At approximately 4:26 p.m. on August 6, an accident involving a toxic substance leak occurred at the Korea Electronics Technology Institute in Yatap-dong, Bundang-gu, Seongnam, Gyeonggi Province, where hydrazine was released.


Although around 300 people, including staff members who were in the laboratory building, evacuated due to this incident, there have been no reported casualties.


A firefighter is working in chemical protective clothing at the hydrazine leak site. Gyeonggi Fire & Disaster Headquarters

A firefighter is working in chemical protective clothing at the hydrazine leak site. Gyeonggi Fire & Disaster Headquarters

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Hydrazine is a highly toxic chemical used as fuel for rockets and spacecraft. The amount of hydrazine that leaked was found to be about 200 milliliters.


According to firefighters, after a staff member reported that a hazardous substance had been released, they were dispatched to the scene. Wearing chemical protective clothing, they entered the affected laboratory and opened the windows for ventilation. The leaked hydrazine was removed using absorbent pads.



The police and fire authorities believe the accident happened while moving a box containing a glass bottle of hydrazine solution, and are investigating to determine the exact cause of the incident.


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