ASTM D-4815 Calibration Mix #2 Back Catalog number: 51059 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 682169 (-)-delta-9-THC, 10.0 µg/ml, Methanol, 1ml Price on request 680167 Propionic acid, 1ml Price on request 677133 1-Methylnaphthalene, 250mg Price on request