Korean: 청색1호 · Functions: colorant, hair dyeing
Restricted MFDS restricted ingredients
Source: MFDS — cosmetic ingredient use restrictions · checked Oct 17, 2026
Restricted Annex III/190
Maximum: 0.5%
Conditions: Product type: Hair dye substance in non-oxidative hair dye products
Source: EU CosIng — Annex III · checked Oct 17, 2026
Approved colorant Annex IV/63
Conditions: Benzenemethanaminium, N-ethyl-N-(4-((4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)(2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-3-sulfo-, hydroxide, inner salt, disodium salt
Required label warning: Purity criteria as sset out in Commission Directive 95/45/EC (E 133)
Source: EU CosIng — Annex IV · checked Oct 17, 2026
No specific rule on file. The FDA regulates few cosmetic ingredients by name; no rule does not mean approval.
How CI 42090 is treated in 6 more markets, from the overseas cosmetic regulation database compiled by Korea's MFDS. Always confirm with the regulator of that country before selling there.
| Market | Status | Conditions |
|---|---|---|
| CN China | Restricted | MFDS summary (Korean): * 기타 제한조건 및 요구사항 : 2-,3-and4-Formyl benzene sulfonic acids 총량은 1.5%를 초과하지 않음; (3-(Ethyl(4-sulfophenyl)amino)methyl benzene sulfonic acid)는 0.3%을 초과하지 않음. Leuco base는 5.0%을 초과하지 않음; unsulfonated primary aromatic amines은 0.01%을 초과하지 않음 * 착색제 【사용허가 범위】 : 각종 화장품 |
| AS ASEAN (10 countries) | Restricted | Field of application : Colouring agents allowed in all cosmetic products |
| JP Japan | Restricted | MFDS summary (Korean): * 【제품 타입 또는 목적 (types or intended purposes of cosmetics)】 : 외용의약품, 외용의약부외품, 화장품에 사용 할 수 있는 색소 * 화장품용 타르 색소 : 이 성분의 알루미늄레이크 포함 * 【제품 타입 또는 목적 (types or intended purposes of cosmetics)】 : 모든 의약품, 의약부외품, 화장품에 사용할 수 있는 색소 * 화장품용 타르 색소 : 이 성분의 알루미늄레이크 포함 이 성분의 바륨레이크 포함 이 성분의 지르코늄 레이크 포함 |
| TW Taiwan | Restricted | MFDS summary (Korean): 1. 所列色素與非禁用成分形成之麗基（lakes）及鹽（salts）亦可使用。 2. 未列載於此表規定範圍之成分，於歐盟、美國及日本三國家地區，任何其中一個國家地區官方已公告（以生效日為準）其使用基準者，得參照其基準規定准予使用(但下表CI 11380 等十九項成分不適用)，惟於申請查驗登記時，應同時檢附該等地區之准許使用基準證明文件。 * 단서조항 : 1. 所列色素與非禁用成分形成之麗基（lakes）及鹽（salts）亦可使用。 2.... |
| BR Brazil | Restricted | MFDS summary (Korean): * Restrictions 【Field of application and/or use】 : Dye Substances allowed for all kinds of products. * 제한 【사용 범위】 : 모든 종류의 제품에서 허용된 염색 성분 |
| AR Argentina | Restricted | MFDS summary (Korean): * Restrictions 【Field of application and/or use】 : Dye Substances allowed for all kinds of products. * 제한 【사용 범위】 : 모든 종류의 제품에서 허용된 염색 성분 |
Source: MFDS cosmetic ingredient use restrictions — overseas regulations · checked Oct 17, 2026
Blue 1 Blue 1 Lake Acid Blue 9; Acid Blue 9 Ammonium Salt; Acid Blue 9 Aluminum Lake Alphazurine FG Brilliant Blue FCF CI 42090 FD&C Blue 1 FD&C Blue No. 1 FD&C Blue No.1
Information only, not medical advice. Rules change — always check the linked official source. If you are pregnant, have a skin condition or allergies, ask a dermatologist or pharmacist.
In the EU's CosIng records it is listed as “Restricted” (EU CosIng — Annex III). The maximum allowed is 0.5%. The same records also list it as: Approved colorant. A restricted ingredient is allowed within the stated conditions.
In Korea's MFDS records it is listed as “Restricted” (MFDS — cosmetic ingredient use restrictions). A restricted ingredient is allowed within the stated conditions.
We found no specific rule for it in the FDA's records. That is not an approval or a safety statement.
The EU's CosIng inventory lists its functions as: colorant, hair dyeing.
Korea's MFDS standard Korean name is 청색1호.
22 products we checked list it, for example COSRX 5 Peptide Collagen Tinted Lip Fill Treatment, Unleashia A by Unleashia Cloud Kiss Velvet Tint, Unleashia A by Unleashia Tanghulu Glaze Tint.