Calcium nitrate first aid measures

Skin contact: Take off contaminated clothing and rinse with plenty of running water.
Eye contact: Lift the eyelids and rinse with running water or saline. Seek medical attention.
Inhalation: Quickly leave the scene to fresh air. Keep airway open. If breathing is difficult, give oxygen. If not breathing, give artificial respiration immediately. Seek medical attention.
Ingestion: Drink plenty of warm water, induce vomiting. Seek medical attention.