Dear customer:

       Since the chemical reagents, glass instruments and other products produced and operated by the company are special production materials, return processing is not accepted, so please confirm with the business personnel before purchase, and timely acceptance when receiving the goods.

       If you find that there are quality defects, close to the expiration date and other problems after receiving the goods, please contact the business personnel in the first time (Jiangsu, Zhejiang and Shanghai customers within 7 days after the sale of the goods, other customers within 7 days after receiving the goods). After confirmation by our company, return the goods to our company, and please keep the original packaging of the goods do not damage, the company will replace the goods for you or handle the return procedures.

       We do not accept returns once the following items are sold:

       1）Narcotics and precursor chemicals;

       2）Special orders for you (one in one out goods, customized goods, imported goods);

       3）Commodities whose outer packaging has been seriously contaminated or damaged, or commodities which have been opened;

       4）Goods with quality and damage caused by improper storage or return during transportation;

       5）Hot goods, changeable goods, expiration goods, fragile goods;

       6）Commodities of precious metals and their compounds.

       In addition to the quality defects of the goods sold by our company, the freight of the returned goods and the return freight of the replacement goods are borne by the purchaser.

       In case of special circumstances, we will deal with it at our discretion, and the company reserves the right of final interpretation.

       When you want to return/exchange, please contact the relevant business personnel first.