Caffeine, 1000µg/ml in MeOH, 1ml

ASTM D 5291, Set of standards Standards suitable for calibration for C,H,N of petroleum products: ASTM D5291grade Acetanilide, 99+% Atropine (sulphate monohydrate), 98.5% Benzoic acid, 99.6% Cystine, 99% Diphenyl, 99% EDTA, 99.0% Imidazol, 99+% N

2-Amino-5-nitrophenol, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 121-88-0

Estriol, 10 µg/ml, Acetonitrile, 10ml