孟加拉采购需求：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'm reaching out regarding the availability of a specific chemical product, Sulphur dark brown GD, which I've identified as being accessible in Bangladesh. I'm interested in understanding your current stock levels, pricing options, and any other relevant details you can provide. Additionally, please let me know about the shipping process to ensure timely delivery, as well as any bulk purchase discounts that might be available. It's important for us to establish a reliable supply chain, so I'd appreciate details on the quality standards and certifications associated with your product. Looking forward to your prompt response!