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).