ACID YELLOW 23
ACID YELLOW 23 is a cosmetic ingredient classified as Hair Dyeing. Also known as CAS 1934-21-0. It is regulated in 17 markets including UAE, Bahrain, Brazil.
Also Known As
- CAS Number
- 12225-21-7, 1934-21-0
- Color Index
- CI 19140
Market Overview — 29 Markets
Detailed Regulations
Europe4 regulations
- Chemical name
- Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-(4-sulphophenylazo)pyrazole-3-carboxylate and aluminium lake (see note 17). CI 19140
- CAS
- 1934-21-0 - 12225-21-7
- Max concentration
- 0.5%
- Product type
- Hair dye substance in non-oxidative hair dye products
Source: EC 1223/2009 Annex III
- Chemical name
- Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-((4-sulphophenyl)azo)pyrazole-3-carboxylate and its insoluble barium, strontium and zirconium lakes, salts and pigments
- CAS
- 12225-21-7; 1934-21-0
- Conditions of use
- Purity criteria as set out in Commission Directive 95/45/EC (E 102)
- Color Index
- CI 19140
Source: EC 1223/2009 Annex IV
- Chemical name
- Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-(4-sulphophenylazo)pyrazole-3-carboxylate and aluminium lake ; (CI 19140)
- CAS
- 1934-21-0 / 12225-21-7
- Max concentration
- 0,5 %
- Product type
- Hair dye substance in non-oxidative hair dye products
- Conditions of use
- Max: 0,5 %
Source: UK retained EC 1223/2009 Annex III
- Chemical name
- Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-((4-sulphophenyl)azo)pyrazole-3-carboxylate and its insoluble barium, strontium and zirconium lakes, salts and pigments
- Other conditions
- Purity criteria as set out in Commission Directive 95/45/EC (E 102)
- Color Index
- 19140
Source: UK retained EC 1223/2009 Annex IV
Americas1 regulation
- Product type
- products_in_general
- Conditions of use
- Application fields: products_in_general
- Color Index
- CI 19140
Source: ANVISA RDC 628
East Asia & Oceania2 regulations
- Chemical name
- Tartrazine, , FD&C Yellow No. 5, Acid Yellow 23 Aluminum Lake, Yellow 5 Lake, Ki4, FOOD YELLOW 4, CI 19140
- CAS
- 1934-21-0
Source: MFDS Korea Cosmetics Regulation
- Chemical name
- Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-(4-sulphophenylazo)pyrazole-3-carboxylate and aluminium lake (CI 19140)
- CAS
- 1934-21-0/ 12225-21-7
- Max concentration
- 0.5%
- Product type
- Non-oxidative hair dye products
Source: TFDA Cosmetics Regulations
ASEAN6 regulations
- Chemical name
- Trisodium 5-hydroxy-1-(4- sulphophenyl)-4-(4- sulphophenylazo)pyrazole-3- carboxylate and aluminium lake Acid Yellow 23 / Acid Yellow 23 Aluminium lake
- CAS
- 1934-21-0
- Max concentration
- 0.5%
- Product type
- Hair dye substance in non- oxidative hair dye products Use for dyeing eyelashes and eyebrows is not permitted.
- Conditions of use
- The free base and salts of this hair colouring ingredient, unless prohibited under Annex II, are permitted for use. The direction for use 'wear suitable gloves' must be included in label or leaflet text. | Label: Do not use to dye eyelashes or eyebrows
Source: ASEAN Cosmetic Directive (HSA Dec 2025)
- Chemical name
- Trisodium 5-hydroxy-1-(4- sulphophenyl)-4-(4- sulphophenylazo)pyrazole-3- carboxylate and aluminium lake Acid Yellow 23 / Acid Yellow 23 Aluminium lake
- CAS
- 1934-21-0
- Max concentration
- 0.5%
- Product type
- Hair dye substance in non- oxidative hair dye products Use for dyeing eyelashes and eyebrows is not permitted.
- Conditions of use
- The free base and salts of this hair colouring ingredient, unless prohibited under Annex II, are permitted for use. The direction for use 'wear suitable gloves' must be included in label or leaflet text. | Label: Do not use to dye eyelashes or eyebrows
Source: ASEAN Cosmetic Directive (HSA Dec 2025)
- Chemical name
- Trisodium 5-hydroxy-1-(4- sulphophenyl)-4-(4- sulphophenylazo)pyrazole-3- carboxylate and aluminium lake Acid Yellow 23 / Acid Yellow 23 Aluminium lake
- CAS
- 1934-21-0
- Max concentration
- 0.5%
- Product type
- Hair dye substance in non- oxidative hair dye products Use for dyeing eyelashes and eyebrows is not permitted.
- Conditions of use
- The free base and salts of this hair colouring ingredient, unless prohibited under Annex II, are permitted for use. The direction for use 'wear suitable gloves' must be included in label or leaflet text. | Label: Do not use to dye eyelashes or eyebrows
Source: ASEAN Cosmetic Directive (HSA Dec 2025)
- Chemical name
- Trisodium 5-hydroxy-1-(4- sulphophenyl)-4-(4- sulphophenylazo)pyrazole-3- carboxylate and aluminium lake Acid Yellow 23 / Acid Yellow 23 Aluminium lake
- CAS
- 1934-21-0
- Max concentration
- 0.5%
- Product type
- Hair dye substance in non- oxidative hair dye products Use for dyeing eyelashes and eyebrows is not permitted.
- Conditions of use
- The free base and salts of this hair colouring ingredient, unless prohibited under Annex II, are permitted for use. The direction for use 'wear suitable gloves' must be included in label or leaflet text. | Label: Do not use to dye eyelashes or eyebrows
Source: ASEAN Cosmetic Directive (HSA Dec 2025)
- Chemical name
- Trisodium 5-hydroxy-1-(4- sulphophenyl)-4-(4- sulphophenylazo)pyrazole-3- carboxylate and aluminium lake Acid Yellow 23 / Acid Yellow 23 Aluminium lake
- CAS
- 1934-21-0
- Max concentration
- 0.5%
- Product type
- Hair dye substance in non- oxidative hair dye products Use for dyeing eyelashes and eyebrows is not permitted.
- Conditions of use
- The free base and salts of this hair colouring ingredient, unless prohibited under Annex II, are permitted for use. The direction for use 'wear suitable gloves' must be included in label or leaflet text. | Label: Do not use to dye eyelashes or eyebrows
Source: ASEAN Cosmetic Directive (HSA Dec 2025)
- Chemical name
- Trisodium 5-hydroxy-1-(4- sulphophenyl)-4-(4- sulphophenylazo)pyrazole-3- carboxylate and aluminium lake Acid Yellow 23 / Acid Yellow 23 Aluminium lake
- CAS
- 1934-21-0
- Max concentration
- 0.5%
- Product type
- Hair dye substance in non- oxidative hair dye products Use for dyeing eyelashes and eyebrows is not permitted.
- Conditions of use
- The free base and salts of this hair colouring ingredient, unless prohibited under Annex II, are permitted for use. The direction for use 'wear suitable gloves' must be included in label or leaflet text. | Label: Do not use to dye eyelashes or eyebrows
Source: ASEAN Cosmetic Directive (HSA Dec 2025)
GCC12 regulations
- Chemical name
- Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-(4-sulphophenylazo)pyrazole-3-carboxylate and aluminium lake (see note 17). CI 19140
- CAS
- 1934-21-0 - 12225-21-7
- Max concentration
- 0.5%
- Product type
- Hair dye substance in non-oxidative hair dye products
Source: GSO 1943:2024 (based on EU 1223/2009 III)
- Chemical name
- Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-((4-sulphophenyl)azo)pyrazole-3-carboxylate and its insoluble barium, strontium and zirconium lakes, salts and pigments
- CAS
- 12225-21-7; 1934-21-0
- Conditions of use
- Purity criteria as set out in Commission Directive 95/45/EC (E 102)
- Color Index
- CI 19140
Source: GSO 1943:2024 (based on EU 1223/2009 IV)
- Chemical name
- Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-(4-sulphophenylazo)pyrazole-3-carboxylate and aluminium lake (see note 17). CI 19140
- CAS
- 1934-21-0 - 12225-21-7
- Max concentration
- 0.5%
- Product type
- Hair dye substance in non-oxidative hair dye products
Source: GSO 1943:2024 (based on EU 1223/2009 III)
- Chemical name
- Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-((4-sulphophenyl)azo)pyrazole-3-carboxylate and its insoluble barium, strontium and zirconium lakes, salts and pigments
- CAS
- 12225-21-7; 1934-21-0
- Conditions of use
- Purity criteria as set out in Commission Directive 95/45/EC (E 102)
- Color Index
- CI 19140
Source: GSO 1943:2024 (based on EU 1223/2009 IV)
- Chemical name
- Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-(4-sulphophenylazo)pyrazole-3-carboxylate and aluminium lake (see note 17). CI 19140
- CAS
- 1934-21-0 - 12225-21-7
- Max concentration
- 0.5%
- Product type
- Hair dye substance in non-oxidative hair dye products
Source: GSO 1943:2024 (based on EU 1223/2009 III)
- Chemical name
- Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-((4-sulphophenyl)azo)pyrazole-3-carboxylate and its insoluble barium, strontium and zirconium lakes, salts and pigments
- CAS
- 12225-21-7; 1934-21-0
- Conditions of use
- Purity criteria as set out in Commission Directive 95/45/EC (E 102)
- Color Index
- CI 19140
Source: GSO 1943:2024 (based on EU 1223/2009 IV)
- Chemical name
- Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-(4-sulphophenylazo)pyrazole-3-carboxylate and aluminium lake (see note 17). CI 19140
- CAS
- 1934-21-0 - 12225-21-7
- Max concentration
- 0.5%
- Product type
- Hair dye substance in non-oxidative hair dye products
Source: GSO 1943:2024 (based on EU 1223/2009 III)
- Chemical name
- Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-((4-sulphophenyl)azo)pyrazole-3-carboxylate and its insoluble barium, strontium and zirconium lakes, salts and pigments
- CAS
- 12225-21-7; 1934-21-0
- Conditions of use
- Purity criteria as set out in Commission Directive 95/45/EC (E 102)
- Color Index
- CI 19140
Source: GSO 1943:2024 (based on EU 1223/2009 IV)
- Chemical name
- Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-(4-sulphophenylazo)pyrazole-3-carboxylate and aluminium lake (see note 17). CI 19140
- CAS
- 1934-21-0 - 12225-21-7
- Max concentration
- 0.5%
- Product type
- Hair dye substance in non-oxidative hair dye products
Source: GSO 1943:2024 (based on EU 1223/2009 III)
- Chemical name
- Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-((4-sulphophenyl)azo)pyrazole-3-carboxylate and its insoluble barium, strontium and zirconium lakes, salts and pigments
- CAS
- 12225-21-7; 1934-21-0
- Conditions of use
- Purity criteria as set out in Commission Directive 95/45/EC (E 102)
- Color Index
- CI 19140
Source: GSO 1943:2024 (based on EU 1223/2009 IV)
- Chemical name
- Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-(4-sulphophenylazo)pyrazole-3-carboxylate and aluminium lake (see note 17). CI 19140
- CAS
- 1934-21-0 - 12225-21-7
- Max concentration
- 0.5%
- Product type
- Hair dye substance in non-oxidative hair dye products
Source: GSO 1943:2024 (based on EU 1223/2009 III)
- Chemical name
- Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-((4-sulphophenyl)azo)pyrazole-3-carboxylate and its insoluble barium, strontium and zirconium lakes, salts and pigments
- CAS
- 12225-21-7; 1934-21-0
- Conditions of use
- Purity criteria as set out in Commission Directive 95/45/EC (E 102)
- Color Index
- CI 19140
Source: GSO 1943:2024 (based on EU 1223/2009 IV)
EAEUNo restrictions
No specific restrictions for ACID YELLOW 23 in Russia, Belarus, Kazakhstan, Armenia, Kyrgyzstan.
Frequently Asked Questions
Is ACID YELLOW 23 banned in any country?
ACID YELLOW 23 is not banned in any of the 26 markets tracked by Formpli. However, it may be subject to restrictions or conditions of use in some markets.
What are the restrictions on ACID YELLOW 23 in cosmetics?
ACID YELLOW 23 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 ACID YELLOW 23 in cosmetics?
ACID YELLOW 23 is regulated in 17 markets. 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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Check Ingredients FreeThis 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.