IMIDAZOLIDINYL UREA

BannedCAS 39236-46-923 regulations across 23 markets

IMIDAZOLIDINYL UREA is a cosmetic ingredient classified as Preservative. Also known as CAS 39236-46-9. It is regulated in 23 markets including UAE, Armenia, Bahrain.

Also Known As

CAS Number
39236-46-9

Market Overview — 29 Markets

European Union1
United Kingdom1
United States
California
Maryland
Washington1
Canada
Brazil1
South Korea1
Japan
Taiwan1
Australia
Singapore1
Malaysia1
Thailand1
Indonesia1
Vietnam1
Philippines1
UAE1
Saudi Arabia1
Qatar1
Oman1
Kuwait1
Bahrain1
Russia1
Belarus1
Kazakhstan1
Armenia1
Kyrgyzstan1

Detailed Regulations

Europe2 regulations
European UnionRestrictedAnnex V #27
Chemical name
N,N''-Methylenebis[N'-[3-(hydroxymethyl)-2,5-dioxoimidazolidin-4-yl]urea]
CAS
39236-46-9
Max concentration
0.6%

Source: EC 1223/2009 Annex V

United KingdomRestrictedAnnex V #27
Chemical name
N,N″-methylenebis[N′-[3-(hydroxymethyl)-2,5-dioxoimidazolidin-4-yl]urea]
CAS
39236-46-9
Max concentration
0,6 %
Conditions of use
Max: 0,6 %

Source: UK retained EC 1223/2009 Annex V

Americas2 regulations
WashingtonBannedAnnex HB1047_P2
Chemical name
Imidazolidinyl Urea
CAS
39236-46-9
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 #24
Chemical name
Imidazolidinil urea
CAS
39236-46-9
Max concentration
0,6%

Source: ANVISA RDC 528

East Asia & Oceania2 regulations
South KoreaRestrictedAnnex restricted #M1366
Chemical name
Imidazolidinyl Urea
Conditions of use
* 배합한도 : 0.60%

Source: MFDS Korea Cosmetics Regulation

TaiwanRestrictedAnnex Preservatives List #54
Chemical name
N,N''-methylenebis[N'-[3- (hydroxymethyl)-2,5-dioxoimidazolidin-4-yl]urea]
CAS
39236-46-9
Max concentration
0.6 %
Conditions of use
When used as preservatives in cosmetic products, the total amount of released free formaldehyde should not exceed 1000 ppm

Source: TFDA Cosmetics Regulations

ASEAN6 regulations
SingaporeRestrictedAnnex ACD Annex VI (Preservatives) #27
Chemical name
3,3'-Bis(1-hydroxymethyl-2,5-dioxoimidazolidin- 4-yl)-1,1'-methylenediurea (' / Imidazolidinyl urea')
CAS
39236-46-9
Max concentration
0.6%

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

MalaysiaRestrictedAnnex ACD Annex VI (Preservatives) #27
Chemical name
3,3'-Bis(1-hydroxymethyl-2,5-dioxoimidazolidin- 4-yl)-1,1'-methylenediurea (' / Imidazolidinyl urea')
CAS
39236-46-9
Max concentration
0.6%

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

ThailandRestrictedAnnex ACD Annex VI (Preservatives) #27
Chemical name
3,3'-Bis(1-hydroxymethyl-2,5-dioxoimidazolidin- 4-yl)-1,1'-methylenediurea (' / Imidazolidinyl urea')
CAS
39236-46-9
Max concentration
0.6%

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

IndonesiaRestrictedAnnex ACD Annex VI (Preservatives) #27
Chemical name
3,3'-Bis(1-hydroxymethyl-2,5-dioxoimidazolidin- 4-yl)-1,1'-methylenediurea (' / Imidazolidinyl urea')
CAS
39236-46-9
Max concentration
0.6%

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

VietnamRestrictedAnnex ACD Annex VI (Preservatives) #27
Chemical name
3,3'-Bis(1-hydroxymethyl-2,5-dioxoimidazolidin- 4-yl)-1,1'-methylenediurea (' / Imidazolidinyl urea')
CAS
39236-46-9
Max concentration
0.6%

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

PhilippinesRestrictedAnnex ACD Annex VI (Preservatives) #27
Chemical name
3,3'-Bis(1-hydroxymethyl-2,5-dioxoimidazolidin- 4-yl)-1,1'-methylenediurea (' / Imidazolidinyl urea')
CAS
39236-46-9
Max concentration
0.6%

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

GCC6 regulations
UAERestrictedAnnex V #27
Chemical name
N,N''-Methylenebis[N'-[3-(hydroxymethyl)-2,5-dioxoimidazolidin-4-yl]urea]
CAS
39236-46-9
Max concentration
0.6%

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

Saudi ArabiaRestrictedAnnex V #27
Chemical name
N,N''-Methylenebis[N'-[3-(hydroxymethyl)-2,5-dioxoimidazolidin-4-yl]urea]
CAS
39236-46-9
Max concentration
0.6%

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

QatarRestrictedAnnex V #27
Chemical name
N,N''-Methylenebis[N'-[3-(hydroxymethyl)-2,5-dioxoimidazolidin-4-yl]urea]
CAS
39236-46-9
Max concentration
0.6%

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

OmanRestrictedAnnex V #27
Chemical name
N,N''-Methylenebis[N'-[3-(hydroxymethyl)-2,5-dioxoimidazolidin-4-yl]urea]
CAS
39236-46-9
Max concentration
0.6%

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

KuwaitRestrictedAnnex V #27
Chemical name
N,N''-Methylenebis[N'-[3-(hydroxymethyl)-2,5-dioxoimidazolidin-4-yl]urea]
CAS
39236-46-9
Max concentration
0.6%

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

BahrainRestrictedAnnex V #27
Chemical name
N,N''-Methylenebis[N'-[3-(hydroxymethyl)-2,5-dioxoimidazolidin-4-yl]urea]
CAS
39236-46-9
Max concentration
0.6%

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

EAEU5 regulations
RussiaRestrictedAnnex 4 #27
Chemical name
N,N"-метилен-бис[N'-[3-гидроксиметил-2,5-диоксоимидазолидин-4-ил]мочевина N,N'-methylen-ebis[N'-[3-hydroxymethyl-2,5-dioxoimidazolidin-4-yl]urea]
CAS
39236-46-9
Max concentration
0,6 процента

Source: TR CU 009/2011 Annex 4 (Preservatives) (Ref 27)

BelarusRestrictedAnnex 4 #27
Chemical name
N,N"-метилен-бис[N'-[3-гидроксиметил-2,5-диоксоимидазолидин-4-ил]мочевина N,N'-methylen-ebis[N'-[3-hydroxymethyl-2,5-dioxoimidazolidin-4-yl]urea]
CAS
39236-46-9
Max concentration
0,6 процента

Source: TR CU 009/2011 Annex 4 (Preservatives) (Ref 27)

KazakhstanRestrictedAnnex 4 #27
Chemical name
N,N"-метилен-бис[N'-[3-гидроксиметил-2,5-диоксоимидазолидин-4-ил]мочевина N,N'-methylen-ebis[N'-[3-hydroxymethyl-2,5-dioxoimidazolidin-4-yl]urea]
CAS
39236-46-9
Max concentration
0,6 процента

Source: TR CU 009/2011 Annex 4 (Preservatives) (Ref 27)

ArmeniaRestrictedAnnex 4 #27
Chemical name
N,N"-метилен-бис[N'-[3-гидроксиметил-2,5-диоксоимидазолидин-4-ил]мочевина N,N'-methylen-ebis[N'-[3-hydroxymethyl-2,5-dioxoimidazolidin-4-yl]urea]
CAS
39236-46-9
Max concentration
0,6 процента

Source: TR CU 009/2011 Annex 4 (Preservatives) (Ref 27)

KyrgyzstanRestrictedAnnex 4 #27
Chemical name
N,N"-метилен-бис[N'-[3-гидроксиметил-2,5-диоксоимидазолидин-4-ил]мочевина N,N'-methylen-ebis[N'-[3-hydroxymethyl-2,5-dioxoimidazolidin-4-yl]urea]
CAS
39236-46-9
Max concentration
0,6 процента

Source: TR CU 009/2011 Annex 4 (Preservatives) (Ref 27)

Frequently Asked Questions

Is IMIDAZOLIDINYL UREA banned in any country?

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

What are the restrictions on IMIDAZOLIDINYL UREA in cosmetics?

IMIDAZOLIDINYL UREA is restricted or has conditions of use in UAE, Armenia, Bahrain, Brazil, Belarus, European Union, Indonesia, Kyrgyzstan, South Korea, Kuwait, Kazakhstan, Malaysia, Oman, Philippines, Qatar, Russia, 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 IMIDAZOLIDINYL UREA in cosmetics?

IMIDAZOLIDINYL UREA is regulated in 23 markets. It is banned in Washington. It has restrictions in UAE, Armenia, Bahrain, Brazil, Belarus, European Union, Indonesia, Kyrgyzstan, South Korea, Kuwait, Kazakhstan, Malaysia, Oman, Philippines, Qatar, Russia, 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.