Get a Free 5ml Mini Now Free 5ml Mini With Every Order of The Mantle
Moumoujus

MIXED CRESOLS.

Avoid CAS 1319-77-3 / ANTIMICROBIAL, PERFUMING

Mixed Cresols function primarily as biocides and preservatives. However, their inclusion in precision skincare formulations is contraindicated due to a lack of definitive safety data and significant concerns regarding potential depigmentation and strong allergic responses.

Summary

preservative fragrance ingredient biocide

Science

Mechanism of Action

Mixed Cresols exert their biocidal and preservative effects through the destruction of bacterial cell membranes, thereby inhibiting microbial growth.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH N/A
0 7 14

Stability

Individual cresol isomers exhibit limited solubility in pure water (e.g., o-cresol 2.5 g/100 ml, m-cresol 2.4 g/100 ml, p-cresol 1.9 g/100 ml) but dissolve readily in strongly alkaline water, ethanol, ethylene glycol, and various organic solvents. Saturated solutions are typically neutral or slightly acidic. Cresols are generally stable under normal conditions but are susceptible to degradation from direct sunlight, heat, high temperatures, moisture, open flames, and overheating. Prolonged air exposure can lead to slow oxidation, resulting in a color shift from yellow to brownish red.

Conflicts

  • strong oxidizing agents (e.g., perchlorates, peroxides, permanganates, chlorates, nitrates, chlorine, bromine, fluorine)
  • strong acids (e.g., hydrochloric, sulfuric, nitric)
  • strong bases (e.g., sodium hydroxide, potassium hydroxide)
  • metals (e.g., potassium, sodium, magnesium, zinc)
  • amines
  • amides

Safety

Safety Profile

CIR Status
Insufficient data
Sensitization risk High

The CIR Expert Panel determined that insufficient data exists to support the safety of p-Cresol and Mixed Cresols for cosmetic applications. This conclusion is driven by concerns that p-Cresol, a constituent of mixed cresols, may induce hair and potentially skin depigmentation, and is identified as a strong allergen. Critical studies are required to establish a usage concentration that would preclude skin whitening or sensitization. While several other cresol derivatives are deemed safe up to 0.5% in cosmetics (with specific EU limits of 0.2% for p-Chloro-m-Cresol and 0.1% for o-Cymen-5-ol), Mixed Cresols lack this clear safety profile. Furthermore, Mixed Cresols are categorized as a hazardous substance, regulated by multiple agencies including OSHA, ACGIH, and EPA.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Avoid

Due to insufficient safety data, high sensitization risk, and potential for skin depigmentation, Mixed Cresols are not suitable for precision skincare formulations and should be avoided.

Related

Similar Ingredients

Finding similar ingredients…