We are aware of the minor fluorescent contaminant issue in many of our lipids. In response to this issue, we have developed a chromatography protocol which significantly reduces the fluorescent contaminants. However, there is extra charge associated with the purification (approx. $300 per lipid, regardless of amount of lipid ordered, if less than 10 g). For each item, there will be an additional item number of 999999 which will be associated with each product processing. Please call or email customer service to request this service when placing the order. Customer service can provide a ship date, once the order is received.