Merck Total hardness-test test rods, individually sealed, 4 reactrion zones, 1000 pc, method: colorimetry with teststäbchen <3 - >4 - >7 - >14 - >21°d

Please take note of the Safety Data Sheet http://www.merckmillipore.com/INTERSHOP/web/WFS/Merck-INTL-Site/en_US/-/USD/ShowDocument-File?ProductSKU=MDA_CHEM-110032&DocumentType=MSD&Language=EN&Country=GB