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CAS No 7758-29-4 , Sodium tripolyphosphate Search by region : India

  • Name: Sodium tripolyphosphate
  • Synonyms: STPP; Pentasodium Tripolyphosphate; Sodium Phosphate Tripoly; Pent-sodium Phosphate;pentasodium triphosphate; Triphosphoric acid, pentasodium salt; Sodium triphosphate;Sodium tripolyphosphate;Pentasodium triphosphate;
  • CAS Registry Number:
  • Melting Point: 622 °C
  • Density: >1.5 g/cm3 (20 C)
  • Water Solubility: 20 G/100 ML (20 ºC)
  • Safety Statements: R36/37/38
  • Hazard Symbols: Xi: Irritant;
  • EINECS: 231-838-7
  • Molecular Weight: 367.86
  • InChI: InChI=1/5Na.H5O10P3/c;;;;;1-11(2,3)9-13(7,8)10-12(4,5)6/h;;;;;(H,7,8)(H2,1,2,3)(H2,4,5,6)/q5*+1;/p-5
  • Risk Statements: S24/25
  • Molecular Formula: Na5P3O10
  • Molecular Structure:CAS No:7758-29-4 Sodium tripolyphosphate

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References of Sodium tripolyphosphate
Title: Sodium Tripolyphosphate
CAS Registry Number: 7758-29-4
CAS Name: Triphosphoric acid pentasodium salt
Synonyms: sodium triphosphate; tripolyphosphate; STPP; poly; pentasodium triphosphate
Molecular Formula: Na5O10P3
Molecular Weight: 367.86
Percent Composition: Na 31.25%, O 43.49%, P 25.26%
Line Formula: Na5P3O10
Literature References: Prepd by molecular dehydration of mono- and disodium phosphates: Audrieth, Bell, Inorg. Synth. 3, 85 (1950). Toxicity study: H. F. Smyth et al., Am. Ind. Hyg. Assoc. J. 30, 470 (1969).
Properties: Slightly hygroscopic granules. Soly in water (g/100 ml) at 25°: 20; at 100°: 86.5. pH of 1% soln at 25° = 9.7-9.8. Its properties are between those of tetrasodium pyrophosphate and sodium metaphosphate. Stability: With prolonged heating of STPP solns, it tends to revert to the orthophosphate. More stable than the higher (i.e., meta-) phosphates, but less stable than tetrasodium pyrophosphate. LD50 orally in rats: 6.50 g/kg (Smyth).
Toxicity data: LD50 orally in rats: 6.50 g/kg (Smyth)
CAUTION: Moderately irritating to skin, mucous membranes. Ingestion can cause violent purging.
Use: In water softening (calcium and magnesium hardness is sequestered from soln without precipitation); peptizing agent, emulsifier and dispersing agent, ingredient of cleansers in drilling fluids to control mud viscosity in oil fields; as preservative, sequestrant and texturizer in foods.