Method 200.8/1638/1640 Internal Standard Back Catalog number: 53145 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0674.19-100-IO 5 alpha(H)-Androstane, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 438-22-2 Price on request 10894.10-100-ME 4-Hydroxysulfadiazine,100 µg/mL,MeOH,1mL, Price on request 11919.13-100MG Ambroxol hydrochloride,neat,neat,100mg, Price on request