Food & beverage
Acidity regulator, buffer and emulsifying salt.
Ingredients / Phosphates / Monosodium Phosphate (MSP)
Phosphates
Monosodium Phosphate (MSP) (E 339(i))
Monosodium phosphate (MSP) for U.S. manufacturers, from vetted producers. FCC / USP grade on request. Download the sample spec sheet, then send us your grade and quantity.
TRACED · CERTIFIED · RELIABLE · TRANSPARENT · TESTED
Key facts
| CAS No. | 89140-32-9 |
|---|---|
| E-number (EU) | E 339(i) |
| Synonyms | Monosodium monophosphate, Acid monosodium monophosphate, Monosodium orthophosphate, Monobasic sodium phosphate, Sodium dihydrogen monophosphate |
| Chemical formula | Anhydrous: NaH2PO4 Monohydrate: NaH2PO4 · H2O Dihydrate: NaH2PO4 · 2H2O |
| Molecular weight | Anhydrous: 119,98 Monohydrate: 138,00 Dihydrate: 156,01 |
| Description | A white odourless, slightly deliquescent powder, crystals or granules |
| Solubility | Freely soluble in water. Insoluble in ethanol or ether |
| Grades | EU Reg. 231/2012 (E 339(i)) 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 monosodium phosphate (MSP) is
Chemical name: Sodium dihydrogen monophosphate. Formula Anhydrous: NaH2PO4 Monohydrate: NaH2PO4 · H2O Dihydrate: NaH2PO4 · 2H2O, molecular weight Anhydrous: 119,98 Monohydrate: 138,00 Dihydrate: 156,01. A white odourless, slightly deliquescent powder, crystals or granules. Freely soluble in water. Insoluble in ethanol or ether. (Source: EU Regulation 231/2012, E 339(i).)
Applications by industry
Sample specification
Values from EU Regulation 231/2012 (E 339(i)), 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 60 °C for one hour and then at 105 °C for four hours, contains not less than 97 % of NaH2PO4 P2O5 content between 58,0 % and 60,0 % on the anhydrous basis |
|---|---|
| Loss on drying | The anhydrous salt loses not more than 2,0 %, the monohydrate not more than 15,0 %, the dihydrate not more than 25 % (60 °C, 1 hour then 105 °C, 4 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 monosodium phosphate (MSP) used for?
Typical uses by industry. Food & beverage: Acidity regulator, buffer and emulsifying salt. 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(i)). 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 monosodium phosphate (MSP)?
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)Disodium Phosphate (DSP)Monocalcium PhosphateAll phosphates
Need monosodium phosphate (MSP)?
Send us the grade, quantity and delivery location. Email [email protected] or call +1 (713) 766-6811.