Snapshot
- Overview
- A strong preservative that fights microbes but may irritate skin.
- Category
- Preservative
- Type
- Preservative
Glutaral
Glutaral is a potent dialdehyde used in cosmetics as a high-efficacy biocidal preservative at very low concentrations. It's chosen to control bacteria, yeast, and mold in formulations, but strong sensitization potential restricts use, especially in leave-on products.
Like this ingredient?
Our take
Is Glutaral a Good Ingredient?
It rates Poor because, despite genuinely strong preservation at small doses, it carries a high irritation and sensitization risk that limits consumer tolerance and versatility. Many formulators avoid it in favor of gentler systems, which is exactly why it sits at the bottom of the scale.
What it does
Skin Benefits
Provides broad-spectrum microbe control at low doses, supporting product stability over time. Better suited to rinse-off formats where brief contact reduces sensitization risk.
Where you'll find it
Uses in Skincare & Cosmetics
Found in shampoos, hand washes, and industrial-strength cleansers; occasionally in wipes. Rare in leave-on creams or serums due to allergy concerns.
Before you use it
Safety
A known skin sensitizer that can cause irritation and allergic contact dermatitis, particularly in leave-on use. Avoid use on compromised skin and keep away from eyes; patch testing is prudent. Use is concentration-limited in some regions.
