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SODIUM THIOCYANATE.

Questionable CAS 540-72-7 / HAIR CONDITIONING

Sodium thiocyanate is an inorganic salt known for its enzymatic modulation, specifically targeting myeloperoxidase (MPO) activity to generate hypothiocyanous acid (HOSCN). This mechanism imparts both antimicrobial and antioxidant properties, offering a pathway to potentially mitigate oxidative damage at a cellular level.

antioxidant antimicrobial hair conditioning

Science

Sodium thiocyanate exerts its biological effects by interacting with myeloperoxidase (MPO), an enzyme involved in inflammatory processes and oxidative stress. This interaction facilitates the increased production of hypothiocyanous acid (HOSCN), a reactive species that demonstrates both antimicrobial and antioxidant capabilities. HOSCN selectively targets low-molecular weight protein thiols, which is posited to reduce MPO-associated oxidative damage and subsequent tissue degradation.


Research

Low confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Water
Optimal pH 4.8 – 9
0 7 14

Stability

Sodium thiocyanate is hygroscopic, meaning it readily absorbs moisture from the air, and is susceptible to degradation by light. It may also decompose upon heating or prolonged exposure to light.

Conflicts

  • strong acids
  • strong bases
  • strong oxidizing agents
  • strong reducing agents
  • excess heat
  • exposure to light
  • moist air or water
  • metals and some metal compounds (potential to polymerize nitriles)

Safety

CIR Status
Not reviewed
Sensitization risk Moderate

The Cosmetic Ingredient Review (CIR) has not assessed Sodium Thiocyanate for topical use. While the FDA classifies it as Generally Recognized As Safe (GRAS) for specific food applications (e.g., component of lactoperoxidase system for dairy shelf-life), this designation does not extend to skincare. Potential topical concerns include mild skin irritation and serious eye damage. Exposure via skin contact or inhalation of dust can be harmful, and chronic exposure has been linked to skin rashes. Notably, sensitization has been observed in both human and guinea pig studies.


Your Skin

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

Our Assessment

Questionable

Given the absence of specific topical safety data, documented irritation, and sensitization risk, the strategic inclusion of Sodium Thiocyanate in Moumoujus's precision skincare formulations warrants significant caution and further investigation.


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