中国香港采购需求：中国工厂最优惠价格靛蓝，靛蓝 94%，靛蓝 94% 颗粒，靛蓝 cas 号：482-89-3，还原蓝 1，棉用还原靛蓝 94%

I'm reaching out to inquire about the availability and specifications of indigo blue granular material. We're particularly interested in understanding its chemical composition, particle size, and any relevant certifications or quality standards that meet our requirements. Additionally, could you provide details on the pricing, minimum order quantities, and lead times for delivery? Furthermore, if there are different grades or variations of the indigo blue granular you can offer, please share that information as well. We're looking to establish a reliable partnership for our ongoing projects, so details on bulk purchasing options and payment terms would also be appreciated. Thank you!