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POTASSIUM BICARBONATE.

Valuable CAS 298-14-6 / BUFFERING

Potassium Bicarbonate is an alkaline salt primarily utilized in skincare formulations for precise pH stabilization and buffering. It also exhibits mild antimicrobial properties, contributing to formulation integrity and potentially inhibiting unwanted microbial growth on the skin surface.

Summary

pH Adjuster Buffering Agent Antimicrobial Agent Antifungal Agent Odor Neutralizer

Science

Mechanism of Action

Its primary mechanism involves the release of bicarbonate ions in aqueous solutions, which effectively neutralizes acids and stabilizes a formulation's pH. This buffering capacity is crucial for maintaining optimal product efficacy and ensuring skin compatibility. Furthermore, Potassium Bicarbonate demonstrates mild antimicrobial and antifungal capabilities, which can aid in inhibiting the proliferation of detrimental microbes, including certain bacteria and fungi, within the product and potentially on the skin.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

No data suggests Potassium Bicarbonate is commonly 'dusted' or poses a specific concern in typical cosmetic formulations regarding its concentration or usage patterns.

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

Potassium Bicarbonate exhibits stability under ordinary conditions of use and storage, with decomposition occurring between 100°C and 120°C. A 1% solution typically presents an approximate pH of 8.2, underscoring its utility as an effective pH buffer and stabilizer in diverse formulations.

Conflicts

  • Acids
  • Lime
  • Prolonged contact with aluminum, brass, bronze, copper, lead, tin, zinc, or other alkali-sensitive metals or alloys
  • Chlorine trifluoride
  • Bromine trifluoride

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel concluded Potassium Bicarbonate is 'safe in the present practices of use and concentration, as described in this safety assessment, when formulated to be non-irritating'. It is also Generally Recognized As Safe (GRAS) by the FDA for food applications and registered for use in OTC antacids. While some safety data sheets mention potential for mild skin irritation, comprehensive data, including animal models, indicate it is not irritating to skin and did not elicit dermal sensitization. Eye contact is more consistently reported as causing mild to moderate irritation. No SCCS opinion for skincare was identified.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Potassium Bicarbonate is a valuable ingredient for achieving precise pH control and enhancing formulation stability in skincare, offering a low irritancy profile and mild antimicrobial benefits.

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