Preservative Recommendations for Sulfate Free Shampoo Base

For preserving a Sulfate Free Shampoo Base, several broad-spectrum preservatives can be effective. When choosing, consider the pH range of your specific shampoo base.

Here are a few options that are generally suitable:

• Mild Preserved™ COS: This is a broad-spectrum, water-soluble preservative effective in a wide pH range of 2-8. It is odorless and used at 0.75-1.5%.
• Global Guard™ 221: Another broad-spectrum, water-soluble option effective from pH 2-7. It is used at a lower rate of 0.5-1.1%.
• Coco-Preserve™: If you prefer a natural origin preservative, this option derived from coconut extract is broad-spectrum and works in a pH range of 4-8, used at 1-2%. Avoid temperatures above 50°C during mixing.
• NaturePreserve™ LB2: Another natural origin preservative effective against bacteria and fungi, particularly at lower pH values (2.0-6.5). Use at 0.5-1.0%. Avoid temperatures above 50°C.

Important Considerations:

• Always check the pH of your Sulfate Free Shampoo Base to ensure compatibility with the chosen preservative's effective pH range.
• It is highly recommended to perform a challenge test on your final shampoo formulation to confirm the preservative's effectiveness against microbial growth under real-world conditions before widespread production and distribution.