Replacement O-rings for five-position NMR tube cleaner system

4,5-Diamino-6-hydroxypyrimidine hemisulfate salt

4,5-二氨基-6-羟基嘧啶 半硫酸盐

Step stool

Low-profile roller

Slides, microscope

载玻片

Ace European-style three-neck flask

Ace four-neck round-bottom flask

Ace precision-ground shaft

Ace round-bottom flask with threaded side-arm

Aldrich^® cold-finger condenser

Aldrich^® glass reference electrode

Aldrich^® 玻璃参比电极