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CI 44045.

Questionable CAS 2580-56-5 / COLORANT

CI 44045, also known as Victoria Blue B, is a synthetic triarylmethane dye used to impart a distinct blue hue to cosmetic formulations. It serves a purely aesthetic function, providing visual identity to products rather than delivering biological benefits to the skin barrier.

colorant

Science

This ingredient acts as a colorant by absorbing and reflecting specific wavelengths of physical light. It deposits pigment onto the surface of the skin, hair, or nails to modify their visual appearance through light manipulation.


Research

Low confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

As a colorant, CI 44045 is inherently used in very low concentrations; however, because it offers no clinical skin-improving benefits, any inclusion in a 'treatment' product is strictly for marketing aesthetics.


The Formula

Solubility
Both
Optimal pH N/A
0 7 14

Stability

Decomposition occurs at temperatures exceeding 100°C. Staining intensity and results are highly sensitive to pH levels and buffer solutions within the formula.

Conflicts

  • strong oxidizing agents
  • temperatures >100°C

Safety

CIR Status
Not reviewed
Sensitization risk Moderate

Explicitly prohibited by EU Regulation (EC) No. 1223/2009 for use on or near mucous membranes, including the lips and eyes. While regulated in finished goods, the raw chemical is flagged for potential respiratory and skin sensitization, as well as suspected genetic risks.


Your Skin

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

Our Assessment

Questionable

A purely aesthetic synthetic dye with significant area restrictions and potential safety concerns that outweigh its visual utility in high-performance skincare.


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