How to source from a direct Totarol manufacturer for Totarol white powder?

We are a dermocosmetic brand based in Europe, currently scaling up our anti-acne and sensitive skincare lines. We need to secure a stable supply chain for high-purity cosmetic active ingredients. Specifically, we are looking for a direct Totarol manufacturer that can consistently provide high-quality Totarol white powder. It is crucial that the supplier can meet stringent cosmetic formulation standards, provide complete testing documentation, and ensure lot-to-lot consistency for our scale-up production. What guarantees and technical specifications can your factory offer for this specific raw material?