Carcinogenicity (Category 1). May cause cancer (H350). Obtain special instructions before use (P201). Do not handle until all safety precautions have been read and understood (P202). Use personal protective equipment as required (P281). : Acute toxicity, oral (Category 4). Harmful if swallowed (H302). Do not eat, drink or smoke when using this product (P270). Sensitization, skin and respiratory (Category 1). May cause an allergic skin reaction or asthma symptoms or breathing difficulties if inhaled (H317+H334). Avoid breathing dust or fumes (P261). Germ cell mutagenicity (Category 2). Suspected of causing genetic defects (H341). Reproductive toxicity (Category 1). May damage fertility or the unborn child (H360). Cobalt chloride, as a solid, is a known human carcinogen (IARC-1).