What does the restriction note for POTASSIUM SULFITE mean?

The restriction field for POTASSIUM SULFITE 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.

What function does POTASSIUM SULFITE serve in cosmetics?

According to the EU CosIng inventory, POTASSIUM SULFITE carries the following function designation(s): ANTIOXIDANT, HAIR WAVING OR STRAIGHTENING, PRESERVATIVE, REDUCING.

InventoryRef 3703111/08/2020

POTASSIUM SULFITE

Q: How do I check if my formula contains POTASSIUM SULFITE?

Use the INCI Checker tool on CosIng Checker to paste your full ingredient list and scan it against all EU annex records and allergen flags in one step.

Potassium sulphite

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

INCI Checker Search similar

Inventory details for POTASSIUM SULFITE

INCI name

POTASSIUM SULFITE

Description

Potassium sulphite

Annex records for POTASSIUM SULFITE

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

10117-38-1 / 23873-77-0

233-321-1 / -

Restriction

III/99 V/9

Function

ANTIOXIDANT HAIR WAVING OR STRAIGHTENING PRESERVATIVE REDUCING

How POTASSIUM SULFITE appears in the CosIng inventory

The CosIng inventory lists POTASSIUM SULFITE 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 SULFITE is also tagged with 4 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 SULFITE 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 SULFITE 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 SULFITE carries the following function designation(s):

CAS 10117-38-1 / 23873-77-0 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.

View CAS records

Use the INCI Checker tool to paste your full ingredient list and scan it against all EU annex records and allergen flags in one step.

Open INCI Checker

Source note for POTASSIUM SULFITE

This page combines the CosIng inventory entry for POTASSIUM SULFITE 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 SULFITE and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

View sources View updates

Tools & next steps

Check your formula

Scan a full INCI list to detect POTASSIUM SULFITE and any linked EU annex restrictions or allergen flags.

INCI Checker

Search similar ingredients

Find other inventory ingredients and annex entries related to POTASSIUM SULFITE, its identifiers or nearby name variants.