N-七氟丁酰咪唑 HFBI 酰化试剂，在冰箱-4°C/-20°中保存即可，对水分和潮气非常敏感，在往外移取的过程中会有少量晶体析出，这是由于HFBI与空气中的水分接触发生分解反应引起的，是一种正常现象，不影响实验，建议客户每次使用完对剩余的HFBI氮吹后，拧好盖子，并用封口膜缠绕。如果客户的样品量不多，建议使用小包装的产品5X1g包装，货号为CFCQ-270611There is nothing wrong with material. However， this reagent is very sensitive to air. This is why your customer I seeing white crystals. Even the smallest exposition to air， can make the reagent react. I would recommend to your client to switch to ampoules: 5 x 1gm， Catalog ＃270611. It is more expensive packaging， but it lowers the chances of contamination and there is less need to re-use the same bottle of material.
After packaging this material， we purge it with nitrogen， to make sure the air is removed.