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Ingredients

Ingredient Dictionary

TETRAPOTASSIUM PYROPHOSPHATE

Molecular structure

How much products actually contain

No product states its amount yet.

Of the products containing it, 7 list it before the 1% line and 0 after it (usually 1% or less).

Products using this ingredient

7 of 7 confirmed · likeliest to carry enough first

Definition

US FDA substance register · UNII B9W4019H5G · registered name POTASSIUM PYROPHOSPHATE · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Keeps pH steadyBUFFERINGBinds metal ions to prevent spoilageCHELATINGCares 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 ピロリン酸4K: 本品は、ピロリン酸の四カリウム塩であり、次の化学式で表される。

Source: JCIA labelling names (Japan)

Names & identifiers

TETRAPOTASSIUM PYROPHOSPHATEINCI테트라포타슘파이로포스페이트Korean label name (MFDS standard)Diphosphoric acid, tetrapotassium saltSynonymピロリン酸4KJapanese labelling name
CAS No.chemical registry number
7320-34-5
EC No.EU chemical inventory number
230-785-7
DTXSIDUS EPA chemical ID
DTXSID3036446
DTXCIDUS EPA compound ID
DTXCID1016446
IUPAC
Tetrapotassium diphosphate
Molecular formula
K4O7P2
Molecular weight
330.334 g/mol

Measured properties

Appearance
Potassium tetrapyrophosphate is a whitish-colored powdered solid. It is toxic by ingestion, and/or inhalation. Contact with the substance should be avoided. · Liquid, Other Solid, Dry Powder, CBI, Large Crystals
Boiling point
300 °C @760 [mm Hg]
Melting point
1090 °C · 180 °C
Solubility
Soluble in water, insoluble in ethanol · Solubility in water, g/100ml at 25 °C: 187 (very good)
Density
2.33 @25 °C
pH
Between 10,0 and 10,8 (1 % solution) · 10.5
Colour
colourless, white
Odour
odourless
Melting/freezing point
1090 ℃
Initial boiling point and range
&amp, gt, 1500 ℃
Vapour pressure
0.0000000206 ㎜Hg (25℃(est.))
Water solubility
187 g/100㎖ (25℃)
Relative density
1.1
n-Octanol/water partition coefficient (Kow)
-10.45 (est.)
Molecular weight
330.35

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 51 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.

  • Chelating agent26
  • pH regulating agent5
  • Soil amendments4
  • Surfactant (surface active agent)3
  • Solvent2
  • Dispersing agent2
  • Corrosion inhibitor2
  • Other1
6 other uses
  • Lubricating agent1
  • Cleaning agent1
  • Surface modifier1
  • Thickening agent1
  • Emulsifier1
  • Oxidizing agent1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

3 skin studies and 4 eye studies are on record.

Classed as low1

The study conclusions largely agree (100%). These tests are on the raw material itself; irritation at the amount in a finished product is a different question.

See all 7 studies
  • Studies Indicate No Significant Irritation
    skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) equivalent or similar to
  • Ambiguous
    skin irritation: in vivo · Screening · other guideline: Code of Federal Regulations, section 1500.41 according to
  • Category 6.3A (Category 2)
    Skin Irritation · Read Across
  • Category 6.4A (Category 2A)
    Eye Irritation · Read Across
  • Serious eye damage/eye irritation - Category 2A
    Eye Irritation · Screening
  • Moderate or Mild Irritation
    eye irritation: in vivo · Screening · other guideline: Code of Federal Regulations, section 1500.42 according to
  • Severe Irritation
    eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) equivalent or similar to

Source: US EPA CompTox dashboard

Linked databases 17