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| CAS No.: | 7758-23-8 |
|---|---|
| Name: | Calcium dihydrogen orthophosphate |
| Molecular Structure: | |
|
|
|
| Formula: | Ca.(H2PO4)2 |
| Molecular Weight: | 234.05 |
| Synonyms: | Acidcalcium phosphate;C 38;C 38 (phosphate);Calcium biphosphate;Calciumbis(dihydrogen phosphate);Calcium bis(orthophosphate);Calcium dihydrogenorthophosphate;Calcium dihydrogen phosphate;Calcium diorthophosphate;Calciumhydrogen phosphate (Ca(H2PO4)2);Calcium hydrogen phosphate (CaH4(PO4)2);Calcium monobasic phosphate;Calcium orthophosphate monobasic;Calcium phosphate(1:2);Calcium phosphate (Ca(H2PO4)2);Calcium phosphate (CaH4(PO4)2);Calciumphosphate monobasic;Calcium phosphate, primary;Calcium primary phosphate;Calcium superphosphate;Calcium tetrahydrogen orthophosphate;Calciumtetrahydrogen phosphate;HT Monocalcium Phosphate;Monobasic calcium phosphate;Monocalcium dihydrogen phosphate;Monocalcium orthophosphate;Monocalciumphosphate;Monocalcium phosphate (Ca(H2PO4)2);Monocalcium phosphate[CaH4(PO4)2];V 90;MDCP-Mono Dicalcium Phosphate;Calcium phosphate,monobasic; |
| EINECS: | 231-837-1 |
| Density: | 2.22（16/4 °C） |
| Boiling Point: | 158 °C at 760 mmHg |
| Solubility: | insoluble in water |
| Appearance: | white crystalline powder |
| Hazard Symbols: |
 Xi
|
| Risk Codes: | 36/37/38 |
| Safety: | 26-36/37-37/39 |
| PSA: | 180.80000 |
| LogP: | -0.98080 |
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Chemistry
IUPAC Name: Calcium dihydrogen phosphate
Molecular Formula: Ca(H2PO4)2
Molecular Weight: 234.0525 g/mol
EINECS: 231-837-1
Density : 2.22 (16/4 °C)
Water Solubility: Insoluble
Boiling Point: 158 °C at 760 mmHg
Vapour Pressure: 1.41 mmHg at 25 °C
Stability: Stable. Incompatible with strong acids
Appearance: White crystalline powder
Structure of Calcium dihydrogenphoshate (CAS NO.7758-23-8):
Product Category of Calcium dihydrogenphoshate (CAS NO.7758-23-8): Inorganics
Production
Calcium dihydrogenphoshate (CAS NO.7758-23-8) is derived by the reaction of Phosphoric acid and Calcium carbonate at 200°C.
Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| mouse | LD50 | oral | 15250mg/kg (15250mg/kg) | Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 52(12), Pg. 87, 1987. | |
| rabbit | LD50 | skin | > 2gm/kg (2000mg/kg) | SKIN AND APPENDAGES (SKIN): "DERMATITIS, OTHER: AFTER SYSTEMIC EXPOSURE" | National Technical Information Service. Vol. OTS0571950, |
| rat | LD50 | oral | 3986mg/kg (3986mg/kg) | SENSE ORGANS AND SPECIAL SENSES: PTOSIS: EYE BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) SKIN AND APPENDAGES (SKIN): HAIR: OTHER | National Technical Information Service. Vol. OTS0571950, |
Safety Profile
Hazard Codes: 
Xi
Risk Statements: 36/37/38
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection.
Safety Statements: 26-36/37/39
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection.
WGK Germany: 2
RTECS: TB8527000
Specification
Calcium dihydrogenphoshate , its cas register number is 7758-23-8. It also can be called Calcium superphosphate ; and Acid calcium phosphate . Calcium dihydrogenphoshate (CAS NO.7758-23-8), a major component of phosphate rock such as phosphorite,apatite, and other phosphate minerals, is too insoluble to be an efficient fertilizer. The result is hydrated to turn the calcium sulfate into the dihydrate gypsum and sold as superphosphate of lime. Alternately phosphate rock may be treated with phosphoric acid to produce a purer form of monocalcium phosphate and is sold as triple phosphate.