焦磷酸钠
Tetrasodium pyrophosphate decahydrate
CAS: 13472-36-1
Molecular Formula: Na4P2O7·10H2O
焦磷酸钠 - Names and Identifiers
| Name | Tetrasodium pyrophosphate decahydrate |
| Synonyms | Trisodium phosphate 12aq sodium pyrophosphate decahydrate tetrasodium diphosphate decahydrate Tetrasodium pyrophosphate decahydrate sodium phosphonato phosphate decahydrate Diphosphoric acid, tetrasodium salt, decahydrate |
| CAS | 13472-36-1 |
| EINECS | 231-767-1 |
| InChI | InChI=1/Na.H4O7P2.10H2O/c;1-8(2,3)7-9(4,5)6;;;;;;;;;;/h;(H2,1,2,3)(H2,4,5,6);10*1H2/q+1;;;;;;;;;;;/p-4 |
焦磷酸钠 - Physico-chemical Properties
| Molecular Formula | Na4P2O7·10H2O |
| Molar Mass | 446.06 |
| Melting Point | 80℃ |
| Boling Point | 80℃ |
| Water Solubility | 62 g/L (20℃) |
| Appearance | Colorless crystal |
| Storage Condition | Room Temprature |
| MDL | MFCD00149200 |
| Physical and Chemical Properties | density 1.82 |
| Use | Used as water softener, emulsifier, metal detergent, boiler water treatment agent, drilling mud viscosity regulator |
焦磷酸钠 - 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. S36 - Wear suitable protective clothing. |
焦磷酸钠 - Upstream Downstream Industry
| Raw Materials | Sodium carbonate Phosphoric acid |
| Downstream Products | FERRIC PYROPHOSPHATE |
焦磷酸钠 - Nature
Open Data Verified Data
anhydrous sodium pyrophosphate is a five-color transparent crystal or white powder. The relative density is 2. 45 and the melting point is 988 ℃. Soluble in water, aqueous solution is alkaline. Sodium pyrophosphate decahydrate is a colorless monoclinic crystal or crystalline powder. The relative density is 1. 824 and the melting point is 79.5 ℃. Soluble in water, alkaline aqueous solution, insoluble in ethanol. Weathering in the air. Water of crystallization was lost by heating to 100 °c.
Last Update：2025-06-10 22:55:16
焦磷酸钠 - Preparation Method
Open Data Verified Data
soda ash was added to a neutralizer, heated and dissolved with stirring, and then phosphoric acid was added for neutralization reaction to produce disodium hydrogen phosphate. The pH at the end of the reaction was controlled to be 8.2 to 8.6. After decolorization and filtration, the disodium hydrogen phosphate solution is concentrated and dried, and then sent to the blade mechanism to form a sheet, and then sent to the polymerization furnace to heat and polymerize to generate sodium pyrophosphate. After cooling, crushing, screening, prepared anhydrous sodium pyrophosphate products. Alternatively, disodium hydrogen phosphate is heated at 200-300 °c to obtain anhydrous sodium pyrophosphate. Anhydrous sodium pyrophosphate was dissolved in water and concentrated to give crystalline sodium pyrophosphate.
Last Update：2025-06-10 22:55:16
焦磷酸钠 - Application
Open Data Verified Data
sodium pyrocarbonate is used as water softener and boiler scale inhibitor in the field of water treatment.
Last Update：2025-08-19 16:24:40
焦磷酸钠 - Safety
Open Data Verified Data
Sodium Pyrophosphate has mild irritation to skin and mucous membranes. Inhalation or cannibalism can cause severe Diarrhea. Workers who produce and use sodium pyrophosphate should wear protective gear. The production workshop should be installed with air supply and exhaust. Should be stored in a dry, ventilated warehouse. Strict protection against sun and rain. It is not allowed to be stored and mixed with toxic and hazardous substances.
Last Update：2025-06-10 22:55:16
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Raw Materials for 焦磷酸钠
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