Surrogate Standard Back Catalog number: 97935 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended DF-IS-H Mass-Labelled PCDF Internal Standard Solution, 1.2ml, nonane Price on request DF-IS-E40 Mass-Labelled PCDF Internal Standard Solution, 1.2ml, nonane Price on request 31101 Chlorobenzene Price on request