為實驗者效勞
Benzaldehyde CAS:100-52-7
1L
Barium chloride 2-hydrate CAS:10326-27-9
Potassium permanganate
CAS：7722-64-7
Diethylene glycol monoethyl ether CAS: 111-90-0
Barium acetate CAS: 543-80-6
