Ingredient Stability Information

Here is information regarding the pH and temperature stability for the ingredients you asked about:

1. Calendula Extract (Certified Organic)

Based on the information for Calendula Extract (Water Soluble), the suitable pH range is typically 5.5-6.5. It is recommended to avoid heat and mix this ingredient into the cosmetic formulation at room temperature or cooler.

For long-term storage, it should be kept in the refrigerator at 5°-15°C, away from sunlight or heat.

2. Hydrolyzed Proteins (Quat)

For Hydrolyzed Soy Protein (Quat), Hydrolyzed Wheat Protein (Quat), and Hydrolyzed Silk Protein (Quat), the suitable pH range is generally around 5.5-7. Similar to Calendula Extract, it is best to avoid heat when incorporating these proteins into your formulation. Mixing them at room temperature or cooler is recommended.

While a specific product matching "Hydrolyzed Soy Protein (Quat)" was not found in the search, the general guidance for hydrolyzed proteins applies.

For Hair Wheat Protein (Hydroxypropyltrimonium Hydrolyzed Wheat Protein), note that it has a positive charge and should not be used with anionic detergents in shampoo formulas; non-ionic detergents should be used instead.

For Hydrolyzed Silk Protein (Sericin, Powder, High Nitrogen) and Hydrolyzed Silk Protein (Sericin, Powder, Deodorized), they are mixed in the water phase and stored at room temperature away from sunlight or heat. As natural proteins, they require sufficient preservatives in formulations.