What does the restriction note for POTASSIUM METABISULFITE mean?

The restriction field for POTASSIUM METABISULFITE reads: III/99 V/9. This is the restriction note from the CosIng inventory. For authoritative conditions and limits, always refer to the linked annex entries.

InventoryRef 3699411/08/2020

POTASSIUM METABISULFITE

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Dipotassium disulphite

POTASSIUM METABISULFITE is linked to 2 EU annex records on this page. Inventory note: III/99 V/9.

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Inventory details for POTASSIUM METABISULFITE

INCI name

POTASSIUM METABISULFITE

INN name

potassium metabisulfite

Description

Dipotassium disulphite

Annex records for POTASSIUM METABISULFITE

Annex III Restriction reference

Entry 99

Inorganic sulfites and bisulfites (12)

Annex V Restriction reference

Entry 9

SODIUM SULFITE / AMMONIUM BISULFITE / AMMONIUM SULFITE / POTASSIUM SULFITE / POTASSIUM hydrogen SUL…

CAS: 7757-83-7 / 10192-30-0 / 10196-04-0 / 10117-38-1 / 7773-03-7 / 7631-90-5 / 7681-57-4 / 16731-55-8

EC: 231-821-4 / 233-469-7 / 233-484-9 / 233-321-1 / 231-870-1 /231-548-0 / 231-673-0 / 240-795-3

Key data

CAS

16731-55-8 / 4429-42-9

240-795-3 / -

Restriction

III/99 V/9

Function

HAIR WAVING OR STRAIGHTENING PRESERVATIVE REDUCING

How POTASSIUM METABISULFITE appears in the CosIng inventory

The CosIng inventory lists POTASSIUM METABISULFITE as a cosmetic ingredient and this page links it to 2 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.

POTASSIUM METABISULFITE is also tagged with 3 cosmetic functions in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

POTASSIUM METABISULFITE appears in the EU CosIng inventory and has linked annex records. Check the annex records above for applicable restrictions, concentration limits and conditions of use. Annex II listing means prohibited; Annex III means restricted; Annexes IV, V and VI mean permitted under specified conditions.

The restriction field for POTASSIUM METABISULFITE reads: "III/99 V/9". This is the restriction note recorded in the CosIng inventory for this ingredient. For authoritative conditions and limits, always refer to the linked annex entries above.

According to the EU CosIng inventory, POTASSIUM METABISULFITE carries the following function designation(s):

CAS 16731-55-8 / 4429-42-9 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

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Source note for POTASSIUM METABISULFITE

This page combines the CosIng inventory entry for POTASSIUM METABISULFITE with 2 linked Annex II–VI records from the local dataset built from public European Commission cosmetic ingredient materials.

Use this inventory page to research POTASSIUM METABISULFITE and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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Tools & next steps

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