ASTM D 5623 Sulfur Compounds Standard III, Dimethylbenzothiophenes 5 Analytes each approximately 500µg/mL each in isooctane; unit: 1x1mL 0952.10 2,3-Dimethylbenzothiophene 0953.10 2,4-Dimethylbenzothiophene 0954.10 2,5-Dimethylbenzothiophene 0