EPA Method 507 - Internal Standard Back Catalog number: 19031 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10632.12-50-NN 2,3,4,7,8-Pentabromodibenzofuran,50 µg/mL,n-nonane,1mL, Price on request 681584 2,3-Dichloropropionic acid, 100mg Price on request 8941.10-100MG Coniferaldehyde, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 458-36-6 Price on request