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Disodium pyrophosphate(CAS No. 7758-16-9)

Disodium pyrophosphate H2Na2O7P2 (cas 7758-16-9) Molecular Structure

7758-16-9 Structure

Identification and Related Records

【Name】
Disodium pyrophosphate
【CAS Registry number】
7758-16-9
【Synonyms】
Disodium dihydrogen pyrophosphate
Disodiumdiphosphate
Disodium pyrophosphate (Na2H2P2O7)
SAPP
SAPP 40
SAPP-RD 1
Sodium hydrogen phosphate (Na2H2P2O7)
Sodium acid pyrophosphate(SAPP)
Sodium Acid Pyrophosphate (SAPP)
Diphosphoricacid, disodium salt (9CI)
Pyrophosphoric acid, disodium salt (8CI)
Sodiumpyrophosphate (Na2H2P2O7) (6CI)
Dihydrogen disodium pyrophosphate
Disodium dihydrogen diphosphate
Disodium dihydrogendiphosphate (Na2H2P2O7)
【EINECS(EC#)】
231-835-0
【Molecular Formula】
H2Na2O7P2 (Products with the same molecular formula)
【Molecular Weight】
265.902402
【Inchi】
InChI=1S/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
【InChIKey】
FQENQNTWSFEDLI-UHFFFAOYSA-J
【Canonical SMILES】
[O-]P(=O)([O-])OP(=O)([O-])[O-].[Na+].[Na+].[Na+].[Na+]
【MOL File】
7758-16-9.mol

Chemical and Physical Properties

【Appearance】
white powder
【Density】
2.311 g/cm3 (25 C)
【Melting Point】
988 DEG C
【Water】
H2 O: 0.1 M at 20 °C, clear, colorless
【Solubilities】
H2 O: 0.1 M at 20 °C, clear, colorless
【Color/Form】
CRYSTALS
COLORLESS, TRANSPARENT CRYSTALS OR WHITE POWDER
White powder or granules.
【Stability】
Stable.
【Storage temp】
?70°C
【Spectral properties】
INDEX OF REFRACTION: 1.425
【Computed Properties】
Molecular Weight:265.902402 [g/mol]
Molecular Formula:Na4O7P2
H-Bond Donor:0
H-Bond Acceptor:7
Rotatable Bond Count:0
Exact Mass:265.871004
MonoIsotopic Mass:265.871004
Topological Polar Surface Area:136
Heavy Atom Count:13
Formal Charge:0
Complexity:124
Isotope Atom Count:0
Defined Atom Stereocenter Count:0
Undefined Atom Stereocenter Count:0
Defined Bond Stereocenter Count:0
Undefined Bond Stereocenter Count:0
Covalently-Bonded Unit Count:5

Safety and Handling

【Safety Statements 】
24/25
【Safety】

Safety Statements?of Disodium pyrophosphate (CAS NO.7758-16-9): 24/25?
S24/25: Avoid contact with skin and eyes.
WGK Germany: 2
RTECS: UX6475000
Poison by intravenous route. Moderately toxic by ingestion and subcutaneous routes. An irritant to skin, eyes, and mucous membranes. When heated to decomposition it emits toxic fumes of POx and Na2O.

【Formulations/Preparations】
TSPP IS USED IN VANILLA INSTANT PUDDING-MIX AT LEVELS OF 2.8 G/113.4 G OF MIX 2.8 G/127.6 G OF CHOCOLATE MIX. PATENT 2,607,692. /FROM TABLE/
CURAFOS USED IN.../MICROBIOLOGICAL INHIBITORY/ EXPERIMENTS CONTAINED 15% TSPP, 70% STPP, AND 15% SHMP; FIBRISOL CONTAINED 25% SAPP, 15% TSPP, 10% SHMP, AND 50% NACL. /PHOSPHATES/
TSPP IS USED IN VANILLA INSTANT PUDDING-MIX AT LEVELS OF 1.5 G/92.3 G OF MIX & 1.5 G/113.8 G OF CHOCOLATE MIX. PATENT 2,801,924. TSPP IS USED IN UNFLAVORED INSTANT PUDDING-MIX AT 2.2 G/100.0 G OF MIX. PATENT 3,231,391. /FROM TABLE/
GRADES: PURE CRYSTALS; DRIED; FUSED; CP; FCC.
MANUFACTURERS: ...COMMERCIAL MIXTURES OF PHOSPHATES NORMALLY USED IN CURING MEAT PRODUCTS /ARE/ (CURAFOS AND FIBRISOL, MANUFACTURED BY JA BENCKISER)...
【Exposure Standards and Regulations】
Tetrasodium pyrophosphate used as a sequestrant in food for human consumption is generally recognized as safe when used in accordance with good manufacturing practice.
Tetrasodium pyrophosphate used as a sequestrant in animal drugs, feeds, and related products is generally recognized as safe when used in accordance with good manufacturing or feeding practice.
【Reactivities and Incompatibilities】
Strong acids.
【Other Preventative Measures】
The worker should immediately wash the skin when it becomes contaminated.
Work clothing that becomes wet or significantly contaminated should be removed and replaced.
Workers whose clothing may have become contaminated should change into uncontaminated clothing before leaving the work premises.
【Protective Equipment and Clothing】
Wear appropriate personal protective clothing to prevent skin contact.
Wear appropriate eye protection to prevent eye contact.
Eyewash fountains should be provided in areas where there is any possbility that workers could be exposed to solutions containing the substance; this is irrespective of the recommendation involving the wearing of eye protection. /Solution/
【Specification】

Other names of Disodium pyrophosphate (CAS NO.7758-16-9):
Diphosphoric acid, disodium salt;Disodium diphosphate;Disodium dihydrogen ;pyrophosphate;Sodium acid pyrophosphate?
?

【Report】

Reported in EPA TSCA Inventory.

【Disposal Methods】
SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

Use and Manufacturing

【Use and Manufacturing】
Methods of Manufacturing

REACTION OF FURNACE-GRADE PHOSPHORIC ACID WITH SODIUM CARBONATE TO FORM DISODIUM PHOSPHATE WHICH IS IN TURN HEATED TO 450 DEGREES CENTIGRADE, FORMING TETRASODIUM PYROPHOSPHATE
PRODUCED BY MOLECULAR DEHYDRATION OF DIBASIC SODIUM PHOSPHATE @ 500 DEG C: BELL, INORG SYN 3, 98 (1950).
By fusing sodium phosphate, dibasic
U.S. Exports

(1972) ND
(1975) ND
U.S. Imports

(1972) ND
(1975) ND
U.S. Production

(1972) 4.21X10+10 GRAMS
(1975) 3.1X10+10 GRAMS
Consumption Patterns

65-69% USED IN INDUSTRIAL & INSTITUTIONAL DETERGENT BUILDERS & WATER TREATMENT APPLICATIONS; 13-15% USED IN CLAY PROCESSING; 3-5% IN FOOD & ALLIED PRODUCTS (OTHER THAN DAIRY); 1% IN DAIRY & ALLIED PRODUCTS; 13% IN MISC APPLICATIONS INCLUDING HOME LAUNDRY DETERGENTS, TEXTILES, ELASTOMERS, IN PAPER PROCESSING(1973)
【Usage】

Electroplating, metal cleaning and phosphatising, drilling muds, baking powders and leavening agent, buffer, sequestrant, peptising agent in cheese and meat products, frozen desserts.

Biomedical Effects and Toxicity

【Pharmacological Action】
- Substances used to allow enhanced visualization of tissues.
- Drugs used to potentiate the effectiveness of radiation therapy in destroying unwanted cells.
- Agents destructive to the protozoal organisms belonging to the suborder TRYPANOSOMATINA.

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