Official EU label nameGlossary entry 177
2,6-DIHYDROXY-3,4-DIMETHYLPYRIDINE
This record confirms an official common ingredient name for EU cosmetic product labelling. It does not by itself confirm that the substance is permitted, unrestricted or safe.
Global evidence snapshot
The resolved identity has matching regulatory evidence in 7 of 13 indexed market datasets: 6 country records and 1 EU Annex records. Every result and evidence gap is listed below.
Markets checked
13
Markets with evidence
7
Evidence gaps
6
Resolved identifiers
2
Resolved substance identity
CAS:84540-47-6
EC:283-141-2
Ingredient index records:
2,6-DIHYDROXY-3,4-DIMETHYLPYRIDINE
Cosmetic functions: HAIR DYEING
6-Hydroxy-3,4-dimethyl-2-pyridone
Inventory restriction note: III/218
7 matched or reported names
2,6-DIHYDROXY-3,4-DIMETHYLPYRIDINE6-Hydroxy-3,4- dimethyl-2-pyridone2,6-Dihydroxy-3,4-dimethylpyridine2,6-Dihydroxy-3,4-dimethylpyridine (6-hydroxy-3,4-dimethyl-2-pyridone)6-Hydroxy-3,4-dimethyl-2-pyridone 2,6-Dihydroxy-3,4-dimethylpyridine CAS No 84540-47-62,6-디하이드록시-3,4-디메칠피리딘 및그 염류6-Hydroxy-3,4-dimethyl-2- pyridone 2,6-Dihydroxy- 3,4- dimethylpyridine (CAS No. 84540-47-6)
Regulatory evidence in all 13 markets
Open each matched record for its scope, concentration, conditions, warnings and official source version.
Swipe or scroll horizontally to see dataset coverage and next actions.
| Market | Result | Records | Dataset | Meaning / next action |
|---|---|---|---|---|
| European Union EU | Restricted | 1Open record 1 | Complete annex dataset Regulation (EC) 1223/2009 consolidated to 1 May 2026 | Review every linked record and exact conditions. |
| Great Britain GB | Restricted | 1Open record 1 | Complete consolidated annex dataset GB retained Regulation 1223/2009 schedules, effective 15 August 2026 | Review every linked record and exact conditions. |
| Canada CA | No local match | 0 | Complete Hotlist snapshot Health Canada Cosmetic Ingredient Hotlist, 13 August 2025 | The Hotlist is an administrative compliance tool, not an exhaustive safety approval list. |
| New Zealand NZ | Restricted | 1Open record 1 | Complete schedules dataset Cosmetic Products Group Standard schedules effective 1 January 2026 | Review every linked record and exact conditions. |
| ASEAN ASEAN | Restricted | 1Open record 1 | Complete regional annex dataset ASEAN Cosmetic Directive annexes 2026-1, 22 June 2026 | Review every linked record and exact conditions. |
| China CN | No local match | 0 | Complete prohibited catalogues plus official-source workflow NMPA 2021 banned catalogues plus dynamic IECIC List I/List II system current since 2025 | IECIC listing is not blanket approval; absence may require the new cosmetic ingredient route, and restrictions are checked separately. |
| Japan JP | No local match | 0 | Complete Standards appendices dataset MHLW Standards for Cosmetics official English source and Japanese amendments checked for the imported snapshot | The Japanese text and subsequent notices are canonical; no local match is not a product-compliance conclusion. |
| South Korea KR | Prohibited | 1Open record 1 | Complete current appendix dataset MFDS Notice 2026-19, effective 18 March 2026 | Review every linked record and exact conditions. |
| United States US | No local match | 0 | Complete enumerated federal ingredient rules eCFR Title 21 issue date 27 August 2026 | FDA has no general approved-cosmetic-ingredient catalogue; absence from these sections is not approval or proof of safety. |
| Australia AU | No local match | 0 | Complete cosmetic-relevant Poisons Standard subset plus official workflow Therapeutic Goods (Poisons Standard—June 2026) Instrument 2026 | An AICIS Inventory match is not cosmetic approval; no Inventory match can indicate a new, exempted, reported or confidential introduction. |
| Brazil BR | No local match | 0 | Complete prohibited dataset plus current restricted-list workflow ANVISA RDC 1.029/2026 and RDC 1.030/2026, published 15 June 2026 | RDC 1.030/2026 amends rather than replaces the prohibited baseline, and the second restricted-list revision was still under consultation in July 2026. |
| India IN | Restricted | 1Open record 1 | Complete current Part 2 dataset plus official workflow for Parts 1, 3 and 4 Cosmetics Rules 2020 plus current BIS IS 4707 parts (1:2020, 2:2025, 3:2025, 4:2022) | Review every linked record and exact conditions. |
| Saudi Arabia SA | Restricted | 1Open record 1 | Complete official list index SFDA live prohibited/restricted lists, snapshot 30 August 2026 | Review every linked record and exact conditions. |
No market rows match this filter.
Matching market records and conditions
Great Britain
GB retained Regulation 1223/2009 schedules, effective 15 August 2026New Zealand
Cosmetic Products Group Standard schedules effective 1 January 2026ASEAN
ASEAN Cosmetic Directive annexes 2026-1, 22 June 2026South Korea
MFDS Notice 2026-19, effective 18 March 2026India
Cosmetics Rules 2020 plus current BIS IS 4707 parts (1:2020, 2:2025, 3:2025, 4:2022)Saudi Arabia
SFDA live prohibited/restricted lists, snapshot 30 August 2026Exact Annex II–VI evidence
Annex IIIentry 218
Open full regulatory record2,6-DIHYDROXY-3,4-DIMETHYLPYRIDINE
Product scope: Hair dye substance in oxidative hair dye products
Restrictions: After mixing under oxidative conditions the maximum concentration applied to hair must not exceed 1,0 %
Warnings: To be printed on the label: The mixing ratio. “ Hair colourants can cause severe allergic reactions. Read and follow instructions. This product is not intended for use on persons under the age of 16. Temporary ‘black henna’ tattoos may increase your risk of allergy. Do not colour your hair if: — yo…
Chemical identity and properties
CAS 84540-47-6PubChem CID 10313171
2,6-Dihydroxy-3,4-dimethylpyridine
- IUPAC name
- 6-hydroxy-4,5-dimethyl-1H-pyridin-2-one
- Molecular formula
- C7H9NO2
- Molecular weight
- 139.15 g/mol
- Exact mass
- 139.063328530 Da
- XLogP3
- -0.1
- Topological polar surface area
- 49.3 Ų
- Hydrogen-bond donors
- 2
- Hydrogen-bond acceptors
- 2
- Covalent units
- 1
- Defined stereocentres
- 0
Also known as
UNII-3VDO3A5MTW3VDO3A5MTWEINECS 283-141-22(1H)-PYRIDINONE, 6-HYDROXY-4,5-DIMETHYL-RefChem:832442,6-DIHYDROXY-3,4-DIMETHYLPYRIDINE [INCI]283-141-26-Hydroxy-3,4-dimethyl-2-pyridone
7 more reported names
6-Hydroxy-4,5-dimethylpyridin-2(1H)-oneKIEGFAYDOKCBOK-UHFFFAOYSA-NAC-8296AS-132106-Hydroxy-3,4-dimethylpyridin-2(1H)-oneDB-020211CS-0091193
External database identifiers
- ChEMBL:CHEMBL3086520
- EPA DTXSID:DTXSID50233528
Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.
Additional authoritative substance research
Each link searches that source for this identity. A link is a research route, not a claim that the source holds an exact record. What each source is, and its legal weight
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Official source and scope
Imported from Commission Implementing Decision (EU) 2025/1175 (dataset version EU 2025/1175). The glossary supplies common ingredient names for the ingredient list required by Article 19(1)(g); it is not an approval or safety list.
Open official Decision