DIMETHYL OXAZOLIDINE

BannedCAS 51200-87-419 regulations across 18 markets

DIMETHYL OXAZOLIDINE is a cosmetic ingredient classified as Preservative. Also known as CAS 51200-87-4. It is regulated in 18 markets including UAE, Bahrain, Brazil.

Also Known As

CAS Number
51200-87-4

Market Overview — 29 Markets

European Union1
United Kingdom1
United States
California
Maryland
Washington1
Canada
Brazil1
South Korea2
Japan
Taiwan1
Australia
Singapore1
Malaysia1
Thailand1
Indonesia1
Vietnam1
Philippines1
UAE1
Saudi Arabia1
Qatar1
Oman1
Kuwait1
Bahrain1
Russia
Belarus
Kazakhstan
Armenia
Kyrgyzstan

Detailed Regulations

Europe2 regulations
European UnionRestrictedAnnex V #45
Chemical name
4,4-Dimethyl-1,3-oxazolidine
CAS
51200-87-4
Max concentration
0.1%
Other conditions
pH > 6

Source: EC 1223/2009 Annex V

United KingdomRestrictedAnnex V #45
Chemical name
4,4-Dimethyl-1,3-oxazolidine
CAS
51200-87-4
Max concentration
0,1 %
Conditions of use
Max: 0,1 %
Other conditions
pH > 6

Source: UK retained EC 1223/2009 Annex V

Americas2 regulations
WashingtonBannedAnnex HB1047_P2
Chemical name
Dimethyl Oxazolidine
CAS
51200-87-4
Conditions of use
Banned effective 2027-01-01 (HB 1047 Phase 2 - formaldehyde releasers)

Source: WA HB 1047 (Toxic-Free Cosmetics Act)

BrazilRestrictedAnnex RDC_528 #40
Chemical name
4,4-Dimetil-1,3-oxa zolidina
CAS
51200-87-4
Max concentration
0,1%
Conditions of use
Limitations: Proibido em produtos com pH igual ou inferior a 6.

Source: ANVISA RDC 528

East Asia & Oceania3 regulations
South KoreaRestrictedAnnex restricted #M888
Chemical name
Dimethyl Oxazolidine
Conditions of use
* 배합한도 : 0.05% (다만, 제품의 pH는 6을 넘어야 함)

Source: MFDS Korea Cosmetics Regulation

South KoreaRestrictedAnnex restricted #M990
Chemical name
Dimethyl Oxazolidine
Conditions of use
* 배합한도 : 0.05% (다만, 제품의 pH는 6을 넘어야 함)

Source: MFDS Korea Cosmetics Regulation

TaiwanRestrictedAnnex Preservatives List #16
Chemical name
4,4-Dimethyl-1,3-oxazolidine
CAS
51200-87-4
Max concentration
0.1 %
Conditions of use
pH>6

Source: TFDA Cosmetics Regulations

ASEAN6 regulations
SingaporeRestrictedAnnex ACD Annex VI (Preservatives) #45
Chemical name
4,4-Dimethyl-1,3-oxazolidine
CAS
51200-87-4
Max concentration
0.1%
Conditions of use
The pH of the finished product must not be lower than 6

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

MalaysiaRestrictedAnnex ACD Annex VI (Preservatives) #45
Chemical name
4,4-Dimethyl-1,3-oxazolidine
CAS
51200-87-4
Max concentration
0.1%
Conditions of use
The pH of the finished product must not be lower than 6

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

ThailandRestrictedAnnex ACD Annex VI (Preservatives) #45
Chemical name
4,4-Dimethyl-1,3-oxazolidine
CAS
51200-87-4
Max concentration
0.1%
Conditions of use
The pH of the finished product must not be lower than 6

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

IndonesiaRestrictedAnnex ACD Annex VI (Preservatives) #45
Chemical name
4,4-Dimethyl-1,3-oxazolidine
CAS
51200-87-4
Max concentration
0.1%
Conditions of use
The pH of the finished product must not be lower than 6

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

VietnamRestrictedAnnex ACD Annex VI (Preservatives) #45
Chemical name
4,4-Dimethyl-1,3-oxazolidine
CAS
51200-87-4
Max concentration
0.1%
Conditions of use
The pH of the finished product must not be lower than 6

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

PhilippinesRestrictedAnnex ACD Annex VI (Preservatives) #45
Chemical name
4,4-Dimethyl-1,3-oxazolidine
CAS
51200-87-4
Max concentration
0.1%
Conditions of use
The pH of the finished product must not be lower than 6

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

GCC6 regulations
UAERestrictedAnnex V #45
Chemical name
4,4-Dimethyl-1,3-oxazolidine
CAS
51200-87-4
Max concentration
0.1%
Other conditions
pH > 6

Source: GSO 1943:2024 (based on EU 1223/2009 V)

Saudi ArabiaRestrictedAnnex V #45
Chemical name
4,4-Dimethyl-1,3-oxazolidine
CAS
51200-87-4
Max concentration
0.1%
Other conditions
pH > 6

Source: GSO 1943:2024 (based on EU 1223/2009 V)

QatarRestrictedAnnex V #45
Chemical name
4,4-Dimethyl-1,3-oxazolidine
CAS
51200-87-4
Max concentration
0.1%
Other conditions
pH > 6

Source: GSO 1943:2024 (based on EU 1223/2009 V)

OmanRestrictedAnnex V #45
Chemical name
4,4-Dimethyl-1,3-oxazolidine
CAS
51200-87-4
Max concentration
0.1%
Other conditions
pH > 6

Source: GSO 1943:2024 (based on EU 1223/2009 V)

KuwaitRestrictedAnnex V #45
Chemical name
4,4-Dimethyl-1,3-oxazolidine
CAS
51200-87-4
Max concentration
0.1%
Other conditions
pH > 6

Source: GSO 1943:2024 (based on EU 1223/2009 V)

BahrainRestrictedAnnex V #45
Chemical name
4,4-Dimethyl-1,3-oxazolidine
CAS
51200-87-4
Max concentration
0.1%
Other conditions
pH > 6

Source: GSO 1943:2024 (based on EU 1223/2009 V)

EAEUNo restrictions

No specific restrictions for DIMETHYL OXAZOLIDINE in Russia, Belarus, Kazakhstan, Armenia, Kyrgyzstan.

Frequently Asked Questions

Is DIMETHYL OXAZOLIDINE banned in any country?

Yes, DIMETHYL OXAZOLIDINE is banned in Washington. Always check current regulations before formulating products for these markets.

What are the restrictions on DIMETHYL OXAZOLIDINE in cosmetics?

DIMETHYL OXAZOLIDINE is restricted or has conditions of use in UAE, Bahrain, Brazil, European Union, Indonesia, South Korea, Kuwait, Malaysia, Oman, Philippines, Qatar, Saudi Arabia, Singapore, Thailand, Taiwan, United Kingdom, Vietnam. Restrictions may include maximum concentration limits, product type limitations, or mandatory labeling requirements. See the detailed regulations above for specifics.

Can I use DIMETHYL OXAZOLIDINE in cosmetics?

DIMETHYL OXAZOLIDINE is regulated in 18 markets. It is banned in Washington. It has restrictions in UAE, Bahrain, Brazil, European Union, Indonesia, South Korea, Kuwait, Malaysia, Oman, Philippines, Qatar, Saudi Arabia, Singapore, Thailand, Taiwan, United Kingdom, Vietnam. Use Formpli's free screening tool to check your full ingredient list against all 26 markets at once.

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This information is for reference only and does not constitute legal or regulatory advice. Regulations change — always verify with official sources and consult a regulatory specialist before exporting cosmetic products. Data sourced from EU COSING, US FDA, Health Canada, MHLW Japan, MFDS Korea, ASEAN ACD, GCC SFDA, TGA Australia, ANVISA Brazil, EAEU TR CU, and Taiwan TFDA.