EPA Method 8021B Internal Standard Back Catalog number: 19394 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended S-4099-1MLX5 Imbentin-N/060 (n = 2-9) 100mg S-4099 Nonylphenol with 6mol ethyleneoxide Price on request C16173500 Phthalic acid, bis-iso-butyl ester, certified, 0.25g Price on request 674017 Fomesafen, 10.0 µg/ml, Acetonitrile, 10ml Price on request