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CAS No 7722-88-5 , Tetrasodium pyrophosphate Search by region : Canada

  • Name: Tetrasodium pyrophosphate
  • Synonyms: Sodium pyrophosphate; Pyrophosphoric acid tetrasodium salt;Diphosphoric acid tetrasodium salt; Sodium diphosphate;Tetrasodium pyrophosphate; TSPP; Tetrasodium pyrophosphate; Tetrasodium Diphosohate; Tetra Sodium Pyrophosphate;
  • CAS Registry Number:
  • Melting Point: 80 °C
  • Boiling Point: 93.8 °C
  • Density: 2.53
  • Safety Statements: R36/37/38
  • Hazard Symbols: Xi: Irritant;
  • EINECS: 231-767-1
  • Molecular Weight: 265.90
  • InChI: InChI=1/4Na.H4O7P2/c;;;;1-8(2,3)7-9(4,5)6/h;;;;(H2,1,2,3)(H2,4,5,6)/q4*+1;/p-4
  • Risk Statements: S26;S36
  • Molecular Formula: Na4P2O7
  • Molecular Structure:CAS No:7722-88-5 Tetrasodium pyrophosphate

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7722-88-5 TETRASODIUM PYROPHOSPHATE

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References of Tetrasodium pyrophosphate
Title: Tetrasodium Pyrophosphate
CAS Registry Number: 7722-88-5
Synonyms: TSPP; pyro; sodium pyrophosphate
Molecular Formula: Na4O7P2
Molecular Weight: 265.90
Percent Composition: Na 34.58%, O 42.12%, P 23.30%
Line Formula: Na4P2O7
Literature References: Available alkalinity as Na2O 4.4%, total alkalinity 22.7%. Produced by molecular dehydration of dibasic sodium phosphate at 500°: Bell, Inorg. Synth. 3, 98 (1950).
Properties: Crystals, d 2.534. mp 988°. Soly in water (g/100 ml) at 0°: 2.61; at 25°: 6.70; at 100°: 42.2. pH of a 1% soln = 10.2. Hydrolyzes to orthophosphate in aq soln, but the rate of hydrolysis is much slower than for the more acid pyrophosphate. No noticeable hydrolysis within 60 hrs at 70°: Bell, Ind. Eng. Chem. 39, 136 (1947).
Melting point: mp 988°
Density: d 2.534
 
Derivative Type: Decahydrate
Properties: Crystals, d 1.82. mp 79.5°. Slight efflorescence in dry air. Soly in water (g/100 ml) at 0°: 3.16; at 20°: 6.23; at 25°: 8.14; at 60°: 21.83; at 80°: 30.04. pH of 1% soln at 25° = 10.2. Insol in alc.
Melting point: mp 79.5°
Density: d 1.82
 
CAUTION: Potential symptoms of overexposure are irritation of eyes, skin, nose, throat; dermatitis. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 304.
Use: In cleansing compds, oil-well drilling, water treatment, cheese emulsification, as general sequestering agent, to remove rust stains, as ingredient of one-fluid ink eradicators, in electrodeposition of metals.