Food & beverage
Emulsifying salt in processed cheese; buffer and acidity regulator.
Ingredients / Phosphates / Disodium Phosphate (DSP)
Phosphates
Disodium Phosphate (DSP) (E 339(ii))
Disodium phosphate (DSP) for U.S. manufacturers, from vetted producers. FCC / USP grade on request. Download the sample spec sheet, then send us your grade and quantity.
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Key facts
| CAS No. | 7558-79-4 |
|---|---|
| E-number (EU) | E 339(ii) |
| Synonyms | Disodium monophosphate, Secondary sodium phosphate, Disodium orthophosphate; |
| Chemical formula | Anhydrous:Na2HPO4 Hydrate: Na2HPO4 · nH2O (n = 2, 7 or 12) |
| Molecular weight | 141,98 (anhydrous) |
| Description | Anhydrous 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 |
| Solubility | Freely soluble in water. Insoluble in ethanol |
| Grades | EU Reg. 231/2012 (E 339(ii)) sample spec · FCC / USP available on request for U.S. food/pharma use |
| Origin | Confirmed in every offer; stated per lot on the COA |
| Storage, shelf life, packaging | Per the producer's specification, on request |
What disodium phosphate (DSP) is
Chemical name: Disodium hydrogen monophosphate. Formula Anhydrous:Na2HPO4 Hydrate: Na2HPO4 · nH2O (n = 2, 7 or 12), molecular weight 141,98 (anhydrous). Anhydrous 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. Freely soluble in water. Insoluble in ethanol. (Source: EU Regulation 231/2012, E 339(ii).)
Applications by industry
Sample specification
Values from EU Regulation 231/2012 (E 339(ii)), consolidated text of 18.08.2026. Actual values depend on the producer; the producer's specification and the COA for your lot are available on request.
| Assay | After drying at 40 °C for three hours and subsequently at 105 °C for five hours, contains not less than 98 % of Na2HPO4 P2O5 content between 49 % and 51 % on the anhydrous basis |
|---|---|
| Loss on drying | The anhydrous salt loses not more than 5,0 %, the dihydrate not more than 22,0 %, the heptahydrate not more than 50,0 %, the dodecahydrate not more than 61,0 % (40 °C, 3 hours then 105 °C, 5 hours) |
| Water insoluble matter | Not more than 0,2 % on the anhydrous basis |
| Fluoride | Not more than 10 mg/kg (expressed as fluorine) |
| Arsenic | Not more than 1 mg/kg |
| Cadmium | Not more than 1 mg/kg |
| Lead | Not more than 1 mg/kg |
| Mercury | Not more than 1 mg/kg |
Download the full spec sheet (PDF)
Documents and sourcing
Droplet promise. Origin confirmed in every offer. Sample lot record on request, from the producer. SDS, allergen and other statements on request. We work with vetted producers and give you access to U.S.- and EU-stocked material through our partner network.
Data sheet, SDS and COA on request. Every delivery ships with a COA linked to the delivered lot.
Questions buyers ask
What is disodium phosphate (DSP) used for?
Typical uses by industry. Food & beverage: Emulsifying salt in processed cheese; buffer and acidity regulator. Suitability for your product and market is confirmed with the producer's specification.
Which grades can McBoeck supply?
Food grade to EU Regulation 231/2012 (E 339(ii)). FCC / USP grade is available on request for U.S. food and pharma use. Particle size and other grade details follow the producer's specification, on request.
Which documents come with disodium phosphate (DSP)?
Every delivery ships with a COA linked to the delivered lot. Origin confirmed in every offer. Sample lot record on request, from the producer. SDS, allergen and other statements on request.
What does the sample spec sheet show?
Limits for assay, loss on drying, water insoluble matter, fluoride, arsenic, cadmium, lead and mercury, taken from EU Regulation 231/2012. Actual values depend on the producer; the producer's specification and the lot COA are available on request.
How do I get a quote?
Send us the grade, quantity and delivery location through the quote form or at [email protected]. We work with vetted producers and give you access to U.S.- and EU-stocked material through our partner network.
Related phosphates
Dicalcium PhosphateDipotassium Hydrogen Phosphate (DKP)Monocalcium PhosphateMonopotassium Phosphate (MKP)All phosphates
Need disodium phosphate (DSP)?
Send us the grade, quantity and delivery location. Email [email protected] or call +1 (713) 766-6811.