What is the cause of the explosion in Tanggu, Tianjin?

1. After investigation, the direct cause of the accident was that the nitrocellulose in the container on the south side of the arrival area of the dangerous goods warehouse of Hairui Company was partially dried due to the loss of wetting agent, which was accelerated to decompose and release heat under the action of high temperature (weather) and other factors, resulting in the burning of dangerous chemicals such as nitrocellulose in adjacent containers for a long time and in a large area, leading to the explosion of dangerous chemicals such as ammonium nitrate accumulated in the arrival area.

2. The final result identified by the investigation team is that Hairui Company has seriously violated relevant laws and regulations and is the main responsible unit for the accident. The company ignored the main responsibility of safety production, seriously violated the overall urban planning of Tianjin and the regulatory detailed planning of Binhai New Area, illegally built a dangerous goods yard, illegally operated and illegally stored dangerous goods, and the safety management was extremely chaotic, with long-standing safety hazards.