Is CI 42100 (Acid Green 9 / Steel Blue) safe in cosmetics?
CI 42100 (Acid Green 9 / Steel Blue) has a safety rating of "MODERATE" in our database. EU status: restricted. US status: prohibited.
Moderate
Cosmetic Ingredient
CI 42100 (Acid Green 9 / Steel Blue)
INCI: CI 42100
CI 42100 (Acid Green 9 / Steel Blue) (CAS 4857-81-2) is a cosmetic cosmetic ingredient functioning as Colorant. Synthetic triphenylmethane dye (Acid Green 9 / Steel Blue). EU Regulation 1223/2009 status: restricted, max Annex IV, Entry IV/64; restricted to rinse-off applications only. No maximum concentration specified for permitted rinse-off applications.. Industrial safety data is also available in the chemical safety database.
View industrial chemical safety profile for CAS 4857-81-2 →
Auto-generated CPSR Part A draft with source citations
Function
Colorant. Synthetic triphenylmethane dye (Acid Green 9 / Steel Blue). Water-soluble anionic sulfonated triphenylmethane dye. Permitted under EU Annex IV for rinse-off cosmetic applications only.
Safety Rating
MODERATE
Chemistry & Identifiers
IUPAC Name
sodium 3-[[4-[(2-chlorophenyl)-[4-[ethyl-[(3-sulfonatophenyl)methyl]azaniumylidene]cyclohexa-2,5-dien-1-ylidene]methyl]-N-ethylanilino]methyl]benzenesulfonate
InChIKey
SHBDDIJUSNNBLQ-UHFFFAOYSA-M
Regulatory Status
EU EU Status
restricted
EU Max Conc.
Annex IV, Entry IV/64; restricted to rinse-off applications only. No maximum concentration specified for permitted rinse-off applications.
US US Status
prohibited
US Notes
CI 42100 is not listed on the FDA Color Additives Permitted for Use in Cosmetics (21 CFR Parts 73, 74, or 82). Use in US cosmetics is not authorized.
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for CI 42100 (Acid Green 9 / Steel Blue).
Calculate MoS for your specific formulation with the MoS Calculator.
EU CosIng Annex Listing
European Commission CosIng database Annex references per Regulation (EC) No 1223/2009.
Annex IV — Permitted Colorants
Product type: Green
Expanded Jurisdictional Detail
Additional regulatory detail beyond the 7-jurisdiction summary: Saudi SFDA, Korea MFDS, ASEAN ACD, Japan/Korea, Brazil/India, and cross-jurisdictional restriction entries.
SA Saudi SFDA (IV - Colorants)
Product type: Rinse-off products.
BRIN Brazil/India Cosmetics
India: Permitted Colorant
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Dye
Expert Verdict
Expert safety assessment and concern-level summary for CI 42100 (Acid Green 9 / Steel Blue).
Regulatory Flags
eu-annex-iv
rinse-off-only-eu
not-fda-listed
no-us-authorization
triphenylmethane-dye
water-soluble
sulfonated
leave-on-prohibited-eu
green-dye
acid-green-9
Chemical Function
Dye
Australian Status
AICIS status: listed
Frequently Asked Questions
Is CI 42100 (Acid Green 9 / Steel Blue) allowed in the EU?
CI 42100 (Acid Green 9 / Steel Blue) EU regulatory status: restricted. Maximum allowed concentration: Annex IV, Entry IV/64; restricted to rinse-off applications only. No maximum concentration specified for permitted rinse-off applications.. This is based on EU Regulation 1223/2009 and its amendments.
What does CI 42100 (Acid Green 9 / Steel Blue) do in cosmetics?
CI 42100 (Acid Green 9 / Steel Blue) functions as: Colorant. Synthetic triphenylmethane dye (Acid Green 9 / Steel Blue). Water-soluble anionic sulfonated triphenylmethane dye. Permitted under EU Annex IV for rinse-off cosmetic applications only.. It is classified as a cosmetic ingredient in our database. CAS number: 4857-81-2.
Compliance Tools
Check CI 42100 (Acid Green 9 / Steel Blue) compliance across multiple jurisdictions:
Ingredient Decoder
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82 Allergen Checker
Check for EU declarable fragrance allergens
Substance Compliance
Check compliance across multiple jurisdictions
MoS Calculator
Calculate Margin of Safety using SCCS methodology
Heavy Metal Limits
Compare limits across jurisdictions
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