Total Dissolved Solids Back Catalog number: 54325 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 678535 4-Chlorophenoxyacetic acid, 100 µg/ml, Acetonitri Price on request 0957.14-500-IO 1,3-Dimethyldibenzothiophene, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 31317-15-4 Price on request 11156.7-10MG Perfluoroheptane sulfonic acid, potassium salt,neat,neat,10mg, Price on request