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Moumoujus

CI 10316.

Valuable CAS 846-70-8 / COLORANT, HAIR DYEING

CI 10316, also recognized as Acid Yellow 1 or D&C Yellow No. 7, is a synthetic coloring agent primarily employed in cosmetic formulations to impart a distinct yellow coloration. Its function is purely aesthetic, contributing visual appeal rather than active biological effects on skin cells.

Summary

Cosmetic Colorant Hair Dyeing

Science

Mechanism of Action

This ingredient operates as a cosmetic colorant, imparting a yellow hue to products, skin, nails, or hair through the absorption or reflection of physical light. It does not engage in any active biological mechanisms within skin cells.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 An in vitro MTT assay demonstrated 96% cell viability when CI 10316 was applied neat, indicating a low potential for irritancy.
  2. 02 At a 2% concentration in water, CI 10316 maintained 93% cell viability in an in vitro MTT assay, further supporting its low irritancy potential. The SCCS concluded that irritant effects on human skin are unlikely at the maximum intended concentration of 1% in hair dye formulations.

Transparency

Dusting Analysis

Not commonly dusted

No specific data is available regarding the dusting characteristics of CI 10316.

The Formula

Formulation

Solubility
Water
Optimal pH 5 – 10
0 7 14

Stability

CI 10316 exhibits stability within a pH range of 5.0 to 10.0. Its solubility in water is approximately 42.2 g/L at 20°C (pH 7.75), with solubility enhancing at pH values above 8.0. While it possesses moderate UV resistance, the inclusion of a UV filter is recommended in formulations to protect the color from fading.

Conflicts

  • Not recommended for use in cream, lotion, gel, or serum formulations if surface adhesion of the color is desired, as it may not adhere effectively. An easy-wash off variant may be more suitable.
  • Unsuitable for makeup applications where critical adhesion is required.
  • The stability of CI 10316 in oxidative hair dye formulations has not been fully established.

Safety

Safety Profile

CIR Status
Not reviewed
Max tested
6%
Sensitization risk Low

CI 10316 is approved for use in all cosmetic products under EC Cosmetics Regulation, with the specific exclusion of products for the eye area, including eye make-up and removers. The Scientific Committee on Consumer Products (SCCP) deemed it safe for consumers in oxidative hair dye formulations at a maximum scalp concentration of 1.0%, and in non-oxidative hair dyes at a maximum scalp concentration of 0.2%. The FDA permanently listed D&C Yellow No. 7 (CI 10316) in 1983 as a certified color additive for drugs and cosmetics, subject to Good Manufacturing Practices (GMP) and specific restrictions. General cosmetic usage rates can extend up to 6%.

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

CI 10316 is a valuable and widely regulated cosmetic colorant, demonstrating a low potential for irritancy, utilized exclusively for aesthetic purposes to impart a yellow hue in diverse product formulations.

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