disodium dihydrogen diphosphate
Sodium polyphosphate
CAS: 68915-31-1
Molecular Formula: Na3O10P3X2
disodium dihydrogen diphosphate - Names and Identifiers
| Name | Sodium polyphosphate |
| Synonyms | Sodiumpolyphosphate Sodium polyphosphate Glassy sodium phosphate Sodium hexametaphosphate Sodium Hexa meta phophate SodiumHexametaphosphateGlassy disodium dihydrogen diphosphate Sodium polyphosphate, amorphous SODIUM POLYPHOSPHATE EXTRA PURE Polyphosphorsuren, Natriumsalze Polyphosphoric acids, sodium salts disodium [hydroxy(oxidanidyl)phosphoryl] hydrogen phosphate |
| CAS | 68915-31-1 |
| EINECS | 272-808-3 |
| InChI | InChI=1/2Na.H4O7P2/c;;1-8(2,3)7-9(4,5)6/h;;(H2,1,2,3)(H2,4,5,6)/q2*+1;/p-2 |
disodium dihydrogen diphosphate - Physico-chemical Properties
| Molecular Formula | Na3O10P3X2 |
| Molar Mass | 321.88 |
| Appearance | crystalline |
| Physical and Chemical Properties | Colorless transparent glass-like block or sheet. Soluble in water, insoluble in organic solvents. Strong hygroscopicity, in warm water, acid or alkali solution easily hydrolyzed to orthophosphate. Melting point 616 C (decomposition), relative density (d2020)2.484. |
| Use | As a quality improver in meat products and dairy products, it can be used as a friction agent for fluoride toothpaste |
disodium dihydrogen diphosphate - Risk and Safety
| WGK Germany | 1 |
| RTECS | TR4950250 |
| FLUKA BRAND F CODES | 3 |
disodium dihydrogen diphosphate - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | sodium hexametaphosphate is used as a water softener in dyeing or post-treatment, and can be used from the generated insoluble calcium soap, magnesium soap or calcium dye, in the precipitation of magnesium dye, calcium ions and magnesium ions are taken, and the precipitate is redissolved. In other words, the introduction of sodium hexametaphosphate into the solution can regenerate the sodium soap, and even when the calcium soap or magnesium soap has been formed, the clots of the calcium soap or magnesium soap will disappear. Similarly, sodium hexametaphosphate can regenerate the dye. Quality improver; pH regulator; Metal ion chelating agent; Binder and expanding agent. In the beans, canned fruits and vegetables can be stable natural pigment, protect the color of food; In the canned meat can make fat emulsification, maintain uniform texture; Used in meat food can improve the water holding capacity, prevent the deterioration of fat in meat. Added to beer, can clarify the liquor, to prevent turbidity. Water quality without precipitation of softening agent. as a quality improver in meat products and dairy products, it can be used as a friction agent for fluoride toothpaste used as a water softener for boiler water and industrial water, industrial circulating cooling water treatment agent |
| Food application | Sodium polyphosphate tissue improver; Emulsifier; Stabilizer; Chelating agent. Use alone is less common and is typically used in combination with pyrophosphate and metaphosphate. The mixture is mainly used for ham, sausage, surimi and the like as a tissue improver for water retention, tenderness and softening of old and disabled animal meat. To prevent the crab can produce crystallization, pectin solubilizing agent. The general formula of sodium salt of Polyphosphoric acid is Nan + 2PnOn +3, which is a linear heterogeneous mixture, mainly composed of sodium tripolyphosphate, and can also contain sodium pyrophosphate, six sodium phosphate (Na2H6P6O19), sodium tetraphosphate, sodium pentaphosphate and sodium hexaphosphate, etc. The larger the value of n, the more transparent the glass. The size of the hygroscopicity and the pH value of the aqueous solution (also depending on the degree of polymerization, such as the pH value of 1% sodium tripolyphosphate aqueous solution) are 9.5 to 9.8, sodium tetraphosphate is 8.3 to 8.7, and sodium pentaphosphate is 8.6, sodium hexapolyphosphate was 8.0. It has a strong dispersing effect on starch, is soluble in water, and has the property of chelating metal ions in aqueous solution, so that the substance that is difficult to dissolve in water is dispersed and dissolved. |
| Application | Sodium polyphosphate is mainly used in the processing of various meat products and poultry foods. During processing and freezing, the adhesion between meat quality and moisture is significantly enhanced. Prevent the loss of water during storage, so that the combination of fat and water is stronger, so that the edible and tender food is well maintained during storage, make the taste and color of food more durable and stable. Can prevent the growth of bacteria. Dosage: 0.3-0.5%. |
| production method | from sodium dihydrogen phosphate by high temperature (600~650 °c) polymerization, quenching. |
| category | corrosive article |
| toxicity grade | poisoning |
| Acute toxicity | oral-rat LD50: 3053 mg/kg; Oral-mouse LD50: 7572 mg/kg |
| flammability hazard characteristics | combustible pore forming agent in case of H; thermal decomposition of toxic phosphorus oxide smoke |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored separately from H pore forming agent and alkali. |
| extinguishing agent | Sand, carbon dioxide |
Last Update：2024-04-09 02:00:10
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View History
disodium dihydrogen diphosphate
26475-66-1
11-羟基柳杉酚
4-AMINO-O-CRESOL
OXYBUTYNIN HYDROCHLORIDE MM(CRM STANDARD)
26475-66-1
11-羟基柳杉酚
4-AMINO-O-CRESOL
OXYBUTYNIN HYDROCHLORIDE MM(CRM STANDARD)