Ammonium Phosphate
AKA “Ammonium dihydrogen phosphate, 7722-76-1, Ammonium biphosphate, MONOAMMONIUM PHOSPHATE, Ammonium dihydrogen orthophosphate, Phosphoric acid, monoammonium salt, Ammonium monophosphate, Ammonium dihydrophosphate, Primary ammonium phosphate, Monobasic ammonium phosphate”
Ingredient
Ingredient Facts
Ammonium phosphate
AKA: Ammonium dihydrogen phosphate, 7722-76-1, Ammonium biphosphate, MONOAMMONIUM PHOSPHATE, Ammonium dihydrogen orthophosphate, Phosphoric acid, Monoammonium salt, Ammonium monophosphate, Ammonium dihydrophosphate, Primary ammonium phosphate, Monobasic ammonium phosphate
Ingredient · Buffering · EWG: 4
Synthetic
Not Clean
Ammonium dihydrogenorthophosphate
Effective at 4.78%
Solubility Slightly soluble in ethanol; insoluble in acetone
Formula
H6NO4P
Mol. Weight
115.03
CAS #
7722-76-1
Form
Powder
State
Dry Powder, Pellets or Large Crystals; Pellets or Large Crystals; NKRA; Other Solid; Liquid; Dry Powder
See origin →
Functions
Buffering
Oral Care
Stabilizes pH
Reduces Inflammation
Locks In Moisture
Supports dental health
Maintains optimal pH
Traditional Use
A synthetic salt developed for industrial uses. Incorporated into cosmetics in the 20th century as a buffering and pH-regulating agent with no significant traditional use history.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Concentration Guide
0.25%
9.3%
0%13%
Effective Range
CIR reported use: 0.25-9.3
Regulatory Agencies
Safety Assessment of Phosphoric Acid and Its Salts as Used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Ammonium Phosphate
European Commission
EU Cosmetic Ingredient Database (CosIng)
Diammonium Phosphate
European Commission
EU Cosmetic Ingredient Database (CosIng)
Metaphosphoric Acid
European Commission
EU Cosmetic Ingredient Database (CosIng)
Phosphoric Acid
European Commission
EU Cosmetic Ingredient Database (CosIng)
Phosphoric Acid
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Safety assessment of diammonium phosphate and urea used in the manufacture of cigarettes.
Stavanja MS, Curtin GM, Ayres PH, Bombick ER, Borgerding MF et al.
Experimental and toxicologic pathology : official journal of the Gesellschaft fur Toxikologische Pathologie, 2008
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR