Internal Standard Back Catalog number: 93185 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11082.7-100MG 2,4-Dimethylpyridine,neat,neat,100mg, Price on request 11084.7-100MG 2,6-Dimethylpyridine,neat,neat,100mg, Price on request 83600 EPA Method 555 Herbicide Standard Price on request