49 CFR 172 Special Provision 166 (Numeric Codes)

These provisions are multi-modal and apply to bulk and non-bulk packagings.

Code	166
Description	When transported in non-friable tablet form, calcium hypochlorite, dry, may be transported as a Packing Group III material.
HazMat with this Code	UN 1748 - Calcium hypochlorite, dry or Calcium hypochlorite mixture dry with more than 39% available chlorine (8.8% available oxygen) UN 3485 - Calcium hypochlorite, dry, corrosive or Calcium hypochlorite mixture, dry, corrosive with more than 39% available chlorine (8.8% available oxygen)