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Ingredient Dictionary

POTASSIUM SULFATE

Potassium sulfate is an inorganic potassium salt and a potassium salt.

Molecular structure

Definition

Potassium sulfate is an inorganic potassium salt and a potassium salt.

Source: PubChem

US FDA substance register · UNII 1K573LC5TV · registered name Potassium sulfate · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Adjusts thicknessVISCOSITY CONTROLLING

Safety & regulatory references

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

Source: Korea toxic substances GHS register (NIER)

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

Official labels & definitions

JCIA labelling name 硫酸Ｋ: 本品は、硫酸（＊）のカリウム塩であり、次の化学式で表される。

Source: JCIA labelling names (Japan)

Names & identifiers

POTASSIUM SULFATEINCI포타슘설페이트Korean label name (MFDS standard)Sulfuric acid, dipotassium saltSynonym硫酸ＫJapanese labelling name
CAS No.chemical registry number
7778-80-5
EC No.EU chemical inventory number
231-915-5
DTXSIDUS EPA chemical ID
DTXSID6029701
DTXCIDUS EPA compound ID
DTXCID709701
IUPAC
Dipotassium sulfate
Molecular formula
K2O4S
Molecular weight
174.25 g/mol

Measured properties

Appearance
Dry Powder, Large Crystals, Liquid, Other Solid, CBI · Colourless or white crystals or crystalline powder
Odour
ODORLESS · odourless
Boiling point
1689 °C · 1689 °C @760 [mm Hg]
Melting point
1067 °C
Solubility
Freely soluble in water, insoluble in ethanol · ITS SOLUBILITY IN WATER IS DECR BY KCL OR (NH4)2SO4
Density
2.66 · 2.66 g/cm³
Stability
PERMANENT IN AIR
pH
Between 5,5 and 8,5 (5 % solution) · AQ SOLN IS NEUTRAL, PH ABOUT 7
Melting/freezing point
1069 ℃
Initial boiling point and range
1698 ℃
Vapour pressure
0.4 ㎜Hg
Water solubility
111 g/100㎖
Relative density
2.66
Molecular weight
174.27

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 22 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.

  • Soil amendments5
  • Crystal growth modifiers (nucleating agents)4
  • Flavouring and nutrient3
  • Viscosity modifier2
  • Processing aids not otherwise specified2
  • Diluent1
  • Lubricating agent1
  • Propellants, non-motive (blowing agents)1
3 other uses
  • Cleaning agent1
  • Catalyst1
  • Thickening agent1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

1 skin studies and 1 eye studies are on record.

Classed as low2

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 2 studies
  • Category 6.3B (Category 3)
    Skin Irritation · Read Across
  • Studies Indicate No Significant Irritation
    eye irritation: in vivo · Screening · other guideline: Japanese Ministry of Agriculture, Forestry and Fisheries (JMAFF), 12 Nousan, Notification No 8147, November 2000, including the most recent partial revisions. according to OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to EU Method B.5 (Acute Toxicity: Eye Irritation / Corrosion) according to EPA OPPTS 870.2400 (Acute Eye Irritation) according to

Source: US EPA CompTox dashboard

Related literature

Linked databases 20

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