Colloidal Sulfur
Colloidal Sulfur
COL
6/10
Concern level
Moderate concern
Colloidal sulfur is finely divided sulfur used in skincare for its keratolytic, antiseptic, and acne-directed effects. It is a classic anti-blemish ingredient and is also used in products targeting excess oil and rough texture.
Pore-clogging
Non-comedogenic
Pregnancy
Safe
Regulatory
No data
Benefits
Controls Oil ProductionAcne-fightingAntiseptic
Chemical Properties
Molecular Weight
32.06 g/mol pH Range
4.00 - 7.00Typical Concentration
1.00% - 10.00%CAS Number: 7704-34-9
Skin Type Compatibility
dry skin2/10
oily skin8/10
sensitive skin2/10
acne prone9/10
mature skin3/10
normal skin5/10
Interactions
incompatible with: May be too irritating with retinoids, Use caution with benzoyl peroxide, salicylic acid, AHAs, and other exfoliants
Risks & Warnings
Commonly causes dryness, peeling, stinging, odor, and irritation, especially at higher strengths or with frequent use. Can be too drying for compromised barrier skin. Avoid overuse with other strong acne actives.
Vegan Cruelty-Free
