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Product Definition
Caprylhydroxamic Acid is a high-purity organic acid supplied as a white or off-white crystalline solid. It functions as a potent, non-traditional preservative enhancer by creating an iron-restricted environment that limits microbial proliferation, particularly against fungi. It is designed to replace or reduce reliance on conventional preservatives in personal care formulations.
Product Parameters
|
Parameter |
Specification |
|
Product Name |
Caprylhydroxamic Acid |
|
Appearance |
White or off-white crystalline solid |
|
Solution Clarity & Color |
Solution should be clear and colorless |
|
Melting Point |
78.0- 82.0℃ |
|
Loss on Drying |
≤ 0.50% |
|
Chloride |
≤ 0.5% |
|
Residue on Ignition |
≤ 0.10% |
|
Total Impurities |
≤ 1.00% |
|
Assay (HPLC) |
≥ 99.0% |
Product Advantages
- High-Potency Mold Inhibition: Exhibits highly selective chelation of ferric and ferrous ions, effectively starving molds (e.g., Aspergillus niger) of essential nutrients required for growth .
- Broad pH Stability: Maintains effective antimicrobial activity across a pH range of 2 to 8, offering flexibility in various formulation types, including acidic and neutral systems.
- Thermal Processing Tolerance: Demonstrates process stability suitable for manufacturing, withstanding temperatures up to 90°C for 2 hours or 60°C for 6 hours without significant degradation.
- Synergistic Versatility: Easily dissolves in glycols and glycerin for seamless integration into both cold and hot processes, enabling robust preservation when paired with bacteria/yeast inhibitors like Phenoxyethanol or Caprylyl Glycol.
Primary Application Scenarios
- Emulsified Systems: Ideal for O/W lotions and creams; can be added post-emulsification to ensure uniform dispersion without destabilizing the base.
- Anhydrous Formulations: Suitable for lipsticks, balms, and oil-based serums where water activity is low, providing fungal protection without requiring a water phase.
- Surfactant-Based Systems: Compatible with rinse-off products like facial cleansers and shampoos, where it helps maintain microbiological integrity during use and storage.
Frequently Asked Questions (FAQ)
Q: Can Caprylhydroxamic Acid be used alone as the sole preservative in a cosmetic formula?
A: No. To achieve broad-spectrum control against bacteria, yeast, and mold, it must be combined with bacterial and yeast inhibitors such as diols (e.g., Phenoxyethanol, 1,2-Octanediol, or Ethylhexylglycerin). Using it alone may leave the product vulnerable to bacterial contamination.
Q: Does this ingredient require special storage conditions or packaging?
A: Yes. The packaging must remain sealed and protected from moisture. It should be stored in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and incompatible materials like strong acids or combustibles.
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