An industrial chemical accident occurred on 6 August 2013 at the private limited company Concern Stirol JSC, part of Ostchem Holding AG, in the city of Horlivka, Ukraine.
In September 2010, Concern Stirol became part of OSTCHEM holding controlled by Group DF founded and owned by Ukrainian businessman Dmitry Firtash.
[20] Later, Directorate of Civil Protection of Horlivka City Council published information that the accident didn't pose a threat to people.
[16] Later the Horlivka sanitary and epidemiological station confirmed that the maximum permissible concentration of ammonia in air was not exceeded at 500 and 1000 meters from the plant.
[23][24] Also the situation was monitored under the control of the President of Ukraine Viktor Yanukovych[25] During the pipeline inspection a crack length of 10 cm (3.9 in) was revealed, through which ammonia had leaked.
Prosecutor of Horlivka, Oleg Kolesnyk, on the day of the accident said that all causes should be considered, including the human factor, or a violation of a process.
[28] According to the Minister of Environment and Natural Resources, Oleh Proskuryakov, the first conclusions of the Commission on the causes of the accident would be announced by the end of the week.
[31] Head of Donetsk Regional State Administration Andriy Shishatskiy said that there is no reason to panic because the allowable ammonia concentration was not exceeded, and the accident will not affect the work of the plant.