1,4-Naphthoquinone Back Catalog number: X9138 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 680442 alpha-HCH, 100 µg/ml, Methanol, 1ml Price on request 54009 Orthophosphate (as PO43-) Price on request ACQ-AQ02-030 Ethanol standard in water,0.2g/L,water, 3mL Price on request