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Moumoujus

SILVER SULFATE.

Questionable CAS 10294-26-5 / ANTIMICROBIAL

Silver Sulfate is an inorganic silver compound recognized for its potent antimicrobial and anti-inflammatory properties within skincare formulations. It operates by releasing silver ions, targeting bacterial proliferation, and modulating inflammatory pathways.

Summary

Antimicrobial Anti-inflammatory Skin Conditioning

Science

Mechanism of Action

Silver Sulfate primarily functions via the liberation of silver ions (Ag+), which bind to bacterial DNA, inhibiting replication and bacterial cell growth. In cosmetic applications, general silver compounds also exhibit anti-inflammatory effects by disrupting the VEGF pathway, reducing pro-inflammatory mediators such as TNF-alpha and IL-6, inhibiting nuclear factor-kB signaling, and suppressing prostaglandin and cyclooxygenase synthesis.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 5 – 6
0 7 14

Stability

Silver Sulfate is stable but exhibits photosensitivity, darkening upon exposure to air or light. It requires storage in a tightly closed, light-resistant container in a cool, dry, and ventilated area. Its sparing solubility in water increases in more acidic solutions (lower pH).

Conflicts

  • Peroxides
  • Borohydrides
  • Cyanoborohydrides
  • Chlorine trifluoride
  • Strong acids
  • Nitric acid + ethanol (can form explosive silver fulminate)
  • Acetylene (can form explosive compounds)
  • Nitromethane (can form explosive compounds)

Safety

Safety Profile

CIR Status
Deferred evaluation
Max tested
0.3%
Sensitization risk Moderate

The Cosmetic Ingredient Review (CIR) has deferred evaluation of elemental silver due to prior FDA assessment. The FDA lists Silver (CI 77820) as a color additive for nail polish up to 1%. However, the SCCS considers micron-sized particulate Silver unsafe in total concentrations above 0.3% in leave-on cosmetic products. While SkinSAFE lists Silver Sulfate as '100 Free' from common allergens, it can induce skin inflammation or exacerbate pre-existing dermatitis in certain individuals. Chronic exposure is associated with argyria, a permanent bluish-gray tissue discoloration.

Your Skin

Skin Compatibility

Yes Normal
No Dry
Yes Oily
No Sensitive
Irritancy Moderate
Comedogenicity Unknown

Our Assessment

Verdict

Questionable

While exhibiting clear antimicrobial and anti-inflammatory mechanisms, the absence of specific clinical efficacy data for skincare and notable safety concerns, including the risk of argyria and potential for contact inflammation, render Silver Sulfate a questionable ingredient for precision skincare formulations.

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