Calcium Hardness

Arochlor 1254, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 11097-69-1

Betulin, 600µg/mL, Solvent-diisopropyl ether, Unit 1mL, # of units-5, Cas.no. 473-98-3

Trichloronate, 100 µg/ml, Ethyl acetate, 5ml