Trace Elements #4 Back Catalog number: 52328 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 674983 4,4'-DDE, 100mg Price on request 93595 EPA Method 8141 Standard Price on request 11839.21-100MG Diphenylisopropylphenyl phosphate, techn. isomer mixture,neat,neat,100mg, Price on request