SODIUM PHOSPHATE- ▸ Food buffer: Acidity regulator and buffering agent in food processing.
- ▸ Sequestrant and emulsifying salt: Sequesters metal ions and stabilizes emulsions.
- ▸ Water treatment: pH control and scale management in water-treatment programs.
- ▸ Cleaning: Builder and buffer in cleaning formulations.
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →Monosodium phosphate (MSP, sodium dihydrogenphosphate, sodium phosphate monobasic; CAS 7558-80-7) is an acidic, water-soluble sodium phosphate salt. It is used as an acidity regulator and buffering agent in food, as a sequestrant and emulsifying salt, and in water treatment and cleaning formulations.
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 231-449-2
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Solutions Using This Product
Process-solution guides on this site that specify this chemistry:
- Boiler Blowdown & pH/Alkalinity Control (Water Treatment)
- Citrate & Phosphate Buffer Salts for pH Control in Dairy and Processed Foods (Food & Beverage)
Frequently Asked Questions
What is monosodium phosphate used for?
Monosodium phosphate (MSP, CAS 7558-80-7) is an acidic, water-soluble sodium phosphate salt used as an acidity regulator and buffering agent in food processing, as a sequestrant and emulsifying salt, and in water-treatment and cleaning formulations. We supply it in bulk to food processors, water-treatment operations, and cleaning-product formulators.
What is another name for monosodium phosphate?
Monosodium phosphate is also called MSP, sodium dihydrogen phosphate, or sodium phosphate monobasic, CAS 7558-80-7, formula H2NaO4P (NaH2PO4). It is the monobasic sodium salt of phosphoric acid.
Is monosodium phosphate water soluble?
Yes. MSP is a water-soluble sodium phosphate salt, which is the basis for its use as a soluble acidity regulator, buffer, sequestrant, and emulsifying salt, and for pH control in water-treatment programs.
What grades and bulk packaging are available for monosodium phosphate?
We supply MSP in bags, drums, totes, and bulk. Food-grade and technical specifications are confirmed at quotation with the corresponding SDS and CoA. Contact us with your application and volume for a bulk quote.
What is the cost of bulk monosodium phosphate?
Bulk MSP pricing depends on grade, packaging, volume, and market conditions. Request a quote with your target quantity and ship-to location for current pricing and lead time.
What is the REACH and TSCA regulatory status of Monosodium Phosphate (MSP, Sodium Phosphate Monobasic)?
Monosodium Phosphate (MSP, Sodium Phosphate Monobasic) (CAS 7558-80-7) is subject to U.S. TSCA Inventory requirements; supplying it into the EU requires valid REACH registration ((EC) No 1907/2006). RawSource cannot verify a third-party supplier's registrations — buyers should require documented TSCA and REACH compliance for their jurisdiction and volume (EC 231-449-2).
What is the molecular formula of Monosodium Phosphate?
The molecular formula of Monosodium Phosphate is H2NaO4P.
What is the molecular weight of Monosodium Phosphate?
The molecular weight of Monosodium Phosphate is 119.977 g/mol (PubChem).
What is the CAS number of Monosodium Phosphate?
The CAS number of Monosodium Phosphate is 7558-80-7.