WS Disinfection By-Products - Cal Check 1

1,3-Dimethyl-2-imidazolidinone, 100mg

3-Hydroxy-1H-phenalen-1-one, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 5472-84-4

Phenyl 2-hydroxybenzoate, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 118-58-1