How much products actually contain
No product states its amount yet.
Of the products containing it, 0 list it before the 1% line and 1 after it (usually 1% or less).
Products using this ingredient
1 of 1 confirmed · likeliest to carry enough first
Definition
Potassium Metabisulfite is the inorganic salt that conforms to the formula:
Cosmetic roles
Reduces other ingredientsREDUCINGStops microbes growing in the productPRESERVATIVECurls or straightens hairHAIR WAVING OR STRAIGHTENING
Safety & regulatory references
- Restricted
- China · South Korea · Taiwan
Source: MFDS (Korea) cosmetic regulatory information
Argentina · Brazil
- Field of application and/or use : (a) an oxidizer in hair dyes (b) straighteners hair products (c) facial sunless d) Other self-tanning
- Maximum concentration permitted at final product : (a) 0,67% expressed as SO 2free (b) 6.7% expressed as SO 2 free (c) 0.45% expressed as SO 2free d) 0,40% expressed as SO 2free
ASEAN
- Field of application and/or use : (a) Oxidative hair dye products (b) Hair straightening products (c) Self- tanning products for the face (d) Other self- tanning products
- Maximum authorised concentration in the finished cosmetic product : (a) 0.67 % expressed as free SO2 (b) 6.7 % expressed as free SO2 (c) 0.45 % expressed as free SO2 (d) 0.40 % expressed as free SO2
- Other limitations and requirements : For purposes other than inhibiting the development of microorganisms in the product. This purpose has to be apparent from the presentation of the product As a preservative, see Annexe VI, Part 1, No 9
European Union
- Product Type, body parts : (a) Oxidative hair dye products (b) Hair straightening products (c) Self-tanning products for the face (d) Other self-tanning products
- Maximum concentration in ready for use preparation : (a) 0.67% (as free SO2) (b) 6.7% (as free SO2) (c) 0.45% (as free SO2) (d) 0.40% (as free SO2)
- Other : For purposes other than inhibiting the development of micro-organisms in the product. This purpose has to be apparent from the presentation of the product
- Maximum concentration in ready for use preparation : 0.2% (as free SO2)
Source: MFDS (Korea) cosmetic regulatory information
Restriction III/99 V/9
Source: EU CosIng ingredient list
Reviewed by CIR: Sulfites
Reviewed by CIR: Final Report on the Safety Assessment of Sodium Sulfite, Potassium Sulfite, Ammonium Sulfite, Sodium Bisulfite, Ammonium Bisulfite, Sodium Metabisulfite, and Potassium Metabisulfite
More data — names, identifiers, properties, test records, literature
Official labels & definitions
JCIA labelling name ピロ亜硫酸Ｋ: 本品は、次の化学式で表される無機塩である。
Source: JCIA labelling names (Japan)
Names & identifiers
POTASSIUM METABISULFITEINCI포타슘메타바이설파이트Korean label name (MFDS standard)ピロ亜硫酸ＫJapanese labelling name
- CAS No.chemical registry number
- 16731-55-8 / 4429-42-9
- CAS No.chemical registry number
- 4429-42-9
- CAS No.chemical registry number
- 16731-55-8
- EC No.EU chemical inventory number
- 240-795-3
- EC No.EU chemical inventory number
- 240-795-3
- DTXSIDUS EPA chemical ID
- DTXSID1021293
- DTXCIDUS EPA compound ID
- DTXCID401293
- IUPAC
- Dipotassium oxido(oxo)-lambda~4~-sulfanesulfonate
- Molecular formula
- K2O5S2
- Molecular weight
- 222.31 g/mol
Measured properties
- Appearance
- Potassium metabisulfite appears as a white granular or powdery solid with a sharp odor of sulfur dioxide. Decomposes at 150 to 190 °C. Density 2.3 g / cm3. Contact severely irritates skin, eyes, and mucous membranes. Low toxicity. Used as a food preservative and an antioxidant. · Dry Powder, Large Crystals
- Odour
- Sulfur dioxide odor · Pungent, sharp odor
- Melting point
- Decomposes at approximately 150 °C
- Solubility
- Freely soluble in water, insoluble in alcohol · Reacts with acid solutions, insoluble in ethanol
- Density
- 2.3 g/cu cm · Relative density (water = 1): 2.34
- Stability
- When stored at a maximum temperature of 25 °C and a maximum relative humidity of 45%, the shelf life is 6 months.
Values measured on the substance itself, not a specification for a commercial raw material.
Source: PubChem
What products actually use it for
What the 17 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.
- Hair waving or straightening (EPA)3
- Reducing agent3
- Preservative2
- Fragrance1
- Antioxidant1
- Bleaching agent1
- Dye1
- Food preservative (EPA)1
4 other uses
- Stabilizing agent1
- Oxidizing agent1
- Biocide1
- Filler1
Source: US EPA CompTox dashboard
Related literature
- Unexpected spice allergy in the meat industry. · 2001
- Final Report on the Safety Assessment of Sodium Sulfite, Potassium Sulfite, Ammonium Sulfite, Sodium Bisulfite, Ammonium Bisulfite, Sodium Metabisulfite and Potassium Metabisulfite · 2003
- Sulfites · 2023
- Is there a correlation between birth rates and the full moon? · 2019
- Effects of Drying Pretreatments on the Cell Wall Composition of Grape Tissues. · 1998
Linked databases 17
- Australian Industrial Chemicals Inventory (AICIS)
- ChEMBL
- China inventory of existing ingredients (IECIC)
- EU CosIng ingredient list 2
- JCIA labelling names (Japan)
- Korea Cosmetic Association ingredient dictionary
- MFDS (Korea) cosmetic ingredient register 2
- MFDS (Korea) cosmetic regulatory information 2 3
- PubChem
- Tlooto literature search 2 3 4 5
- UniChem cross-reference IDs 2
- US Cosmetic Ingredient Review (CIR) 2 3
- US EPA CompTox dashboard 2
- US EPA DSSTox chemical database
- US FDA substance registration (GSRS)
- Wikidata
- Wikipedia · English · Japanese · Chinese