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Ingredient function 76 ingredients · Page 1/2

REDUCING

Changing the chemical nature of another ingredient by adding hydrogen (or removing oxygen).

Definition provenance: European Commission CosIng ingredient-function terminology.

76 ingredients in the EU CosIng inventory carry the REDUCING function designation.

Ingredients with the REDUCING function

BILIRUBIN

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Bilirubin is a red-orange colored metabolite formed during the breakdown of hemoglobin in vertebrates that conforms to the formula

CAS 635-65-4

2(3H)-Furanone, Dihydro-3-Mercapto-; Butyric acid, 4-hydroxy-2-mercapto-, gamma-lactone

CAS 14032-62-3

Glycine, N-(N-L-.gamma.-glutamyl-L-cysteinyl)-

CAS 70-18-8

Iron Powder is the element consisting of powdered metallic iron

CAS 7439-89-6

Magnesium Powder is an inorganic metal consisting of powdered magnesium

CAS 7439-95-4

2,2-Dihydroxy-1H-indene-1,3-(2H)-dione

CAS 485-47-2

Octapeptide-15 is a synthetic peptide consisting of aspartic acid, glutamine, histidine, proline, serine and valine.

Oligopeptide-30 is a synthetic peptide containing 12 amino acids consisting of arginine, glutamic acid, leucine, lysine, and tyrosine

rh-Polypeptide-28 is a single chain recombinant human peptide, produced by fermentation in E. coli. The starting gene is directly isolated …

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S-DNA APTAMER-2

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s-DNA Aptamer-2 is a single stranded DNA molecule produced synthetically that folds into a well-defined three-dimensional structure contain…

CAS 2145134-87-6

S-DNA APTAMER-3

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s-DNA Aptamer-3 is a single stranded DNA molecule produced synthetically that folds into a well-defined three-dimensional structure contain…

CAS 2421288-96-0

S-DNA APTAMER-4

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s-DNA Aptamer-4 is a single stranded DNA molecule produced synthetically that folds into a well-defined three-dimensional structure contain…

CAS 2442621-49-8

S-DNA APTAMER-5

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s-DNA Aptamer-5 is a single stranded DNA molecule produced synthetically that folds into a well-defined three-dimensional structure contain…

sh-Decapeptide-7 is a single chain recombinant human peptide, produced synthetically to be identical to the protein, Enkephalin. It contain…

SH-Octapeptide-4 is a recombinant human peptide produced synthetically to be identical to the protein, Enkephalin. It contains 8 amino acid…

These widely assigned CosIng terms provide populated comparison pages; they are not presented as semantic equivalents of the current function.

How the REDUCING function is used in CosIng

The REDUCING function is assigned by the European Commission in the CosIng ingredient inventory. This page currently lists 76 ingredients carrying that function label in the dataset, which helps you move from a functional claim to the exact ingredients that use it.

Changing the chemical nature of another ingredient by adding hydrogen (or removing oxygen).

Function assignments come from official EU CosIng data. They describe intended cosmetic use, but they do not replace regulatory review of each linked ingredient and any annex records tied to it.

Frequently asked questions

The REDUCING function, as defined in the EU CosIng database, describes the role this group of ingredients plays in a cosmetic formulation. There are currently 76 ingredients in the EU CosIng inventory assigned this function. Function labels are standardised terms used in Product Information Files (PIF) and ingredient declarations.

Yes. An ingredient's function in the CosIng inventory is independent of its regulatory status. An ingredient with the REDUCING function may also be listed in Annex II (prohibited), Annex III (restricted), or other annexes. Always check each ingredient's annex records for applicable conditions before formulating.

Ingredient functions are documented in the Product Information File (PIF) as part of the cosmetic product safety assessment. They describe the intended role of each ingredient in the formulation and support the safety assessor's review. Functions do not appear on consumer-facing product labels, which list only INCI names.

Use the INCI Checker to paste your full ingredient list and screen it against all Annex II–VI restrictions, CMR classifications and allergen flags from the EU CosIng database.

Tools & next steps

Check your formula

Scan a full INCI list, then review which matched ingredients are tagged with the REDUCING function.

INCI Checker

Browse all functions

See the full list of cosmetic ingredient function categories in the EU CosIng inventory.

All functions

Review linked regulatory evidence

20 ingredients in this function have structured links to EU annex records.

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