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EC / List no.: 692-045-3 / 231-448-7
CAS no.: 7558-79-4
Disodium phosphate (DSP), or disodium hydrogen phosphate, or sodium phosphate dibasic, is the inorganic compound with the formula Na2HPO4.
Disodium Hydrogen Phosphate is one of several sodium phosphates.
The salt is known in anhydrous form as well as forms with 2, 7, 8, and 12 hydrates.
All are water-soluble white powders; the anhydrous salt being hygroscopic.
The pH of disodium hydrogen phosphate water solution is between 8.0 and 11.0, meaning Disodium Hydrogen Phosphate is moderately basic:
HPO42− + H2O ⇌ H2PO4− + OH−
Production and reactions
Disodium Hydrogen Phosphate can be generated by neutralization of phosphoric acid with sodium hydroxide:
H3PO4 + 2 NaOH → HNa2PO4 + 2 H2O
Industrially Disodium Hydrogen Phosphate is prepared in a two-step process by treating dicalcium phosphate with sodium bisulfate, which precipitates calcium sulfate:
CaHPO4 + NaHSO4 → NaH2PO4 + CaSO4
In the second step, the resulting solution of monosodium phosphate is partially neutralized:
NaH2PO4 + NaOH → HNa2PO4 + H2O
Uses:
Disodium Hydrogen Phosphate is used in conjunction with trisodium phosphate in foods and water softening treatment.
In foods, it is used to adjust pH. Its presence prevents coagulation in the preparation of condensed milk.
Similarly, it is used as an anti-caking additive in powdered products.
Disodium Hydrogen Phosphate is used in desserts and puddings, e.g. Cream of Wheat to quicken cook time, and Jell-O Instant Pudding for thickening.
In water treatment, it retards calcium scale formation.
Disodium Hydrogen Phosphate is also found in some detergents and cleaning agents.
Heating solid disodium phosphate gives the useful compound tetrasodium pyrophosphate:
2 HNa2PO4 → Na4P2O7 + H2O
Laxative
Monobasic and dibasic sodium phosphate are used as a saline laxative to treat constipation or to clean the bowel before a colonoscopy.
Description
Disodium hydrogen phosphate is one of the inorganic compounds that is commonly used in food industry thanks to its ability of acting as a chemical buffer.
Disodium Hydrogen Phosphate helps stabilize the PH value, prevent coagulation, and enhance food characteristics like nutritional value and cooking performance.
Disodium Hydrogen Phosphate also finds application in medical use.
Disodium Hydrogen Phosphate can stimulate general liver activities, allowing it to operate in the first place.
Besides, disodium phosphate can be used in non-food industries.
Disodium Hydrogen Phosphate can be applied in water treatment for retarding the formation of calcium scale.
Disodium Hydrogen Phosphate is also found in some flame retardant, detergents and cleaning agents.
Uses:
Disodium hydrogen phosphate is a hydroscopic inorganic salt, it absorbs moisture that is then released to the skin.
In dry climatic conditions, however, it may draw moisture from the skin and release it to the air, aggravating dryness.
Without water, disodium phosphate may cause slight irritation.
Disodium Hydrogen Phosphate can also be used in a cosmetic as a fragrance, and to adjust pH or keep pH stable.
Finally, it can be selected to reduce corrosion of metallic materials used for product packaging.
Disodium hydrogen phosphate is the disodium salt of phosphoric acid which functions as a protein stabilizer, buffer, dispersant, and coagulation accelerator.
Disodium Hydrogen Phosphate is mildly alkaline with a 1% solution having a ph of 9.2.
Disodium Hydrogen Phosphate is moderately soluble in water with a solubility of 12 g in 100 ml at 25°c.
Disodium Hydrogen Phosphate is used in farina and macaroni to shorten the cooking time by making the particles swell faster and cook more thoroughly.
In evaporated milk it acts as a buffer and prevents gelation, also acting as a buffer in coffee whiteners.
Disodium Hydrogen Phosphate is an accelerator of the setting time in instant puddings.
In cream sauce and whipped products it functions as a dispersant by producing a swelling of protein.
Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical applications.
Buffer solutions are essential to maintain the suitable condition to keep the correct pH for enzymes in many organisms to work.
Disodium Hydrogen Phosphate is also used in fermentation processes and in setting the correct conditions for dyes used in coloring fabrics.
disodium hydrogen phosphate is a white, hygroscopic, odourless powder.
Hydrated forms available include the dihydrate: a white crystalline, odourless solid; the heptahydrate.
White, odourless, efflorescent crystals or granular powder; and the dodecahydrate: white, efflorescent, odourless powder or crystals
Sodium phosphate, dibasic appears as a colorless to white crystalline solid.
Soluble in water. The primary hazard is the threat to the environment.
Immediate steps should be taken to limit spread to the environment.
Used as a fertilizer, in pharmaceuticals, in food processing, and for many other uses.
Industry Uses
• Corrosion inhibitors and anti-scaling agents
• Fillers
• Intermediates
• Laboratory chemicals
• Oxidizing/reducing agents
• Paint additives and coating additives not described by other categories
• Plating agents and surface treating agents
• Processing aids, not otherwise listed
Consumer Uses
• Air care products
• Cleaning and furnishing care products
• Fabric, textile, and leather products not covered elsewhere
• Food packaging
• Laboratory Use
• Metal products not covered elsewhere
• Non-TSCA use
• Water treatment products
Household & Commercial/Institutional Products
• Auto Products
• Inside the Home
• Personal Care
• Pet Care
General Manufacturing Information
Industry Processing Sectors
• All other basic inorganic chemical manufacturing
• All other chemical product and preparation manufacturing
• Food, beverage, and tobacco product manufacturing
• Miscellaneous manufacturing
• Nonmetallic mineral product manufacturing (includes clay, glass, cement, concrete, lime, gypsum, and other nonmetallic mineral product manufacturing.
• Paint and coating manufacturing
• Pharmaceutical and medicine manufacturing
• Primary metal manufacturing
• Soap, cleaning compound, and toilet preparation manufacturing
• Textiles, apparel, and leather manufacturing
• Utilities
Disodium Hydrogen Phosphate is generally immediately available in most volumes.
High purity, submicron and nanopowder forms may be considered.
About Disodium Hydrogen Phosphate
Helpful information
Disodium Hydrogen Phosphate is registered under the REACH Regulation and is manufactured in and / or imported to the European Economic Area, at ≥ 10 000 to < 100 000 tonnes per annum.
Disodium Hydrogen Phosphate is used by consumers, in articles, by professional workers (widespread uses), in formulation or re-packing, at industrial sites and in manufacturing.
Consumer Uses
Disodium Hydrogen Phosphate is used in the following products: cosmetics and personal care products, fertilisers, plant protection products and pharmaceuticals.
Other release to the environment of Disodium Hydrogen Phosphate is likely to occur from: indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners) and outdoor use.
Article service life
Other release to the environment of Disodium Hydrogen Phosphate is likely to occur from: outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials) and indoor use in long-life materials with low release rate (e.g. flooring, furniture, toys, construction materials, curtains, foot-wear, leather products, paper and cardboard products, electronic equipment).
Disodium Hydrogen Phosphate can be found in products with material based on: fabrics, textiles and apparel (e.g. clothing, mattress, curtains or carpets, textile toys), leather (e.g. gloves, shoes, purses, furniture), paper (e.g. tissues, feminine hygiene products, nappies, books, magazines, wallpaper), stone, plaster, cement, glass or ceramic (e.g. dishes, pots/pans, food storage containers, construction and isolation material), metal (e.g. cutlery, pots, toys, jewellery) and plastic (e.g. food packaging and storage, toys, mobile phones).
Widespread uses by professional workers
Disodium Hydrogen Phosphate is used in the following products: metal surface treatment products, pH regulators and water treatment products, fertilisers, fillers, putties, plasters, modelling clay, water treatment chemicals and laboratory chemicals. Disodium Hydrogen Phosphate is used in the following areas: agriculture, forestry and fishing, municipal supply (e.g. electricity, steam, gas, water) and sewage treatment and formulation of mixtures and/or re-packaging. Disodium Hydrogen Phosphate is used for the manufacture of: metals, fabricated metal products, mineral products (e.g. plasters, cement), textile, leather or fur, pulp, paper and paper products and chemicals. Other release to the environment of Disodium Hydrogen Phosphate is likely to occur from: indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners) and outdoor use.
Formulation or re-packing
Disodium Hydrogen Phosphate is used in the following products: pH regulators and water treatment products, pharmaceuticals, cosmetics and personal care products, fillers, putties, plasters, modelling clay, fertilisers, metal surface treatment products, water treatment chemicals, leather treatment products and metal working fluids.
Release to the environment of Disodium Hydrogen Phosphate can occur from industrial use: formulation of mixtures, formulation in materials, manufacturing of the substance and in the production of articles.
Other release to the environment of Disodium Hydrogen Phosphate is likely to occur from: outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials) and indoor use in long-life materials with low release rate (e.g. flooring, furniture, toys, construction materials, curtains, foot-wear, leather products, paper and cardboard products, electronic equipment).
Uses at industrial sites
Disodium Hydrogen Phosphate is used in the following products: pH regulators and water treatment products, metal surface treatment products, water treatment chemicals, fertilisers, leather treatment products and metal working fluids.
Disodium Hydrogen Phosphate is used in the following areas: municipal supply (e.g. electricity, steam, gas, water) and sewage treatment and formulation of mixtures and/or re-packaging.
Disodium Hydrogen Phosphate is used for the manufacture of: chemicals, metals, fabricated metal products, textile, leather or fur, pulp, paper and paper products, plastic products and mineral products (e.g. plasters, cement).
Release to the environment of Disodium Hydrogen Phosphate can occur from industrial use: in processing aids at industrial sites, in the production of articles, as an intermediate step in further manufacturing of another substance (use of intermediates), as processing aid, of substances in closed systems with minimal release and as processing aid.
Manufacture
Release to the environment of Disodium Hydrogen Phosphate can occur from industrial use: manufacturing of the substance and formulation of mixtures.
IUPAC NAMES:
Di Sodium Hydrogen Phosphate
di-Sodio Hidrógeno Fosfato 12-hidrato
di-Sodium hydrogen phosphate 12-hydrate
disodium hydrogen orthophosphate
Disodium hydrogen phosphate
disodium hydrogen phosphate
DISODIUM HYDROGENORTHOPHOSPHATE
Disodium hydrogenorthophosphate
disodium hydrogenorthophosphate
disodium hydrogenphosphate
Disodium orthophosphate dihydrate
DISODIUM PHOSPHATE
disodium;hydrogen phosphate
Disodiumhydrogenphosphate
Phosphoric acid, disodium salt
Sodium hydrogen phosphate
Sodium Phosphate Dibasi
sodium phosphoric acid
SYNONYMS:
7558-79-4
Disodium hydrogen phosphate
Disodium hydrogenorthophosphate
Sodium phosphate dibasic
DISODIUM PHOSPHATE
Dibasic sodium phosphate
Acetest
Soda phosphate
Sodium phosphate, dibasic
Phosphoric acid, disodium salt
Disodium orthophosphate
Disodium acid phosphate
Sodium hydrogenphosphate
disodium hydrogenphosphate
Sodium hydrogen phosphate
Exsiccated sodium phosphate
disodium;hydrogen phosphate
Disodium acid orthophosphate
sec-Sodium phosphateSodium monohydrogen phosphate
Disodium monohydrogen phosphate
FEMA No. 2398
Hydrogen disodium phosphate
UNII-22ADO53M6F
Disodium hydrogen phosphate, anhydrous
Sodium phosphate, dibasic (anhydrous)
SODIUM PHOSPHATE, DIBASIC, ANHYDROUS
Na2HPO4
Phosphoric acid, sodium salt (1:2)
SODIUM PHOSPHATE, DIBASIC ANHYDROUS
22ADO53M6F
Disodium hydrogen orthophosphate
DSP
CHEBI:34683
Sodium Phosphate dibasic anhydrou
MFCD00003496
Phosphate of soda
di-Sodium hydrogen phosphate anhydrous, USP grade
Monohydrogen Sodium Phosphate
Caswell No. 778
Disodium hydrophosphate
FEMA Number 2398
Fleet enema
Natriumphosphat [German]
secondary Sodium phosphate
Sodium phosphate (NaHPO4)
Sodium phosphate, exsiccated
Disodium phosphate, anhydrous
CCRIS 5931
HSDB 376
Sodium orthophosphate, secondary
Sodium acid phosphate, anhydrous
EINECS 231-448-7
Potassium Phosphate Monobasic/Sodium Phosphate Dibasic
EPA Pesticide Chemical Code 076403
Sodium monohydrogen phosphate (2:1:1)
Disodiumhydrogenphosphate
HNa2O4P
sodium hydrogen-phosphate
disodium hydrogen-phosphate
Buffer Salt, pH 6.87
Buffer Salt, pH 7.42
EC 231-448-7
Sorensen's sodium phosphate
di-sodium hydrogen phosphate
phosphoric acid disodium salt
sodium hydrogen orthophosphate
Disodium hydrogen monophosphate
INS NO.339(II)
DTXSID1026039
INS-339(II)Dibasic sodium phosphate anhydrous
Sodium phosphate,dibasic,anhydrous
dibasic sodium phosphate, anhydrous
BCP13559
Sodium hydrogen phosphate, anhydrous
Sodium phosphate dibasic, ACS grade
Disodium Hydrogen Phosphate Submicron
Disodium Phosphate (Fragrance Grade
E-339(II)
AKOS015902440
AKOS015950661
Disodium Phosphate (Industrial Grade)
CCG-266159
DB14502
di-Sodium hydrogen phosphate, anhydrous
phosphoric acid, disodium salt, anhydrous
Sodium phosphate dibasic, biochemical grade
B7293
FT-0625321
Sodium phosphate dibasic, Trace metals grade
Y1397
A937532
Q418448
PHOSPHORIC-32P ACID,DISODIUM SALT (8CI,9CI)
UNII-GR686LBA74 component BNIILDVGGAEEIG-UHFFFAOYSA-L
UNII-SE337SVY37 component BNIILDVGGAEEIG-UHFFFAOYSA-L
4-amino-n-(1,2-oxazol-5-yl)benzenesulfonamide
4-Amino-N-5-isoxazolylbenzenesulfonamide
MONOHYDROGEN SODIUM PHOSPHATE
N-(Isoxazol-5-yl)sulphanilamide
SODIUM PHOSPHATE, DIBASIC
SODIUM MONOHYDROGEN PHOSPHATE
SODIUM HYDROGENHOSHATE
SEC-SODIUM PHOSPHATE
SECONDARY SODIUM PHOSPHATE
FEMA 2398
DINATRII PHOSPHAS ANHYDRICUS
DIBASIC SODIUM PHOSPHATE
DSPA
DSP
DISODIUM PHOSHATE
DISODIUM PHOSPHATE
DISODIUM HYDROGEN PHOSPHATE
DI-SODIUM HYDROGEN PHOSPHATE CONCENTRATE II
DI-SODIUM HYDROGEN PHOSPHATE CONCENTRATE I
DI-SODIUM HYDROGEN ORTHOPHOSPHATE DIBASIC
BUFFER SOLUTION, PH 7.0
BUFFER CONCENTRATE II FROM DI-SODIUM HYDROGEN PHOSPHATE
BUFFER CONCENTRATE I FROM DI-SODIUM HYDROGEN PHOSPHATE
BUFFER SOLUTION
BUFFER SOLUTION, PH 2.5
Anhydrous disodium hydrogen phosphate
Buffer solution pH 12.0 (20 .C)
Phosphoric acid/di-Sodium hydrogen phosphate solution, Buffer solution from phosphoric acid/di-Sodium hydrogen phosphate
Buffer solution HPCE pH 7.0
Buffer solution HPCE pH 6.5
Buffer solution HPCE pH 8.5
Buffer solution HPCE pH 9.5
Buffer solution HPCE pH 7.5
4-Amino-N-(isoxazol-5-yl)benzenesulfonamide
Einecs 231-839-2
N-(Isoxazol-5-yl)sul
Sodium phsophate dibasic anhydrus
Benzenesulfonamide, 4-amino-N-5-isoxazolyl-
Phosphoricacid,disodiumsalt,heptahydrate
Sodiummonohydrogenphosphateheptahydrate(2:1:1:7)
MONOHYDROGEN SODIUM PHOSPHATE
SEC-SODIUM PHOSPHATE HEPTAHYDRATE
SECONDARY SODIUM PHOSPHATE
SECONDARY SODIUM PHOSPHATE HEPTAHYDRATE
SODIUM MONOHYDROGEN PHOSPHATE HEPTAHYDRATE
SODIUM PHOSPHATE, DIBASIC, HEPTAHYDRATE
SODIUM PHOSPHATE HEPTAHYDRATE
SODIUM PHOSPHATE HEPTAHYDRATE, DIBASIC
SODIUM PHOSPHATE DIBASIC
SODIUM PHOSPHATE, DIBASIC, 7-HYDRATE
SODIUM PHOSPHATE 7H2O, DIBASIC
SODIUM HYDROGEN PHOSPHATE HEPTAHYDRATE
DIBASIC SODIUM PHOSPHATE HEPTAHYDRATE
DI-SODIUM HYDROGEN PHOSPHATE-7-HYDRATE
DISODIUM HYDROGEN PHOSPHATE HEPTAHYDRATE
DISODIUM HYDROGEN PHOSPHATE
DISODIUM PHOSPHATE
DISODIUM PHOSPHATE HEPTAHYDRATE
DSP
DSP HEPTAHYDRATE
Sodiumphosphate,diabasic,heptahydrate
SODIUM HYDROGENPHOSPHATE HEPTAHYDRATE, R EAGENTPLUS, 99.99+%
DI-SODIUM HYDROGEN PHOSPHATE HEPTAHYDRAT E, ACS
SODIUM PHOSPHATE, DIBASIC HEPTAHYDRATE, 98+%, A.C.S. REAGENT
DI-SODIUM HYDROGEN PHOSPHATE-7-HYDRATE R . G., REAG. ACS
Sodiumhydrogenphosphateheptahydrate,ACS,98.0-102.0%
SODIUM PHOSPHATE DIBASIC 7 H2O
Sodium phosphate, dibasic heptahydrate, for analysis ACS, 98+%
sodium hydrogen phosphate heptahydrate, acs
DIBASICSODIUMPHOSPHATE,HEPTAHYDRATE,CRYSTAL,USP
SODIUMPHOSPHATE,DIBASIC,HEPTAHYDRATE,CRYSTAL,REAGENT,ACS
SODIUMPHOSPHATE,DIBASIC,HEPTAHYDRATE,GRANULAR,REAGENT,ACS
SODIUMPHOSPHATEDIBASIC,HEPTAHYDRATE,GRANULAR,BIOTECHGRADE
SODIUMPHOSPHATEDIBASIC,HEPTAHYDRATE,TECHNICAL
SODIUM PHOSPHATE DIBASIC HEPTAHYDRATE GRANULAR
Sodium Phosphate, dibasic, dried powder
Disodium hydrogen phosphate heptahydrate, Disodium phosphate
Dibasic Sodium Phosphate, Heptahydrate, Crystal
Sodium Phosphate, Dibasic, Heptahydrate, Crystal, Reagent
Sodium Phosphate, Dibasic, Heptahydrate, Granular, Reagent
Sodium phosphate, dibasic heptahydrate, for analysis, 99+%
SODIUM PHOSPHATE, DIBASIC HEPTAHYDRATE, REAGENT (ACS)
SODIUM PHOSPHATE, DIBASIC, HEPTAHYDRATE, REAGENT (ACS)SODIUM PHOSPHATE, DIBASIC, HEPTAHYDRATE, REAGENT (ACS)SODIUM PHOSPHATE, DIBASIC, HEPTAHYDRATE, REAGENT (ACS)SODIUM PHOSPHATE, DIBASIC, HEPTAHYDRATE, REAGENT (ACS)
Phosphoricacid, disodium salt, heptahydrate(8CI,9CI)
SODIUM PHOSPHATE 2BAS 7HYD XTL
OmniPur Sodium Phosphate, Dibasic, Heptahydrate - CAS 7782-85-6 - Calbiochem
Sodium Phosphate, Tribasic, Dodecahydrate, Crystal, Reagent
Sodium phosphate, dibasic heptahydrate, 99+%, for analysis
Sodium phosphate, dibasic heptahydrate, for analysis
Sodium phosphate, dibasic heptahydrate, for analysis ACS
Sodium phosphate, dibasic heptahydrate,98+%,for analysis ACS
SODIUM PHOSPHATE, DI
SSodiuM phosphate dibasic heptahydrate
SodiuM phosphate, dibasic heptahydrate, for analysis ACS, 98+% 500GR
SodiuM phosphate, dibasic heptahydrate, for analysis, 99+% 500GR
DI-SODIUM HYDROGEN PHOSPH. HEPTAH. P.A.
