AMMONIUM PHOSPHATE- ▸ Fertilizer: Water-soluble nitrogen-phosphorus source for fertigation and greenhouse nutrition.
- ▸ Fire suppression: Active agent in ABC dry-chemical extinguishers and flame retardant for cellulosics.
- ▸ Food leavening: Leavening acid and acidity regulator in baked goods.
- ▸ Fermentation nutrient: Phosphorus-nitrogen source in yeast and microbial culture media.
- ▸ Ceramics: Binder in ceramic applications.
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 →Monoammonium phosphate (MAP, ammonium dihydrogenphosphate; CAS 7722-76-1) is a water-soluble ammonium phosphate salt. It is used as a fertilizer and water-soluble plant nutrient, as the active in ABC dry-chemical fire extinguishers and as a flame retardant for cellulosic materials, and as a leavening acid and acidity regulator in food. It also serves in fermentation nutrient solutions and ceramic binders.
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 231-764-5
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:
- Water-Soluble Fertilizer Salts for Fertigation (Agriculture)
Frequently Asked Questions
What is monoammonium phosphate used for?
Monoammonium phosphate (MAP, CAS 7722-76-1) is used as a water-soluble nitrogen-phosphorus fertilizer, as the active agent in ABC dry-chemical fire extinguishers and as a flame retardant for cellulosic materials, and as a leavening acid and acidity regulator in food. It also serves in fermentation nutrient media and ceramic binders.
What is another name for monoammonium phosphate?
Monoammonium phosphate is also known as MAP and as ammonium dihydrogen phosphate (CAS 7722-76-1, formula H6NO4P). These names refer to the same water-soluble ammonium phosphate salt.
How does monoammonium phosphate work in fire extinguishers?
MAP is the active agent in ABC dry-chemical extinguishers, where it interrupts combustion and forms a barrier on burning material, and it functions as a flame retardant on cellulosic materials. This makes it the standard powder for multipurpose Class A, B, and C extinguishers.
Is monoammonium phosphate water soluble?
Yes. MAP is a water-soluble ammonium phosphate salt, which is why it is used as a water-soluble plant nutrient for fertigation and greenhouse nutrition and in fermentation nutrient solutions. Solubility data is given in the CoA and SDS.
What is the cost of bulk monoammonium phosphate?
Bulk MAP pricing depends on grade (fertilizer, technical, or food grade), volume, and packaging, so RawSource quotes against your specification rather than a fixed price. Submit a bulk RFQ with your target grade and quantity; HS heading is 2835.29 and a CoA and SDS accompany each shipment.
What is the REACH and TSCA regulatory status of Monoammonium Phosphate (MAP)?
Monoammonium Phosphate (MAP) (CAS 7722-76-1) 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 231-764-5).