英国采购需求：酪蛋白酸钠 素食，甜味剂

I'm looking to source high-quality alkalised cocoa powder in 25kg bags for our production needs. We are particularly interested in the characteristics of the cocoa powder, such as its flavor profile, color, and fat content. Additionally, please provide details on the sourcing process, including any certifications or quality assurance measures your facility adheres to. Also, it would be great to understand your pricing options and lead times for delivery. We are assessing potential suppliers for a long-term relationship, so any information on bulk purchasing discounts would also be appreciated. If you could send over your product specifications along with relevant samples, that would help us make a more informed decision.