O-Tolidine Dihydrochloride 0.1% w/v, APHA For Chlorine

APHA for residual chlorine.

Note: UPS considers containers of 2.5L or larger as hazardous, which means a hazardous shipping fee will apply per box.
e.g.: 4x1L does not have a haz fee, but 1x4L does.

Not sure which sizes are most cost-effective for shipping? Just ask us!