Calcium dihydrogenphosphate
Calcium dihydrogenphosphate monohydrate (CAS: 7758-23-8), with the chemical formula Ca(H2PO4)2 · H2O, is a white crystalline solid with a molecular weight of 234.05 g/mol. This essential chemical compound serves as a valuable reagent in various laboratory applications and industrial processes, particularly where a source of calcium and phosphate is required. It is a key component in chemical synthesis and research.
- IUPAC
- Calcium bis(dihydrogenphosphate),Calcium phosphate monobasic,prim-Calcium phosphate

Laboratory Reagent
Utilised in scientific research and analytical chemistry as a source of calcium and phosphate ions. Its defined composition makes it suitable for experiments requiring precise chemical inputs.
Chemical Synthesis
Acts as a precursor or reactant in the synthesis of other calcium- and phosphate-containing compounds. It is employed in the development of novel materials and chemical entities.
Industrial Applications
May be used in specific industrial processes where the controlled addition of calcium and phosphate is necessary for product formulation or process chemistry.
| Molecular weight | 234.05 |
|---|---|
| Linear formula | Ca(H2PO4)2 · H2O |
| Assay | 15.9-17.7% |

Hazard statements
- H318Causes serious eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Water hazard class (WGK, DE) | 1 |
|---|---|
| Hazard codes (EU) | Xi |
| Risk statements (R) | 41 |
| Safety statements (S) | 26-39 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
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 Calcium dihydrogenphosphate used for?
+
Calcium dihydrogenphosphate monohydrate is primarily used as a laboratory reagent in research and analytical chemistry, and in chemical synthesis as a precursor for other compounds.
What are the CAS number and chemical formula for Calcium dihydrogenphosphate?
+
The CAS number is 7758-23-8 and the chemical formula is Ca(H2PO4)2 · H2O.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies Calcium dihydrogenphosphate monohydrate with an assay of 15.9-17.7%. We do not represent this product as USP, BP, or EP grade.
What are the primary safety concerns when handling Calcium dihydrogenphosphate?
+
This compound carries a 'Danger' signal word and is associated with Hazard Statement H318, causing serious eye damage. Appropriate personal protective equipment, including eye protection, should be worn.
How is Calcium dihydrogenphosphate packed and shipped by TSS?
+
Tech Serve Solutions expertly packs and exports fine chemicals, laboratory reagents, and pharmaceutical intermediates globally, adhering to all necessary shipping regulations.
How can I request a sample or quote for Calcium dihydrogenphosphate?
+
To request a sample or a quotation for Calcium dihydrogenphosphate, please contact our sales team through the website or by phone.
▶ Related products

Sodium bisulfate monohydrate
Salts

Aluminum acetate, basic
Salts

Aluminum fluoride
AlF3
Salts
Aluminum fluoride trihydrate
AlF3·3H2O
Salts
Aluminum hydroxide
Al(OH)3
Salts
Aluminum hydroxide hydrate
Al(OH)3 · xH2O
Salts
Aluminum iodide
AlI3
Salts
Aluminum metaphosphate
Al(PO3)3
Salts▶ 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