Sigma-Aldrich
18-Crown-6
18-冠醚-6
1-Naphthalenesulfonic acid
1-萘磺酸
N-Ethyl-o-crotonotoluidide
克罗米通
Duran® Erlenmeyer narrow-neck flasks
Duran® Erlenmeyer wide-neck flask
Duran® filtering flask
Duran® graduated laboratory bottles, without caps
Duran®带刻度的实验室瓶,无盖
Duroplan petri dishes
Easy-Read® thermometer
Molymod® Atoms and Bonds