Basic Yellow 57

What is Basic Yellow 57?

Basic Yellow 57, identified as C.I. 12720, is a synthetic azo-based cationic dye produced through chemical processes. It belongs to the category of direct hair dyes used in semi-permanent coloring products. This ingredient functions by electrostatically binding to the hair's keratin structure, which carries a negative charge, allowing it to deposit color without chemical alteration of the hair fiber. Primarily featured in shampoos, conditioners, or gels designed for temporary color enhancement, it delivers bright yellow tones that blend with other dyes for custom shades. Its water-soluble nature supports even application and gradual fading with washes, making it suitable for at-home or professional use in non-oxidative systems.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 3 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Hair colorant
Delivers hair color through dyes and/or pigments (direct or oxidative systems), producing a visible shade change and supporting coverage and longevity.
Hair dyeing
Supports chemical color change of hair (e.g., oxidative dye development or bleaching), enabling shade transformation through controlled reactions on the fiber.

Benefits

Imparts vibrant yellow hues for creative hair styling.

Enables direct color deposition without peroxide developers.

Supports shade blending for personalized color results.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
People exploring temporary yellow hair effects.
Those with dye allergies or skin sensitization history.
Users preferring milder non-permanent dyeing options.
People prone to scalp irritation from colorants.
Individuals customizing multi-tone hair colors.
Individuals with compromised skin barrier on scalp.

Safety Notes

  • Considered moderate hazard in some assessments due to sensitization potential.
  • Patch testing recommended prior to use per standard hair dye guidelines.

Frequently Asked Questions about Basic Yellow 57

What role does Basic Yellow 57 play in hair products?

It acts as a direct colorant to add yellow tones by binding to hair fibers.

Is Basic Yellow 57 suitable for sensitive scalps?

Caution advised; those with sensitivities should patch test first.

How long does color from Basic Yellow 57 last?

It offers temporary to semi-permanent results, fading with shampooing.