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Moumoujus

PHOSPHORUS.

Avoid CAS 7723-14-0 / NOT REPORTED

Elemental phosphorus is a highly reactive and inherently toxic chemical element, rendering it unsuitable for direct topical application in skincare formulations. While its numerous derivatives, such as phosphates and phospholipids, play indispensable roles in cosmetic products, phosphorus itself is not utilized.

Summary

Science

Mechanism of Action

Elemental phosphorus possesses no recognized mechanism of action on the skin as a direct cosmetic ingredient, primarily due to its extreme reactivity and inherent toxicity. However, its derivatives, including phosphates and phospholipids, are well-established for their diverse functions, acting as buffering agents, sequestrants, antioxidants, and integral components in formulations designed to mimic and support the skin's natural barrier.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

Elemental phosphorus is not employed as an ingredient in cosmetic formulations, negating concerns regarding product dusting.

The Formula

Formulation

Solubility
Unknown
Optimal pH N/A
0 7 14

Stability

Elemental phosphorus exhibits extreme reactivity and instability; white phosphorus, a common allotrope, ignites spontaneously upon exposure to air, necessitating storage under water. This inherent instability makes it entirely incompatible with cosmetic formulation processes and product shelf-life requirements.

Conflicts

  • Highly reactive substances
  • Air (for white phosphorus)

Safety

Safety Profile

CIR Status
Not reviewed
Pregnancy
Caution
Sensitization risk High

Elemental phosphorus, particularly its white allotrope, is recognized as extremely toxic and highly reactive, igniting spontaneously in air. Consequently, it is unequivocally not used as a direct ingredient in cosmetic products. It is crucial to distinguish this from its derivatives; the CIR Expert Panel has reviewed Phosphoric Acid and its simple salts, deeming them safe for use when formulated to be non-irritating. Similarly, 28 alkyl phosphates have been found safe under current use practices. However, the SCCS raised genotoxicity concerns regarding Triphenyl Phosphate. The FDA's regulatory mentions of phosphorus are primarily in the context of oral and injectable drug products, not as a direct cosmetic ingredient.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Avoid

Due to its extreme toxicity, high reactivity, and spontaneous flammability, elemental phosphorus must be strictly avoided as a direct ingredient in skincare formulations.

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