Internal Standard ASTM D-5307 Back Catalog number: 51124 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C175370 Cannabigerol, 5mg Price on request 9461.10-100K-ME Spermine, 100mg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 71-44-3 Price on request 98529 4,4’-Diamino-3,3’-dimethyldiphenylmethane Price on request