What does the restriction note for DEHYDROACETIC ACID mean?

The restriction field for DEHYDROACETIC ACID reads: V/13. This is the restriction note from the CosIng inventory. For authoritative conditions and limits, always refer to the linked annex entries.

How do I check if my formula contains DEHYDROACETIC ACID?

Use the INCI Checker to screen a full ingredient list across selected markets, or use the substance market comparison to review this identity across all supported market datasets.

InventoryRef 3318511/08/2020

DEHYDROACETIC ACID

3-Acetyl-6-methyl-2H-pyran-2,4(3H)-dione

DEHYDROACETIC ACID is linked to 1 EU annex record on this page. Inventory note: V/13.

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Regulatory evidence by market

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Market	Evidence status	Records	Source language
European Union	Evidence linked Positive-list entry with conditions Open this evidence	1	English and EU languages
Great Britain	Source mapped Official source mapped; ingredient rule not imported	0	English
Canada	Source mapped Official source mapped; ingredient rule not imported	0	English and French
New Zealand	Evidence linked Permitted list with conditions Open this evidence	2	English
ASEAN	Source mapped Official source mapped; ingredient rule not imported	0	English and national languages
China	Source mapped Official source mapped; ingredient rule not imported	0	Chinese with selected English material
Japan	Source mapped Official source mapped; ingredient rule not imported	0	Japanese; official English translation available
South Korea	Source mapped Official source mapped; ingredient rule not imported	0	Korean with some English names
United States	Source mapped Official source mapped; ingredient rule not imported	0	English
Australia	Source mapped Official source mapped; ingredient rule not imported	0	English
Brazil	Source mapped Official source mapped; ingredient rule not imported	0	Portuguese with INCI crosswalks
India	Source mapped Official source mapped; ingredient rule not imported	0	English and Hindi
Saudi Arabia	Source mapped Official source mapped; ingredient rule not imported	0	Arabic and English

Chemical identity and properties

PubChem 2D chemical structure for CAS 16807-48-0

CAS 16807-48-0CAS 520-45-6PubChem CID 122903

Dehydroacetic acid

Dehydroacetic acid is a pyran-2,4-dione substituted at position 3 by an acetyl group and at position 6 by a methyl group. A fungicide and bactericide it is used primarily in processed fruit and vegetables. It has a role as a fungicide, an antibacterial agent and a plasticiser. It is a pyran-2,4-dione and a ketone. — ChEBI

IUPAC name: 3-acetyl-6-methylpyran-2,4-dione

Molecular formula: C8H8O4
Molecular weight: 168.15 g/mol
Exact mass: 168.04225873 Da
XLogP3: 0.3
Topological polar surface area: 60.4 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 4
Covalent units: 1
Defined stereocentres: 0

Also known as

520-45-63-Acetyl-6-methyl-2H-pyran-2,4(3H)-dione2H-Pyran-2,4(3H)-dione, 3-acetyl-6-methyl-MethylacetopyrononeBiocide 470FAcetic acid, dehydro-3-Acetyl-6-methyl-2,4-pyrandione3-Acetyl-6-methyl-pyran-2,4-dione

16 more reported names

3-acetyl-6-methyl-3,4-dihydro-2H-pyran-2,4-dioneCHEBI:1374263-Acetyl-6-methylpyrandione-2,4NSC-87702-Acetyl-5-hydroxy-3-oxo-4-hexenoic acid, .delta.-lactone3-acetyl-6-methyl-2,4-dioxo-3H-pyranDehydroacetic acid [ISO]GlyTouCan:G82156FZEpitope ID:613424DTXCID9014Dehydroacetic acid (Standard)HY-B1211RPGRHXDWITVMQBC-UHFFFAOYSA-MSK2505NSC87704-Hexenoic acid, .delta.-lactone

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:137426
ChEMBL:CHEMBL284127
EPA DTXSID:DTXSID6020014
PubMed:23433124

Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

PubChem 2D chemical structure for CAS 771-03-9

CAS 771-03-9PubChem CID 54678494

3-Acetyl-4-hydroxy-6-methyl-2H-pyran-2-one

3-Acetyl-4-hydroxy-6-methyl-2H-pyran-2-one is a fungicide used against moulds on fresh and dried fruit. Now superseded. — Toxin and Toxin Target Database (T3DB)

IUPAC name: 3-acetyl-4-hydroxy-6-methylpyran-2-one

Molecular formula: C8H8O4
Molecular weight: 168.15 g/mol
Exact mass: 168.04225873 Da
XLogP3: 1.0
Topological polar surface area: 63.6 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 4
Covalent units: 1
Defined stereocentres: 0

Also known as

RefChem:10672582H-Pyran-2-one, 3-acetyl-4-hydroxy-6-methyl-3-acetyl-2-hydroxy-6-methyl-4H-pyran-4-one2KAG279R6RdehydroacetateNSC-1391503-Acetyl-4-hydroxy-6-methyl-pyran-2-oneDehydroacetic enol form

16 more reported names

dehydroacetic-acidEINECS 212-227-4Caswell No. 2783-Acetyl-4-hydroxy-6-methyl-2-pyroneDHA (VAN)Dehydroacetic Acid [USAN]UNII-2KAG279R6RHSDB 291DEHYDROACETIC ACID [II]DEHYDROACETIC ACID [MI]Kyselina dehydroacetova [Czech]DEHYDROACETIC ACID [FCC]DEHYDROACETIC ACID [HSDB]HMS2267L15DEHYDROACETIC ACID [MART.]SMSSF-0055811

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External database identifiers

ChEMBL:CHEMBL1724669
ChEMBL:CHEMBL3306255
EPA DTXSID:DTXSID20892343
EPA DTXSID:DTXSID60892342
EPA DTXSID:DTXSID70874033
EPA DTXSID:DTXSID801015814
PubMed:23059992
PubMed:23044217
PubMed:22970574
PubMed:22648813
PubMed:22589975
PubMed:22394145
PubMed:22268355
PubMed:22199528
PubMed:22077436
PubMed:21579818
PubMed:21577732
PubMed:21381401

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for DEHYDROACETIC ACID

INCI name

DEHYDROACETIC ACID

INN name

dehydroacetic acid

Description

3-Acetyl-6-methyl-2H-pyran-2,4(3H)-dione

Record provenance

Inventory reference: 33185
Imported identity: DEHYDROACETIC ACID
Source update: 11/08/2020

European Commission CosIng source notes

Annex records for DEHYDROACETIC ACID

Annex V Restriction reference

Entry 13

Dehydroacetic acid / SODIUM DEHYDROACETATE

CAS: 520-45-6 / 4418-26-2 / 16807-48-0

EC: 208-293-9 / 224-580-1 / -

Key data

CAS

520-45-6 / 771-03-9 / 16807-48-0

208-293-9 / 212-227-4 / -

Restriction

V/13

Function

PRESERVATIVE: Exclusively or mainly intended to inhibit the development of micro-organisms in the cosmetic product. All authorised preservatives are substances in the positive list of Annex V to the Cosmetics Regulation 1223/2009.

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#8294 · DEHYDROACETIC ACID

Ingredients with overlapping formulation functions

CHLORPHENESINANTIMICROBIAL, PRESERVATIVE

CLIMBAZOLEANTI-SEBORRHEIC, ANTIMICROBIAL, PRESERVATIVE

COCOALKONIUM CHLORIDEANTISTATIC, HAIR CONDITIONING, PRESERVATIVE

COCOTRIMONIUM CHLORIDEANTIMICROBIAL, ANTISTATIC, PRESERVATIVE, SURFACTANT - CLEANSING

DIAZOLIDINYL UREAPRESERVATIVE

DIBROMOHEXAMIDINE ISETHIONATEPRESERVATIVE

DICHLOROBENZYL ALCOHOLANTIMICROBIAL, PRESERVATIVE

DIMETHYL OXAZOLIDINEPRESERVATIVE

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal

How DEHYDROACETIC ACID appears in the CosIng inventory

The CosIng inventory lists DEHYDROACETIC ACID as a cosmetic ingredient and this page links it to 1 annex record. The inventory entry captures names and identifiers, while the annex record shows where the substance is prohibited, restricted or positively listed in EU cosmetics law.

DEHYDROACETIC ACID is also tagged with 1 cosmetic function 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

DEHYDROACETIC ACID 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 DEHYDROACETIC ACID reads: "V/13". 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, DEHYDROACETIC ACID carries the following function designation(s):

PRESERVATIVE

CAS 520-45-6 / 771-03-9 / 16807-48-0 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.

Use the INCI Checker to screen a full ingredient list across selected markets, or compare this substance across all supported market datasets.

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Source note for DEHYDROACETIC ACID

This page combines the CosIng inventory entry for DEHYDROACETIC ACID with 1 linked Annex II–VI record from the local dataset built from public European Commission cosmetic ingredient materials.

Use this inventory page to research DEHYDROACETIC ACID 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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