印度采购需求：硫化蓝BRN、液体硫化黑4GN、硫化黑BR 200%、靛蓝、罗丹明B、孔雀石绿（无铅）

I am interested in purchasing 5000 kg of crude sulphur blue brown in pure form, specifically free from any salt impurities. Please provide detailed specifications regarding the product, including its quality standards, production processes, and any relevant certifications that might guarantee its purity. Additionally, I'd like to know the pricing details, including any discounts for bulk purchases, as well as the estimated delivery time to my location. If you have any options for packaging or handling, please include that information as well. Looking forward to your prompt response so we can proceed with the order.