DIAZOLIDINYL UREA

BannedCAS 78491-02-820 regulations across 19 markets

DIAZOLIDINYL UREA is a cosmetic ingredient classified as Preservative. Also known as CAS 78491-02-8. It is regulated in 19 markets including UAE, Bahrain, Brazil.

Also Known As

CAS Number
78491-02-8

Market Overview — 29 Markets

European Union1
United Kingdom1
United States
California
Maryland
Washington1
Canada
Brazil1
South Korea2
Japan1
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 #46
Chemical name
N-(Hydroxymethyl)-N-(dihydroxymethyl-1,3-dioxo-2,5-imidazolidinyl-4)-N'-(hydroxymethyl)urea
CAS
78491-02-8
Max concentration
0.5%

Source: EC 1223/2009 Annex V

United KingdomRestrictedAnnex V #46
Chemical name
N-(Hydroxymethyl)-N-(dihydroxymethyl-1,3-dioxo-2,5-imidazolidinyl-4)-N'-(hydroxymethyl) urea
CAS
78491-02-8
Max concentration
0,5 %
Conditions of use
Max: 0,5 %

Source: UK retained EC 1223/2009 Annex V

Americas2 regulations
WashingtonBannedAnnex HB1047_P2
Chemical name
Diazolidinyl Urea
CAS
78491-02-8
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 #41
Chemical name
N-(hidroximetil)-N- (dihidroximetil-1,3- dioxo-2,5-imidazoli dinil-4)-N’(hidroxim etil)urea
CAS
78491-02-8
Max concentration
0,5%

Source: ANVISA RDC 528

East Asia & Oceania4 regulations
South KoreaRestrictedAnnex restricted #M1347
Chemical name
Diazolidinyl Urea
Conditions of use
* 배합한도 : 0.50%

Source: MFDS Korea Cosmetics Regulation

South KoreaRestrictedAnnex restricted #M976
Chemical name
Diazolidinyl Urea
Conditions of use
* 배합한도 : 0.50%

Source: MFDS Korea Cosmetics Regulation

JapanRestrictedAnnex Appendix 3 (Preservatives) #3-2
Chemical name
Diazolidinyl Urea
Max concentration
0.30%
Product type
Rinse-off (cosmetics washed away after use)

Source: MHLW Standards for Cosmetics (Notification No.331 of 2000)

TaiwanRestrictedAnnex Preservatives List #53
Chemical name
N-(Hydroxymethyl)-N- (dihydroxymethyl-1,3-dioxo-2,5-imidazolidinyl-4)-N'-(hydroxymethyl) urea
CAS
78491-02-8
Max concentration
0.5 %
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) #46
Chemical name
N-(Hydroxymethyl)-N-(dihydroxymethyl-1,3- dioxo-2,5-imidazolinidyl-4)-N'-(hydroxymethyl) urea)
CAS
78491-02-8
Max concentration
0.5%

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

MalaysiaRestrictedAnnex ACD Annex VI (Preservatives) #46
Chemical name
N-(Hydroxymethyl)-N-(dihydroxymethyl-1,3- dioxo-2,5-imidazolinidyl-4)-N'-(hydroxymethyl) urea)
CAS
78491-02-8
Max concentration
0.5%

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

ThailandRestrictedAnnex ACD Annex VI (Preservatives) #46
Chemical name
N-(Hydroxymethyl)-N-(dihydroxymethyl-1,3- dioxo-2,5-imidazolinidyl-4)-N'-(hydroxymethyl) urea)
CAS
78491-02-8
Max concentration
0.5%

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

IndonesiaRestrictedAnnex ACD Annex VI (Preservatives) #46
Chemical name
N-(Hydroxymethyl)-N-(dihydroxymethyl-1,3- dioxo-2,5-imidazolinidyl-4)-N'-(hydroxymethyl) urea)
CAS
78491-02-8
Max concentration
0.5%

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

VietnamRestrictedAnnex ACD Annex VI (Preservatives) #46
Chemical name
N-(Hydroxymethyl)-N-(dihydroxymethyl-1,3- dioxo-2,5-imidazolinidyl-4)-N'-(hydroxymethyl) urea)
CAS
78491-02-8
Max concentration
0.5%

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

PhilippinesRestrictedAnnex ACD Annex VI (Preservatives) #46
Chemical name
N-(Hydroxymethyl)-N-(dihydroxymethyl-1,3- dioxo-2,5-imidazolinidyl-4)-N'-(hydroxymethyl) urea)
CAS
78491-02-8
Max concentration
0.5%

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

GCC6 regulations
UAERestrictedAnnex V #46
Chemical name
N-(Hydroxymethyl)-N-(dihydroxymethyl-1,3-dioxo-2,5-imidazolidinyl-4)-N'-(hydroxymethyl)urea
CAS
78491-02-8
Max concentration
0.5%

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

Saudi ArabiaRestrictedAnnex V #46
Chemical name
N-(Hydroxymethyl)-N-(dihydroxymethyl-1,3-dioxo-2,5-imidazolidinyl-4)-N'-(hydroxymethyl)urea
CAS
78491-02-8
Max concentration
0.5%

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

QatarRestrictedAnnex V #46
Chemical name
N-(Hydroxymethyl)-N-(dihydroxymethyl-1,3-dioxo-2,5-imidazolidinyl-4)-N'-(hydroxymethyl)urea
CAS
78491-02-8
Max concentration
0.5%

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

OmanRestrictedAnnex V #46
Chemical name
N-(Hydroxymethyl)-N-(dihydroxymethyl-1,3-dioxo-2,5-imidazolidinyl-4)-N'-(hydroxymethyl)urea
CAS
78491-02-8
Max concentration
0.5%

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

KuwaitRestrictedAnnex V #46
Chemical name
N-(Hydroxymethyl)-N-(dihydroxymethyl-1,3-dioxo-2,5-imidazolidinyl-4)-N'-(hydroxymethyl)urea
CAS
78491-02-8
Max concentration
0.5%

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

BahrainRestrictedAnnex V #46
Chemical name
N-(Hydroxymethyl)-N-(dihydroxymethyl-1,3-dioxo-2,5-imidazolidinyl-4)-N'-(hydroxymethyl)urea
CAS
78491-02-8
Max concentration
0.5%

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

EAEUNo restrictions

No specific restrictions for DIAZOLIDINYL UREA in Russia, Belarus, Kazakhstan, Armenia, Kyrgyzstan.

Frequently Asked Questions

Is DIAZOLIDINYL UREA banned in any country?

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

What are the restrictions on DIAZOLIDINYL UREA in cosmetics?

DIAZOLIDINYL UREA is restricted or has conditions of use in UAE, Bahrain, Brazil, European Union, Indonesia, Japan, 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 DIAZOLIDINYL UREA in cosmetics?

DIAZOLIDINYL UREA is regulated in 19 markets. It is banned in Washington. It has restrictions in UAE, Bahrain, Brazil, European Union, Indonesia, Japan, 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.