Compatibility and Staining of Brilliant Blue (CI42090) in Hand Sanitizer

Regarding your question about using Brilliant Blue, Blue No.1 (CI42090) (Water-Soluble) in hand sanitizer:

1. Compatibility with Alcohol

Yes, this color can be used in hand sanitizers. Although it is water-soluble, it can dissolve well in alcohol-based formulas (Ethanol or IPA) that contain a water component (usually 25-30% water in a 70-75% alcohol formula).

2. Staining Concern

The standard Brilliant Blue, Blue No.1 (CI42090) (Water-Soluble) is a highly concentrated primary color. If used in a hand sanitizer (which is a leave-on product), there is a high risk that the color will stain the hands or skin, especially if the concentration is too high.

Recommendations:

• To avoid staining: We highly recommend using Brilliant Blue (CI42090) EasyWash™ instead. This version is specifically designed not to stick to the skin or surfaces, making it much more suitable for leave-on products like hand sanitizers.
• UV Protection: Since CI 42090 has moderate UV resistance, the color may fade over time if exposed to light (especially in clear packaging). It is recommended to add ActiveProtec™ UV to the formula to help stabilize the color and prevent fading.
• Usage Rate: Use a very small amount. Start with a tiny drop or a very small pinch and gradually increase until you reach the desired shade. Over-coloring increases the risk of staining.

In summary, while the standard version can be mixed, the EasyWash™ version is the better choice for hand sanitizers to ensure the color does not remain on the user's hands after use.