11.   Very little research has been done on sodium azide.

12.   When the bag is activated, sodium azide is detonated, and the resulting effusion of nitrogen gas inflates the bag.

13.   Japanese police arrested a former accountant Thursday for allegedly putting sodium azide, a poisonous chemical, into green tea that sickened nine co-workers last August, authorities said.

14.   Police have identified the toxic substance as sodium azide, a chemical used in many industrial products, including air-bags.

15.   Sodium azide is often used as a preservative, for example to curb the growth of germs in urine samples.