Preservatives for Fresh Herbal Pet Shampoo
Question
What are the recommended preservatives for herbal shampoos for dogs and cats that are formulated using freshly boiled herbal extracts? Please consider the unique challenges of microbial contamination in such formulations and suggest suitable broad-spectrum and mild options, along with any specific usage guidelines and precautions.
Answer
For herbal shampoos for dogs/cats using fresh boiled herbs, selecting an appropriate preservative is crucial due to the high risk of microbial contamination from fresh herbal extracts. We recommend broad-spectrum and mild preservatives as follows:
Coco-Preserve™ (Preservative from Coconut Extract)
- A natural preservative derived from coconut extract.
- Directly water-soluble, making it suitable for formulas containing fresh herbal water extracts.
- Highly effective in controlling bacteria (both gram-positive and gram-negative), yeast, and mold.
- Can be used in formulas with a wide pH range of 4-8.
- Caution: Avoid heat exceeding 50°C during the mixing process.
Mild Preserved CGZ™ (Preservative-Free, Wide-pH Range)
- A highly effective yet gentle preservative that does not cause irritation.
- Not classified as a preservative by the FDA, allowing for "preservative-free" claims.
- Odorless, so it does not affect the shampoo's scent.
- Has a wide pH range (4-9) and can withstand heat up to 80°C for no more than 5 minutes.
- Soluble in glycols, alcohol, dispersible in oil, and can dissolve in water with proper blending.
Thyme Care™ (natural preservative)
- A natural preservative extracted from Thyme and Bois De Rose.
- Broad-spectrum efficacy in inhibiting the growth of bacteria, yeast, and mold.
- Can be used in formulas with a very wide pH range (2-10) and withstands heat up to 80°C for no more than 15 minutes.
- Caution: It has a strong natural thyme scent, which might need to be considered for pet shampoos or require additional fragrance adjustments.
PaeoniaPreserve™ (Natural Preservative)
- A natural preservative derived from Paeonia root.
- Effective in microbial control and can be used as a sole preservative in formulations.
- Has a yellow color and a mild natural scent.
- Water-soluble.
- Caution: Avoid heat above 60°C during the mixing process.
Additional Recommendation:
Given the high potential for contamination and the complexity of microbial control in fresh boiled herbal shampoos, we strongly recommend conducting a Challenge Test to evaluate the efficacy of the preservative in your actual formula before production and distribution. This ensures the safety and quality of your product.
