Sodium phosphate monobasic monohydrate
Sodium phosphate monobasic monohydrate (CAS: 10049-21-5), with the formula NaH2PO4 · H2O and a molecular weight of 137.99 g/mol, is a white crystalline solid. This reagent-grade inorganic salt is highly soluble in water and is primarily utilised as a buffering agent and a laboratory reagent in various chemical and biochemical applications, including electrophoresis.
- IUPAC
- Monosodium phosphate,Sodium dihydrogen phosphate monohydrate
- Synonyms
- Monosodium phosphateSodium dihydrogen phosphate monohydrate

Buffering Agent
Sodium phosphate monobasic monohydrate is effective in creating and maintaining stable pH conditions in biochemical and chemical processes. Its buffering capacity is particularly useful in biological research and laboratory assays.
Electrophoresis Reagent
With low UV absorption at 260 nm and 280 nm, this compound is suitable for use in electrophoresis buffers. It helps to control the ionic strength and pH of the running buffer, ensuring efficient separation of biomolecules.
Chemical Synthesis
This salt serves as a source of phosphate ions in various chemical synthesis reactions. It is a fundamental reagent in inorganic and organic chemistry laboratories.
Laboratory Reagent
As a versatile laboratory reagent, it finds application in diverse analytical and experimental procedures. Its reliable properties make it a staple in research and development settings.
| Molecular weight | 137.99 |
|---|---|
| Linear formula | NaH2PO4 · H2O |
| Assay | ≥98%98.0-102.0% |
| Grade | Vetec™ reagent grade |
| Solubility | H2O: soluble1 M, clear, colorless |
| pH | 4.1-4.5 (25 °C, 5% in solution) |
| Impurities tested | ≤0.01% Insoluble matter |
| Suitability | suitable for electrophoresis |
| Water hazard class (WGK, DE) | 1 |
|---|---|
| Cation traces | Ca: ≤0.005%Fe: ≤0.001%K: ≤0.01%heavy metals (as Pb): ≤0.001% |
| Anion traces | chloride (Cl-): ≤5 ppmsulfate (SO42-): ≤0.003% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Uv Absorption | λ: 260 nm Amax: ≤0.03λ: 280 nm Amax: ≤0.02 |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Sodium phosphate monobasic monohydrate used for?
+
Sodium phosphate monobasic monohydrate (CAS: 10049-21-5) is primarily used as a buffering agent in biochemical and chemical applications, and it is also suitable for electrophoresis. It functions as a versatile laboratory reagent in various synthesis and analytical procedures.
What are the CAS number and chemical formula for Sodium phosphate monobasic monohydrate?
+
The CAS number for Sodium phosphate monobasic monohydrate is 10049-21-5, and its chemical formula is NaH2PO4 · H2O.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies Sodium phosphate monobasic monohydrate as Vetec™ reagent grade with an assay of ≥98% (98.0-102.0%). TSS does not represent this product as USP, BP, or EP grade.
How should Sodium phosphate monobasic monohydrate be handled?
+
Sodium phosphate monobasic monohydrate is classified with a WGK Germany of 1, indicating it is slightly hazardous to water. It is important to avoid dust formation and ensure adequate ventilation when handling. Consult the Safety Data Sheet for detailed handling and safety precautions.
Is Sodium phosphate monobasic monohydrate available for export?
+
Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including Sodium phosphate monobasic monohydrate. We cater to international shipping requirements.
How can I request a sample or quote for Sodium phosphate monobasic monohydrate?
+
To request a sample or a quote for Sodium phosphate monobasic monohydrate, please contact our sales team through the website or by phone. Provide the product name and CAS number (10049-21-5) for prompt service.
▶ Related products

1-(2-Fluorobenzyl)piperazine
C11H15FN2
Chemical Synthesis
1-(2-Fluorophenyl)biguanide hydrochloride
Chemical Synthesis

1-(2-Fluorophenyl)cyclopropanecarboxylic acid
C10H9FO2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine
C10H13FN2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine monohydrochloride
C10H13FN2 · HCl
Chemical Synthesis
1-(2-Furoyl)-1H-benzotriazole
C11H7N3O2
Chemical Synthesis
1-(2-Furoyl)piperazine
C9H12N2O2
Chemical Synthesis
1-(2-Hydroxy-5-methylphenyl)-3-phenyl-1,3-propanedione
Chemical Synthesis
▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis