A South Korean court sentenced the former head of Oxy Reckitt Benckiser to seven years in prison Friday after the company's disinfectant for humidifiers killed scores of people and left hundreds with permanent lung damage.

The Seoul Central District Court ruled that Shin Hyun-woo, Oxy chief from 1991-2005, was guilty of accidental homicide and falsely advertising the deadly product as being safe even for children. Seven years is the maximum prison term the court could issue.

Choi Chang-young, chief judge of the case, said the disaster could have been prevented if Shin and others in the company, a subsidiary of British consumer goods company Reckitt Benckiser Group Plc, had tried to ensure the chemicals' safety.