ETIDRONIC ACID
ETIDRONIC ACID is a cosmetic ingredient classified as Chelating. Also known as CAS 2809-21-4. It is regulated in 15 markets including UAE, Bahrain, European Union.
Also Known As
- CAS Number
- 2809-21-4
Market Overview — 29 Markets
Detailed Regulations
Europe3 regulations
- Chemical name
- (1-Hydroxyethylidene)diphosphonic acid and its salts
- CAS
- 2809-21-4
- Max concentration
- (a) 1.5% (as etidronic acid) (b) 0.2% (as etidronic acid)
- Product type
- (a) Hair product (b) Soap
Source: EC 1223/2009 Annex III
- Chemical name
- (1-Hydroxyethylidene-diphosphonic acid) and its salts
- CAS
- 2809-21-4
- Max concentration
- 1,5 % (as etidronic acid)
- Product type
- (a)Hair- product
- Conditions of use
- Max: 1,5 % (as etidronic acid)
Source: UK retained EC 1223/2009 Annex III
- Chemical name
- (1-Hydroxyethylidene-diphosphonic acid) and its salts
- CAS
- 2809-21-4
- Max concentration
- 0,2 % (as etidronic acid)
- Product type
- (b)Soap
- Conditions of use
- Max: 0,2 % (as etidronic acid)
Source: UK retained EC 1223/2009 Annex III
AmericasNo restrictions
No specific restrictions for ETIDRONIC ACID in United States, California, Maryland, Washington, Canada, Brazil.
East Asia & Oceania2 regulations
- Chemical name
- Etidronic Acid
- Conditions of use
- * 배합한도 : ∙ 두발용 제품류 및 두발염색용 제품류에 산으로서 1.5% ∙ 인체 세정용 제품류에 산으로서 0.2% ∙ 기타 제품에는 사용금지
Source: MFDS Korea Cosmetics Regulation
- Chemical name
- Etidronic acid and its salts (1-hydroxyethylidene- di-phosphonic acid and its salts)
- CAS
- 2809-21-4
- Conditions of use
- * 배합한도 : ∙ 두발용 제품류 및 두발염색용 제품류에 산으로서 1.5% ∙ 인체 세정용 제품류에 산으로서 0.2% ∙ 기타 제품에는 사용금지
Source: MFDS Korea Cosmetics Regulation
ASEAN6 regulations
- Chemical name
- (1-Hydroxyethylidene) di-phosphonic acid and its salts / Etidronic acid and its salts
- CAS
- 2809-21-4
- Max concentration
- (a) 1.5% expressed as etidronic acid (b) 0.2% expressed as etidronic acid
- Product type
- (a) Hair care products (b) Soap
Source: ASEAN Cosmetic Directive (HSA Dec 2025)
- Chemical name
- (1-Hydroxyethylidene) di-phosphonic acid and its salts / Etidronic acid and its salts
- CAS
- 2809-21-4
- Max concentration
- (a) 1.5% expressed as etidronic acid (b) 0.2% expressed as etidronic acid
- Product type
- (a) Hair care products (b) Soap
Source: ASEAN Cosmetic Directive (HSA Dec 2025)
- Chemical name
- (1-Hydroxyethylidene) di-phosphonic acid and its salts / Etidronic acid and its salts
- CAS
- 2809-21-4
- Max concentration
- (a) 1.5% expressed as etidronic acid (b) 0.2% expressed as etidronic acid
- Product type
- (a) Hair care products (b) Soap
Source: ASEAN Cosmetic Directive (HSA Dec 2025)
- Chemical name
- (1-Hydroxyethylidene) di-phosphonic acid and its salts / Etidronic acid and its salts
- CAS
- 2809-21-4
- Max concentration
- (a) 1.5% expressed as etidronic acid (b) 0.2% expressed as etidronic acid
- Product type
- (a) Hair care products (b) Soap
Source: ASEAN Cosmetic Directive (HSA Dec 2025)
- Chemical name
- (1-Hydroxyethylidene) di-phosphonic acid and its salts / Etidronic acid and its salts
- CAS
- 2809-21-4
- Max concentration
- (a) 1.5% expressed as etidronic acid (b) 0.2% expressed as etidronic acid
- Product type
- (a) Hair care products (b) Soap
Source: ASEAN Cosmetic Directive (HSA Dec 2025)
- Chemical name
- (1-Hydroxyethylidene) di-phosphonic acid and its salts / Etidronic acid and its salts
- CAS
- 2809-21-4
- Max concentration
- (a) 1.5% expressed as etidronic acid (b) 0.2% expressed as etidronic acid
- Product type
- (a) Hair care products (b) Soap
Source: ASEAN Cosmetic Directive (HSA Dec 2025)
GCC6 regulations
- Chemical name
- (1-Hydroxyethylidene)diphosphonic acid and its salts
- CAS
- 2809-21-4
- Max concentration
- (a) 1.5% (as etidronic acid) (b) 0.2% (as etidronic acid)
- Product type
- (a) Hair product (b) Soap
Source: GSO 1943:2024 (based on EU 1223/2009 III)
- Chemical name
- (1-Hydroxyethylidene)diphosphonic acid and its salts
- CAS
- 2809-21-4
- Max concentration
- (a) 1.5% (as etidronic acid) (b) 0.2% (as etidronic acid)
- Product type
- (a) Hair product (b) Soap
Source: GSO 1943:2024 (based on EU 1223/2009 III)
- Chemical name
- (1-Hydroxyethylidene)diphosphonic acid and its salts
- CAS
- 2809-21-4
- Max concentration
- (a) 1.5% (as etidronic acid) (b) 0.2% (as etidronic acid)
- Product type
- (a) Hair product (b) Soap
Source: GSO 1943:2024 (based on EU 1223/2009 III)
- Chemical name
- (1-Hydroxyethylidene)diphosphonic acid and its salts
- CAS
- 2809-21-4
- Max concentration
- (a) 1.5% (as etidronic acid) (b) 0.2% (as etidronic acid)
- Product type
- (a) Hair product (b) Soap
Source: GSO 1943:2024 (based on EU 1223/2009 III)
- Chemical name
- (1-Hydroxyethylidene)diphosphonic acid and its salts
- CAS
- 2809-21-4
- Max concentration
- (a) 1.5% (as etidronic acid) (b) 0.2% (as etidronic acid)
- Product type
- (a) Hair product (b) Soap
Source: GSO 1943:2024 (based on EU 1223/2009 III)
- Chemical name
- (1-Hydroxyethylidene)diphosphonic acid and its salts
- CAS
- 2809-21-4
- Max concentration
- (a) 1.5% (as etidronic acid) (b) 0.2% (as etidronic acid)
- Product type
- (a) Hair product (b) Soap
Source: GSO 1943:2024 (based on EU 1223/2009 III)
EAEUNo restrictions
No specific restrictions for ETIDRONIC ACID in Russia, Belarus, Kazakhstan, Armenia, Kyrgyzstan.
Frequently Asked Questions
Is ETIDRONIC ACID banned in any country?
ETIDRONIC ACID 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 ETIDRONIC ACID in cosmetics?
ETIDRONIC ACID is restricted or has conditions of use in UAE, Bahrain, European Union, Indonesia, South Korea, Kuwait, Malaysia, Oman, Philippines, Qatar, Saudi Arabia, Singapore, Thailand, 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 ETIDRONIC ACID in cosmetics?
ETIDRONIC ACID is regulated in 15 markets. It has restrictions in UAE, Bahrain, European Union, Indonesia, South Korea, Kuwait, Malaysia, Oman, Philippines, Qatar, Saudi Arabia, Singapore, Thailand, 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.