Base/Neutral Standard

2,5-Dimethylbenzaldehyd-2,4-dinitrophenylhydrazone, 100mg

2,3-Dibromo-7,8-dichlorodibenzofuran, 1.2ml x 50ug/ml, toluene

n-Perfluoroheptanoic acid, 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 375-85-9