Oxytetracycline, 1000μg/ml in MeOH, 1ml

Tris(4-tert-butylphenyl) phosphate, 1.2ml x 50ug/ml, toluene

2-Methyl-4-nitronaphthalene, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 13615-38-8

3,3’-Dimethylbenzidine