Basic Blue 7
AKA “Victoria Pure Blue BO, C.I. Basic Blue 7, Eljon Blue Toner, Silosuper Blue B, Victoria Pure Blue, Victoria Blue FBO, Victoria Pure Blue RB, Aizen Victoria Blue BO”
Synthetic
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Ingredient Facts
Basic blue 7
AKA: Victoria Pure Blue BO, C.I. Basic Blue 7, Eljon Blue Toner, Silosuper Blue B, Victoria Pure Blue, Victoria Blue FBO, Victoria Pure Blue RB, Aizen Victoria Blue BO
Synthetic · Hair Dyeing | Colorant · EWG: 5
Plant-Derived
Colorant
Synthetic
Clean
A synthetic colorant that delivers rich, vibrant blue tones to hair. Provides long-lasting color that resists fading with each wash.
Formula
C33H40ClN3
Mol. Weight
514.10
CAS #
2390-60-5
Form
Powder
Plant-Derived
Synthetic. Basic Blue 7 is synthesized from aromatic amines and formaldehyde as primary starting materials. It is produced through condensation and oxidation reactions to form the triphenylmethane dye structure.
Function
Hair Dyeing | Colorant
Benefits
Hair Dyeing
Locks In Moisture
Anti-Aging Benefits
Antioxidant Protection
Colors Hair
Traditional Use
Synthetic organic dye developed in the early 20th century for textile and cosmetic coloring. Used in cosmetics as a colorant for eyeshadows, eyeliners, and other color cosmetics.
Skin Types
all-skin-types
Best For
Target
General
Melanin-Rich Skin
Suitable
Pregnancy Safe
Caution
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR