Moderate Cosmetic Ingredient

CI 15620 (Acid Red 88)

INCI: CI 15620

CAS Number
1658-56-6
Function
Colorant. Synthetic monoazo red dye (Sodium 4-[(2-hydroxy-1-naphthyl)azo]naphthalenesulphonate), also known as Acid Red 88. Water-soluble anionic azo dye imparting a red hue to cosmetic formulations. EU-permitted for use in rinse-off cosmetics only. Used in hair dyes and rinse-off personal care products.
Safety Rating
MODERATE

Regulatory Status

🇪🇺 EU Status restricted
EU Max Conc. Rinse-off products only
🇺🇸 US Status prohibited
US Notes CI 15620 is not listed by the FDA as a permitted color additive for cosmetics under 21 CFR Parts 73 or 74. It does not appear in the FDA color additives inventory for cosmetic or drug use. Formulations containing CI 15620 intended for US distribution would not be compliant. Use in the US is prohibited by omission from the FDA approved list.

For full compliance data across 55 jurisdictions, use the Substance Compliance tool.

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
low
Sensitization
moderate

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

CI 15620 (Acid Red 88) is EU Annex IV listed with a restriction limiting its use to rinse-off cosmetic products only. It is not approved for leave-on formulations in the EU and is entirely absent from the FDA approved color additive list, prohibiting US use. Moderate concern reflects the EU use restriction and lack of US approval, though within EU-compliant rinse-off use, the risk profile is manageable.

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Concern Level: Moderate

Regulatory Flags

azo-dye eu-annex-iv eu-restricted rinse-off-only not-fda-approved eu-only no-us-use synthetic-colorant hair-dye-compatible eu_cosing_listed

Frequently Asked Questions

Is CI 15620 (Acid Red 88) safe in cosmetics?

CI 15620 (Acid Red 88) is EU Annex IV listed with a restriction limiting its use to rinse-off cosmetic products only. It is not approved for leave-on formulations in the EU and is entirely absent from the FDA approved color additive list, prohibiting US use. Moderate concern reflects the EU use restriction and lack of US approval, though within EU-compliant rinse-off use, the risk profile is manageable. The EU classifies CI 15620 (Acid Red 88) as "restricted". Safety rating: MODERATE.

Is CI 15620 (Acid Red 88) allowed in the EU?

CI 15620 (Acid Red 88) EU regulatory status: restricted. Maximum allowed concentration: Rinse-off products only. This is based on EU Regulation 1223/2009 and its amendments.

What does CI 15620 (Acid Red 88) do in cosmetics?

CI 15620 (Acid Red 88) functions as: Colorant. Synthetic monoazo red dye (Sodium 4-[(2-hydroxy-1-naphthyl)azo]naphthalenesulphonate), also known as Acid Red 88. Water-soluble anionic azo dye imparting a red hue to cosmetic formulations. EU-permitted for use in rinse-off cosmetics only. Used in hair dyes and rinse-off personal care products.. It is classified as a cosmetic ingredient in our database. CAS number: 1658-56-6.

What is the Margin of Safety for CI 15620 (Acid Red 88)?

not established The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.

Compliance Tools

Check CI 15620 (Acid Red 88) compliance across multiple jurisdictions:

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Ingredient Decoder
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82 Allergen Checker
Check for EU declarable fragrance allergens
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Substance Compliance
Check compliance across 55 jurisdictions
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MoS Calculator
Calculate Margin of Safety using SCCS methodology
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Heavy Metal Limits
Compare limits across jurisdictions

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