49 CFR 172 Special Provision 165 (Numeric Codes)

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

Code	165
Description	These substances are susceptible to exothermic decomposition at elevated temperatures. Decomposition can be initiated by heat, moisture or by impurities (e.g., powdered metals (iron, manganese, cobalt, magnesium)). During the course of transportation, these substances must be shaded from direct sunlight and all sources of heat and be placed in adequately ventilated areas.
HazMat with this Code	UN 3486 - Calcium hypochlorite mixture, dry, corrosive with more than 10% but not more than 39% available chlorine UN 2208 - Calcium hypochlorite mixture, dry, with more than 10% but not more than 39% available chlorine 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) UN 2880 - Calcium hypochlorite, hydrated or Calcium hypochlorite, hydrated mixture, with not less than 5.5% but not more than 16% water UN 3487 - Calcium hypochlorite, hydrated, corrosive or Calcium hypochlorite, hydrated mixture, corrosive with not less than 5.5% but not more than 16% water