Massachusetts APH Standard Back Catalog number: 94496 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended EPA-533ES EPA Method 533 Isotope Dilution Standard PDS, 1.2ml, methanol Price on request 3496.12-100-CY Propyzamide Price on request 73791 4-Methyl-1,3-dioxolane Price on request