calcium dihydrogen diphosphate
Calcium Pyrophosphate
CAS: 7790-76-3;10086-45-0
Molecular Formula: Ca2O7P2
calcium dihydrogen diphosphate - Names and Identifiers
| Name | Calcium Pyrophosphate |
| Synonyms | CPP HSDB 1435 UNII-X69NU20D19 CALCIUM DIPHOSPHATE Calcium diphosphate CALCIUM PYROPHOSPHATE Calcium Pyrophosphate Dicalcium diphosphate DICALCIUM PYROPHOSPHATE Dicalcium pyrophosphate CALCIUM PHOSPHATE (PYRO) calciumphosphate(ca2p2o7) alpha-Calcium pyrophosphate Calcium phosphate (Ca2P2O7) Diphosphoricacid,calciumsalt calciumpyrophosphate(ca2p2o7) calcium dihydrogen diphosphate Calcium pyrophosphate (Ca2P2O7) |
| CAS | 7790-76-3 10086-45-0 |
| EINECS | 232-221-5 |
| InChI | InChI=1/Ca.H4O7P2/c;1-8(2,3)7-9(4,5)6/h;(H2,1,2,3)(H2,4,5,6)/q+2;/p-2 |
calcium dihydrogen diphosphate - Physico-chemical Properties
| Molecular Formula | Ca2O7P2 |
| Molar Mass | 254.1 |
| Density | 3.09g/mLat 25°C(lit.) |
| Melting Point | 1230 °C |
| Water Solubility | Soluble in hydrochloric acid and nitric acid. Insoluble in water. |
| Solubility | H2O: insoluble(lit.) |
| Appearance | Powder |
| Specific Gravity | 3.09 |
| Color | White |
| Storage Condition | Room Temprature |
| MDL | MFCD00015983 |
calcium dihydrogen diphosphate - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - 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. S36 - Wear suitable protective clothing. |
| WGK Germany | 3 |
| TSCA | Yes |
| HS Code | 28353100 |
calcium dihydrogen diphosphate - Nature
Open Data Verified Data
white powder. The relative density is 3. 09 and the melting point is 1230 ℃. Insoluble in water, soluble in dilute hydrochloric acid and nitric acid, insoluble in alcohol. Three different crystal forms can be formed at different temperatures: Y-type at 530~750 ℃; p-type at 750~900 ℃; A- type at 1210 ℃. The pH of the 10% suspension was 5.5-7.0.
Last Update：2024-01-02 23:10:35
calcium dihydrogen diphosphate - Preparation Method
Open Data Verified Data
obtained by the reaction of anhydrous sodium pyroate with anhydrous calcium chloride. That is, the industrial grade anhydrous sodium pyrophosphate is dissolved in distilled water and recrystallized to meet the food grade requirements, and then dissolved and prepared for later use. In addition, after industrial anhydrous calcium chloride is dissolved, bleaching powder is added to decolor, iron removal is filtered, calcium chloride solution of a certain concentration is prepared and put into the reactor, and the purified anhydrous sodium pyrophosphate solution is slowly added under stirring, the reaction was carried out at 90 ° C. To form anhydrous calcium pyrophosphate. Calcium pyrophosphate was obtained by water washing, dehydration, drying and calcination. Calcium pyrophosphate can also be obtained by calcining calcium hydrogen phosphate under certain conditions.
Last Update：2022-01-01 09:07:44
calcium dihydrogen diphosphate - Use
Open Data Verified Data
The food industry is used as a nutritional supplement, yeast feed, buffer, and neutralizer. Can also be used for toothpaste abrasive, coating filler, electrical equipment fluorescent body.
Last Update：2022-01-01 09:07:44
calcium dihydrogen diphosphate - Safety
Open Data Verified Data
ADI 0-70mg/kg (total phosphate, calculated as phosphorus, FAO/WHO,2001). GRAS (FDA,& sect;182. 5223,& sect;182. 8223,& sect;182. 1223,2000). Should be stored in a cool, ventilated, dry, clean warehouse. They shall not be co-stored and co-transported with acid substances and toxic and hazardous substances. During transport, it should be protected from rain and sun exposure and moisture. Fire, can use water, sand, all kinds of fire extinguishing.
Last Update：2022-01-01 09:07:45
calcium dihydrogen diphosphate - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | health food, dairy products. |
| identification test | solubility insoluble in water; Soluble in dilute hydrochloric acid and dilute nitric acid. According to the OT-42 method. 1 ml of a solution of 1% sample of dilute hydrochloric acid test solution (TS-117) was added with several drops of silver nitrate test solution (TS-210). It should produce a white precipitate soluble in dilute nitric acid solution (TS-158). Take about TS-13 mg of sample, add 5ml of dilute hydrochloric acid test solution and 5ml of water, warm and dissolve, add 2.5ml of Ammonia Test Solution (TS-24) Dropwise, with shaking, and add 5ml of ammonium oxalate test solution (). A white precipitate should be generated. |
| content analysis | a sample of about TS-117 mg was accurately weighed and dissolved in 10ml of dilute hydrochloric acid test solution (). About 120ml of water was added and cooled for 30min. Dilute hydrochloric acid or water was added as needed during cooling to keep the volume and pH of the solution constant. After cooling, 25ml of 0.05mol/L EDTA disodium was added and diluted to ML with water. Neutralized with strong ammonia test solution (TS-14). 10ml of buffer (PH 10;TS-12) and several drops of Chrome Black test solution (TS-97) were added. Titrated with 0.05mol/L zinc sulfate. Each Ml of 0.05mol/L EDTA disodium equivalent to calcium pyrophosphate (Ca2P207)6.352mg. |
| toxicity | Adl 0-70mg/kg (total phosphate as phosphorus; FAO/WHO,2001). GRAS (FDA, § 182.5223, § 182.8223,§ 184.1223,2000). |
| usage limit | FAO/WHO(1984): processed cheese (9 g/kg, total phosphate, in terms of phosphorus). |
| category | toxic substances |
| flammability hazard characteristics | non-combustible |
| storage and transportation characteristics | low temperature ventilation and drying |
| extinguishing agent | Water |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 21:21:28
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