Multi-Element Internal Standard Back Catalog number: 59502 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3818.18-50-DRIED Senecionine,50 µg/mL,dried down,1mL, Price on request 71896 3-Methylcatechol Price on request 674941 Benzyltrimethylammonium chloride, 100mg Price on request