Calcium dihydrogen phosphate
Calcium bis(dihydrogen phosphate)
CAS: 7758-23-8
Molecular Formula: Ca(H2PO4)2
Calcium dihydrogen phosphate - Names and Identifiers
| Name | Calcium bis(dihydrogen phosphate) |
| Synonyms | Monocalcium Phosphate Calcium tetrahydrogen calcium dihydrophosphate Calcium dihydrogenphoshate Calcium dihydrogen phosphate Calcium Dihydrogen Orthophosphate Calcium bis(dihydrogen phosphate) calcium dihydrogen phosphate hydrate Calcium phosphate monobasic monohydrate Calcium bis(dihydrogenphosphate) Monohydrate |
| CAS | 7758-23-8 |
| EINECS | 231-837-1 |
| InChI | InChI=1/Ca.H3O4P.H2O/c;1-5(2,3)4;/h;(H3,1,2,3,4);1H2/q+2;;/p-1 |
Calcium dihydrogen phosphate - Physico-chemical Properties
| Molecular Formula | Ca(H2PO4)2 |
| Molar Mass | 234.05 |
| Water Solubility | insoluble |
| Appearance | Colorless crystalline powder |
| Storage Condition | Room Temprature |
| MDL | MFCD00010898 |
| Physical and Chemical Properties | Colorless triclinic crystal or white crystalline powder. The relative density of 2.22(16/4 ℃) soluble in hydrochloric acid, nitric acid, slightly soluble in cold water, almost insoluble in ethanol. |
| Use | For refractory industry, sewage treatment, etcUsed as food leavening agent and calcium fortifier, wine flavoring agent, fermentation accelerator, etc |
Calcium dihydrogen phosphate - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection |
Calcium dihydrogen phosphate - Upstream Downstream Industry
| Raw Materials | Phosphoric acid Calcium oxide Calcium carbonate |
Calcium dihydrogen phosphate - Nature
Open Data Verified Data
colorless tri-rant flaky, granular or crystalline powder. Strongly acidic. Crystal water at 100 C, 200 C when the decomposition. Slightly soluble in water, soluble in dilute hydrochloric acid, nitric acid and acetic acid.
Last Update：2024-01-02 23:10:35
Calcium dihydrogen phosphate - Preparation Method
Open Data Verified Data
prepared by crystallization of dicalcium phosphate or tricalcium phosphate after dissolution in phosphoric acid.
Last Update：2022-01-01 09:04:19
Calcium dihydrogen phosphate - Introduction
Pure does not absorb moisture, but contains trace impurities, such as phosphoric acid can deliquesce. It is strongly acidic. The crystal water is lost at 100 ℃ and decomposed at 200 ℃. Slightly soluble in water, soluble in dilute hydrochloric acid, nitric acid and acetic acid.
Last Update：2022-10-16 17:28:40
Calcium dihydrogen phosphate - Use
Open Data Verified Data
feed additives widely used in aquaculture animals and blind poultry. The addition amount in the feed is generally 1% ~ 2%.
Last Update：2022-01-01 09:04:19
Calcium dihydrogen phosphate - Content analysis
about 150g of a sample dried at 0.7 ° C. For 4H was accurately weighed, and 20ml of dilute hydrochloric acid solution (TS-117) was added, then boiled, cooled, and water was added. The content of Calcium dihydrogen phosphate (05212) was determined by analytical method. Each ml of 0.02mol/L EDTA solution corresponds to 4.321mg of acidic calcium pyrophosphate (CaH2P2O7).
Last Update：2024-04-10 22:29:15
Calcium dihydrogen phosphate - Production method
lime method
food grade phosphoric acid is neutralized with lime and the end point is controlled to be Ph 3.2, which is Calcium dihydrogen phosphate.
CaCO3 2H3P04→Ca(H2PO4)2 H20 CO2↑
calcium hydrogen phosphate method
by food grade calcium hydrogen phosphate or food grade tricalcium phosphate and food grade phosphoric acid solution neutralization, control end point for the pH value of 3.2; And then concentrated, crystallized products.
CaHPO4 H3P04→Ca(H2PO4)2
Other
calcium hydrogen phosphate was prepared from phosphoric acid and calcium carbonate and heated to 200 °c.
Calcium dihydrogen phosphate was obtained by neutralizing industrial grade phosphoric acid with milk of lime and controlling the terminal pH to 3.2.
The reaction solution was concentrated, crystallized, aged and dried to obtain a product.
Last Update：2024-04-10 22:29:15
Calcium dihydrogen phosphate - Identification Experiment
- take 0.5g of sample, Add 10ml of water to shake and mix, and the solution should be acidic.
- take 0.2g of sample, add 5ml of dilute nitric acid test solution (TS-158), heat and dissolve, add 2ml of ammonium molybdate test solution (TS-22), and yellow precipitate should be produced after warming.
- take 0.3g of sample, add 9ml of water and 1ml of dilute hydrochloric acid test solution (Ts-117), warm and dissolve, cool and filter, add 3ml of ammonium oxalate test solution (TS-24) to the filtrate, which should produce white precipitate, 5ml of dilute hydrochloric acid test solution was added, and the precipitate was dissolved.
Last Update：2024-04-10 22:29:15
Calcium dihydrogen phosphate - Limit of use
ADI 0-70mg/kg (total phosphate amount in terms of phosphorus, FAO/WHO,2001).
GRAS(FDA,& sect;182.5223,2000).
Last Update：2024-04-09 21:21:28
Calcium dihydrogen phosphate - Preparation Method
calcium hydrogen phosphate method
neutralized by food-grade calcium hydrogen phosphate or food-grade tricalcium phosphate and food-grade phosphoric acid solution, and the end point is controlled as pH 3.2; The product is obtained by concentration and crystallization;
CaHPO4 H3P04→Ca(H2PO4)2
lime method
food grade phosphoric acid is neutralized with lime and the end point is controlled to be Ph 3.2, which is Calcium dihydrogen phosphate.
CaCO3 2H3P04→Ca(H2PO4)2 H20 CO2↑
Last Update：2024-04-09 20:52:54
Calcium dihydrogen phosphate - Use
- used in refractory industry, sewage treatment, used as food leavening agent and calcium fortifier, wine flavoring agent, fermentation accelerator, etc.
- widely used in aquaculture animals and livestock and poultry animal feed additives.
- used as analytical reagent and plastic fixative
- used as a plastic stabilizer and an additive for the production of glass, used in the food industry as a baking powder starter, yeast feed, calcium nutritional supplement and coagulant
- as a quality improver, it has an effect of increasing the complexing metal ions, pH, increasing the ionic strength, etc. of a food, thereby improving the adhesion and water holding capacity of the food. China's provisions can be used for steamed bread, bread, biscuits dough fermentation, the maximum use (in phosphoric acid) 4g/kg.
- Calcium dihydrogen phosphate is used as a leavening agent, dough regulator, buffer, nutritional supplement, emulsifier, stabilizer and other quality improvers, which can improve the complexing metal ions, pH value and ionic strength of food, the adhesion and water holding capacity of food products can be improved. For flour, cakes, cakes, baked goods, fried foods, biscuits, milk powder, cold drinks, ice cream, etc. China provides for bread, biscuits, baking powder, the maximum use of 4.0g/kg (phosphoric acid); Solid beverage 8.0g/kg; Wheat flour can be used according to the production needs of the right amount
- nutritional supplement, leavening agent. This product is equivalent to 1g of calcium 0.1855g. When used for special nutritious food, the usage amount is less than 1% of food (calculated as calcium, or less than 5.4% of this product). The acidic component, which is used as a synthetic leavening agent in the manufacture of baked foods such as bread, is hardly soluble in water and is suitable for use as a slow-acting leavening agent. 2g per g of sodium bicarbonate was used.
Last Update：2024-04-09 20:52:54
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Raw Materials for Calcium dihydrogen phosphate