Calcium Hardness

Di-iso-nonyl phthalate in mixture with C8-10-branched alkyl o-phthalate , C9-rich, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 68515-48-0

EPA Method 551.1 Internal Standard

(2RS)-2-(4-Ethylphenyl)propanoic acid, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 3585-52-2