乌干达采购需求：皮革化学品、化学固化、精细化学品、漆皮、生皮、生皮化学品

We are inquiring about the availability and pricing for Basic Chromium Sulphate, specifically for tanning hides and skins. We are looking for a green powder variant with Cr2O3 content around 25% +/- 1% and a basicity of 33.33%. The pH of the solution should range from 2 to 4, and we need it to be sulfur reduced. Please propose packaging options, such as paper or PP bags with an inner plastic liner. Additionally, we require Sodium Sulphide for tanning purposes, preferably in yellow solid flakes with a concentration over 60% and iron content around 70%. Kindly provide detailed specifications, including lead times and minimum order quantities.