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Moumoujus

MAGNESIUM NITRATE.

Questionable CAS 10377-60-3 / HAIR CONDITIONING

Magnesium Nitrate primarily functions as a formulation stabilizer, pH adjuster, and preservative enhancer in cosmetics, while also offering humectant properties to the skin. Despite its moisturizing potential, its classification as an irritant in concentrated forms and general caution regarding nitrates position it as a less preferred option for direct topical skincare, with milder alternatives typically favored.

Summary

Humectant pH adjuster Preservative enhancer Hair conditioning

Science

Mechanism of Action

As a humectant, Magnesium Nitrate actively attracts and retains moisture in the stratum corneum, which may contribute to enhanced skin hydration and improved barrier function. Within formulations, it serves to precisely adjust pH levels, ensuring optimal product stability and efficacy. Furthermore, it acts as a preservative enhancer, notably boosting the antimicrobial action of common preservatives like phenoxyethanol and chlorphenesin.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

No data suggests this ingredient contributes to a 'dusting' effect on the skin.

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

Magnesium Nitrate is employed to regulate product pH, maintaining overall stability. However, it is sensitive to heat, decomposing to emit toxic fumes including nitrogen oxides. Spontaneous decomposition has been observed in dimethylformamide, possibly due to hydrolysis. Storage should strictly avoid extreme heat, ignition sources, and incompatible materials to prevent degradation.

Synergies

  • phenoxyethanol (preservative enhancement)
  • chlorphenesin (preservative enhancement)

Conflicts

  • oxidizable compounds (potential for violent combustion)
  • extreme heat
  • ignition sources
  • dimethylformamide (potential for spontaneous decomposition)

Safety

Safety Profile

CIR Status
Not directly reviewed as a standalone cosmetic ingredient
Sensitization risk Moderate

While not prohibited by the FDA, its cosmetic use must adhere to general safety standards. The SCCS has approved its specific use as a stabilizer within MCI/MI preservative mixtures under defined conditions. However, nitrates in general are not recommended for routine topical cosmetic application, with milder magnesium derivatives being preferred due to the potential for skin irritation, particularly in sensitive individuals. In higher concentrations, it is classified as an irritant and oxidizer.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Questionable

Due to a lack of direct clinical efficacy data for skin benefits, alongside documented irritation potential and preference for milder alternatives, Magnesium Nitrate is considered a questionable ingredient for precision topical skincare applications.

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