ASTM D-4815 Calibration Mix #1

alpha alpha alpha (24R)-4 alpha-Methyl-24-ethylcholestane, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 53596-90-0

4-n-Octylphenol-mono-ethoxylate, 10mg

Boron (B)