Alkali-Resistant Red Color for Glycerin Soap
Asked by: talktosoapcafe
On: August 06, 2025
Product Type:
Cosmetics
Question
What red colorants are recommended for use in glycerin soap formulations, specifically those that exhibit high alkali resistance to maintain color stability in an alkaline environment?
Answer
For an alkali-resistant red color for glycerin soap, we recommend Beta-Carotene Red Color (Natural Colorant).
- Beta-Carotene Red Color (Natural Colorant) is an orange color derived from beta-carotene, a water-soluble natural colorant. It can be used to impart color to various products. Generally, beta-carotene is stable across a range of pH environments. However, for glycerin soap, which is typically alkaline, we recommend conducting stability tests on the color in your specific formulation to ensure the color remains as desired.
If you require a red color with exceptionally high alkali resistance, synthetic pigments often offer better stability in alkaline conditions. However, we do not have specific information on synthetic red pigments explicitly noted for high alkali resistance from the current search results.
