Di-t-Butylhydroquinone
AKA “5-Di-tert-butylhydroquinone, DTBHQ, Dibug, Dybug, Santovar O, 5-Di-tert-butylquinol, Nonflex Alba
Synthetic
Ingredient Facts
Di-t-Butylhydroquinone
AKA: 5-Di-tert-butylhydroquinone, DTBHQ, Dibug, Dybug, Santovar O, 5-Di-tert-butylquinol, Nonflex Alba
Synthetic · Antioxidant · EWG: 3
Synthetic
Antioxidant
Anti-Aging
Barrier Support
Safety Concern
Synthetic
Clean
A protective antioxidant that helps prevent product oxidation and degradation, keeping formulas stable and effective over time.
Formula
C14H22O2
Mol. Weight
222.32
CAS #
88-58-4
Form
Powder
State
Off-white crystalline powder; [Alfa Aesar MSDS]
See origin →
Functions
Antioxidant
Fights free radicals — the unstable molecules from UV, pollution, and stress that break down collagen and cause premature aging.
Anti-Aging
Targets fine lines, wrinkles, or loss of firmness. Works by boosting collagen, speeding cell turnover, or both.
Skin Protecting
Helps rebuild and strengthen your skin barrier — the invisible shield that keeps moisture in and irritants out. Essential after over-exfoliating or harsh weather.
Neutralizes Free Radicals
Traditional Use
A synthetic antioxidant developed in the mid-20th century, primarily used in cosmetic oils and fats. Designed to prevent rancidity and color degradation in cosmetic formulations, with no traditional use.
Skin Types
all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Caution
EWG
3
CIR
Safe w/Qualifications
Pregnancy
Caution
CIR Safety Findings
all-shades-safe
Potential Sensitizer
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR