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
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 · EWG: 5
Synthetic
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
See origin →
Functions
Hair Dyeing
Colorant
Gives the product its color. Purely aesthetic — makes the formula look good in the jar but does nothing for your skin.
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
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Caution
EWG
5
CIR
Insufficient
Pregnancy
Caution
CIR Safety Findings
ewg-5
medical-approval
all-shades-safe
Regulatory Status
USAunder review
EUpermitted
JAPANpermitted
CANADApermitted
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR