Beijing, Aug 20 (IANS): The chemicals stored at a warehouse in China's Tianjin city where two explosions occurred last week have been identified, a media report said on Thursday.

He Shushan, vice mayor of Tianjin said the warehouse had stored about 40 substances across seven categories, including 1,300 tonnes of oxide compounds, mainly potassium nitrate and ammonium nitrate; 500 tonnes of inflammable materials, consisting of metallic sodium and magnesium and 700 tonnes of highly toxic substances, mainly sodium cyanide, People's Daily reported.

He also added that caffeine was also found at the site.

Most of the chemicals were detected at the core area of the blast site, around which cofferdams have been installed to reduce the risk of contamination, he said.

About 100 kg of chemicals were detected within a three-km radius of the core blast site, he said.

So far, 150 tonnes of sodium cyanide has been removed from the core blast area and sent to its manufacturer to be processed, he said.

A total of 114 people have been confirmed dead, and 57 remain missing after two huge explosions on August 12 at the warehouse that held hazardous chemicals.