EPA Method 524 & 624 - Internal Standard Back Catalog number: 19794 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2791.13-100-AN 4,4'-Methylenebis (2-chloroaniline),100 µg/mL,acetonitrile,1mL, Price on request 677548 Ethylhexyl triazone, 100mg Price on request C183490 Cariprazine, 10mg Price on request