Basic Blue 99

Basic Blue 99 1
molecular structure · PubChem CID 93377
AKA: 68123-13-7, C.I. Basic Blue 99, Jarocol Steel Blue, CI 56059, ARIANOR STEEL BLUE 306004, Benzenaminium, 3-((4-amino-6-bromo-5, 8-dihydro-1-hydroxy-8-imino-5-oxo-2-naphthalenyl)amino)-N, Chloride, Chloride (1:1)
Synthetic
Skin Conditioner
Hair Care
Not Clean
OriginBasic Blue 99 is a synthetic triphenylmethane dye belonging to the family of cationic colorants. It is synthesized through oxidative coupling reactions of aromatic amines and related precursor compounds.
3-[(4-amino-6-bromo-5,8-dihydro-1-hydroxy-8-imino-5-oxo-2-naphtyl)amino]-N,N,N-trimethylanilinium chloride (CI 56059)
Formula
C19H20BrClN4O2
Mol. Weight
451.70
CAS #
68123-13-7
State
Black odorless powder; [EC: SCCS - Opinion]
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
Functions
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Hair Dyeing
Conditions Hair
Antioxidant Protection
Locks In Moisture
Brightens Skin
Softens and detangles hair
Colors hair
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
4
CIR
Safe as used · CIR tentative re-review report (2026)
Pregnancy
Caution
CIR Safety Findings
Mixed Skin Irritation Results
4 studies / 1 irritating / 1 mixed / 2 not irritating / reactions mild (CIR 356 and 870)
Mixed Eye Irritation Results
2 studies / 1 irritating / 1 not irritating (CIR 356 and 870)
Mixed Sensitization Results
4 studies / 1 sensitizing / 3 not sensitizing / plus 4 case reports (CIR 356 and 870)
Dermal Absorption 0.01–5.05%
10 animal and human studies in the CIR safety assessment (CIR 356)
Concentration Guide
Leave-onNot reported
Rinse-off0.01–0.88%
0%50%100%
CIR reported use · 2025 survey
Regulatory Status
USAunder review
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR