AKA: 7783-28-0, Diammonium hydrogen phosphate, Ammonium phosphate dibasic, Phosphoric acid, Diammonium salt, Akoustan A, Fyrex, Pelor, Dibasic ammonium phosphate, Dibasic
Diammonium hydrogenorthophosphate
Solubility Insoluble in ethanol, acetone
State
Ammonium phosphate is a white solid with a weak odor of ammonia. Sinks and mixes with water. (USCG, 1999)
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
CIR Safety Findings
Mixed Skin Irritation Results
3 studies / 2 irritating / 1 not irritating / reactions slight to mild (CIR 710)
Eye Irritant in Testing
1 study / 1 irritating / reactions slight to moderate (CIR 710)
Concentration Guide
0%50%100%
CIR reported use · 2015 survey
Regulatory Status
JAPAN⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR
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