Ingredient Dictionary

AMMONIUM PHOSPHATE

Ammonium dihydrogen phosphate is the ammonium salt of phosphoric acid (molar ratio 1:1).

Definition

Ammonium dihydrogen phosphate is the ammonium salt of phosphoric acid (molar ratio 1:1). It has a role as a fertilizer. It contains a dihydrogenphosphate.

Source: PubChem

US FDA substance register · UNII 09254QB17T · registered name AMMONIUM PHOSPHATE, MONOBASIC · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Keeps pH steadyBUFFERINGCares for the mouthORAL CARE

Safety & regulatory references

Not classified under Korea’s toxic-substance GHS list · existing chemical substance

Source: Korea toxic substances GHS register (NIER)

Reviewed by CIR: Safety Assessment of Phosphoric Acid and Its Salts as Used in Cosmetics

Source: US Cosmetic Ingredient Review (CIR)

More data — names, identifiers, properties, test records, literature

Official labels & definitions

JCIA labelling name リン酸アンモニウム: 本品は、リン酸（＊）のアンモニウム塩であり、次の化学式で表される。

Source: JCIA labelling names (Japan)

Names & identifiers

AMMONIUM PHOSPHATEINCI암모늄포스페이트Korean label name (MFDS standard)Phosphoric acid, ammonium salt (1:1)Synonymリン酸アンモニウムJapanese labelling name

CAS No.chemical registry number: 7722-76-1
EC No.EU chemical inventory number: 231-764-5
DTXSIDUS EPA chemical ID: DTXSID5029689
DTXCIDUS EPA compound ID: DTXCID109689

IUPAC: Ammonium dihydrogen phosphate
Molecular formula: H6NO4P
Molecular weight: 115.025 g/mol

Measured properties

Appearance: Dry Powder, Other Solid, Large Crystals, CBI, Liquid · White solid with a slight odor of ammonia, [CAMEO]
Odour: Odorless · Faint acid
Melting point: 190 °C
Solubility: Slightly soluble in ethanol, insoluble in acetone · 40.4 g/100 g water at 25 °C
Density: 1.80 g/cu cm · 1.803 @25 °C
Stability: Stable in air
pH: pH of 0.2 Molar aq soln: 4.2 · 4.2 ( (for a 0.2 molar aqueous solution))
Melting/freezing point: 190 ℃
Vapour pressure: 0.50 ㎜Hg(125 ℃)
Water solubility: 36.8 g/100㎖(368g/l 20℃)
Vapour density: 4.0
Relative density: 1.803
Molecular weight: 115.03

Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.

Source: PubChem · KOSHA safety data sheets (Korea)

What products actually use it for

What the 27 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.

Flame retardant7
Soil amendments7
Fire extinguishing agent4
pH regulating agent3
Processing aids not otherwise specified2
Brightener1
Biocide1
Leavening agent (EPA)1

1 other uses

Flavouring and nutrient1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

3 skin studies and 3 eye studies are on record.

Classed as moderate1Classed as low1

The studies disagree (the most common conclusion covers 50%), so they do not establish that this ingredient is irritating. These tests are on the raw material itself; irritation at the amount in a finished product is a different question.

See all 6 studies

Moderate or Mild Irritation
skin irritation: in vivo · Screening · other guideline: No data according to
Category 6.3B (Category 3)
Skin Irritation · Read Across
Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) equivalent or similar to
Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) equivalent or similar to
Moderate or Mild Irritation
eye irritation: in vivo · Screening · other guideline: No data according to
Category 6.4A (Category 2A)
Eye Irritation · Read Across