EPA Method 8150/1658 Herbicide Methyl Derivatives

Ethylbenzene

Isocaffeine (1,3,9-Trimethylxanthine),neat,neat,100mg,

GC-IRMS Standards (C15 (?13C: -30.22); C20 (?13C: -33.06); C25 (?13C: -28.21)), 150µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-5, Cas.no.