Compoatlas

DIMETHYL OXAZOLIDINE (4,4-dimethyloxazolidine)

Official label name (INCI name, EU glossary of cosmetic ingredient names), No 8989

DIMETHYL OXAZOLIDINE (4,4-dimethyloxazolidine): Preservative allowed under conditions, maximum 0.1% in the ready-for-use preparation (Annex V, entry 45), under Regulation (EC) No 1223/2009.

In plain words

What it is used for

Functions declared by manufacturers:

Preservative: inhibits primarily the development of micro-organisms in cosmetics.

What the rules say

An ingredient can be used as a preservative only if it appears on the list of Annex V. <function plain_language.<locals>.name at 0x7f7804e05440> is on it with a maximum concentration.

The text of the annexes

Preservative allowed under conditions

Entry
Annex V, No 45
Substance
4,4-Dimethyl-1,3-oxazolidine
Glossary names
DIMETHYL OXAZOLIDINE
CAS
51200-87-4
EC
257-048-2
Maximum concentration
0.1%
Other conditions
pH > 6
Dates in the act (10)
  • Entry into force on 11 January 2010
  • Application from 1 December 2010
    It shall apply from 11 July 2013, with the exception of: — Article 15(1) and (2) which shall apply from 1 December 2010, as well as Articles 14, 31 and 32 to the extent that they are necessary to apply Article 15(1) and (2); and — Article 16(3) second subparagraph, which shall apply from 11 January 2013.
  • Entry into force on 1 December 2010
  • Condition applicable from 11 January 2012
    As from 11 January 2012, by way of derogation from Directive 76/768/EEC, notification carried out in accordance with Article 13 of this Regulation shall be considered to comply with Article 7(3) and Article 7a(4) of that Directive
  • Application from 11 January 2013
    July 2013, with the exception of: — Article 15(1) and (2) which shall apply from 1 December 2010, as well as Articles 14, 31 and 32 to the extent that they are necessary to apply Article 15(1) and (2); and — Article 16(3) second subparagraph, which shall apply from 11 January 2013.
  • Entry into force on 11 January 2013
  • Application from 11 July 2013
    It shall apply from 11 July 2013, with the exception of: — Article 15(1) and (2) which shall apply from 1 December 2010, as well as Articles 14, 31 and 32 to the extent that they are necessary to apply Article 15(1) and (2); and — Article 16(3) second subparagraph, which shall appl
  • Entry into force on 11 July 2013
  • Placing on the market before 11 July 2013
    Article 39 Transitional provisions By way of derogation from Directive 76/768/EEC, cosmetic products which comply with this Regulation may be placed on the market before 11 July 2013.
  • Placing on the market from 11 July 2013
    As from 11 July 2013, a distributor who makes available in a Member State a cosmetic product already placed on the market in another Member State and translates, on his own initiative, any element of the labelling of that product in order to comply with national law, shall submit, by electronic means, the following info

Excerpts from the English text published in the Official Journal. A date may concern only some substances of the act: the excerpt says so.

Identity

CosIng identifier
33483
CAS (according to CosIng)
51200-87-4
EC (according to CosIng)
257-048-2
Declared functions
Preservative
Wikidata
Q16801494
PubChem
62010
ECHA InfoCard
100.051.845
InChIKey
GUQMDNQYMMRJPY-UHFFFAOYSA-N

Elsewhere in the world

Information on other jurisdictions. What is covered, and what is not yet.

United Kingdom (Great Britain)

  • Preservative allowed under conditions (Annex V)

Same entries as in the European Union. Conditions (concentrations, warnings) may differ: they are not compared here.

Switzerland

Regulation (EC) No 1223/2009 applies in Switzerland (Article 54 of the Ordinance on Foodstuffs and Utility Articles).

United States, federal rules

None of the integrated sections of the federal code (21 CFR 700.11 to 700.27 and 250.250) targets this name. The FDA does not publish a list of allowed ingredients.

Washington State (United States)

  • Prohibited: Dimethyl Oxazolidine

    libérateur n° 16, from 1 January 2027. Prohibited when intentionally added; a retailer in the state may sell existing stock until January 1, 2028.

South Korea

  • Restricted: 4,4-디메칠-1,3-옥사졸리딘(디메칠옥사졸리딘) (DIMETHYL OXAZOLIDINE)

    별표 2, 보존제 성분 (preservatives), entry 3, page 1. Limit: 0.05% (다만, 제품의 pH는 6을 넘어야 함).

Brazil

  • Allowed under conditions: 4,4-Dimetil-1,3-oxazolidina (DIMETHYL OXAZOLIDINE)

    RDC 528/2021, Anexo (allowed preservatives), entry 40, page 4. Limit: 0,1%. Conditions (source text, in Portuguese): LIMITAÇÕES: Proibido em produtos com pH igual ou inferior a 6.

Recorded cosmetics that contain it

1 recorded product list it, according to Open Beauty Facts contributors. Records are dated: the formula may have changed. See the list (page in French).

Glossary: Commission Implementing Decision (EU) 2025/1175. Page updated on 21 October 2026.