3)4/h;(H3,1,2,3,4)/q+1;/p-1 |
| PubChem CID | 516951 |
| UN Number | UN3288 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2835.24.0000 |
| Tariff Code | 2835240000 |
Safety & GHS
-
Toxic
GHS06
Hazard statements
- H302 Harmful if swallowed
- H331 Toxic if inhaled
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P271 Use only outdoors or in a well-ventilated area
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P284 Wear respiratory protection
- P301+330 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
Documents
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is potassium dihydrogen phosphate (monobasic) used for in pharma applications?
It is commonly used as a buffer in pharmaceutical formulations, pH adjuster in injectables, and an electrolyte replenisher in IV solutions.
What is the chemical formula and molecular weight of potassium dihydrogen phosphate (monobasic)?
The formula is **KH₂PO₄**, and the molecular weight is **136.08 g/mol**.
What safety classification does this product have?
The product is labeled with the **Signal Word: Danger** due to its hazardous properties.
How should potassium dihydrogen phosphate (monobasic) be stored?
Store in a tightly sealed container at **ambient temperature**, away from moisture and incompatible substances.
Does Molekula supply this product in bulk quantities for pharma-grade applications?
Yes, we offer **bulk supply** of potassium dihydrogen phosphate (monobasic) in pharma grade, with flexible packaging options.
What documentation is provided with a pharma-grade order of potassium dihydrogen phosphate?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **Batch-specific documentation** for traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.