An explosion rocks the Binhai New Area in north China's Tianjin Municipality at around 11:30 pm on Aug 12, 2015.

There is a list of some of the chemicals that Ruihai says that it was authorized to handle at the warehouse on its website. There are several kinds of merchandise: CALCIUM CARBIDE, SODIUM NITRATE, AMMONIUM NITRATE, POTASSIUM NITRATE, SODIUM CYANIDE, etc. 
SODIUM CYANIDE is detected at site as the mainly toxic substance.
SODIUM CYANIDE: Noncombustible but it will forms flammable gas when it contact with water or damp air, it gives off pungent or toxic fumes in a fire. If people contact amount of crystal form of cyanide could lead to convulsions, loss of consciousness, low blood pressure, respiratory failure leading to slow heart rate or death.

When we heard this, Shenyang Baianda decided to donate 500 sets Chemical Cartridge Respirators (worthy about RMB200,000). According to these kinds of contaminants, the Chemical Cartridge Respirators include FEA02 half mask , 3503 Multi-type cartridges, and P100 particulate filters, which will protect the people to be safety.

The Chemical Cartridge Respirators which Shenyang Baianda donated were transported to Tianjin on Aug 16. Baianda staff trained the wearers on proper using of Chemical Cartridge Respirators at site.