EPA Method 624 Standard Back Catalog number: 41121 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended CFN99171 Astragaloside IV, >98%, 20mg Price on request 98613 Dacthal Price on request 2809.11-100-IO 8-Methyl-2-naphthol, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 19393-87-4 Price on request