EPA Method 8240A Internal Standard Back Catalog number: 22003 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 94848 Solution #1 Price on request SC-200449 Ibotenic acid, >98%, 1mg Price on request C14464800 1-(4-Isopropylphenyl)-3-methylurea, 100mg Price on request