QC Standard 4 Back Catalog number: 52087 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended S-4367-100-5DC EPA 528 rev. 1.0 Internal Standard Solution 1 100µg/mL in dichloromethane; unit: 1x5mL 3841.8 1,2-Dimethyl-3-nitrobenzene [83-41-0] Price on request 71389 n-Butylamine Price on request 676706 PSA-GCB-Mix for 2007.01 per AOAC Price on request