The vendor will also need to specify all chemical substances and relevant dangers and precautions on the product surface to provide consumers with the right information prior to purchase.

The move comes after 73 South Koreans died from inhaling air from a household humidifier that was regularly cleaned with an anti-bacterial liquid containing polyhexamethylene guanidine. PHMG can be fatal when it's inhaled in the form of droplets.

The scandal, which put its British maker Reckitt Benckiser under intense scrutiny amid huge public fury, is still ongoing with criminal trials for ex-officials and a slew of compensation suits under way. At least 181 South Koreans are known to have been affected by the deadly chemical.

Part of the revised rules has also toughened registration procedures for every home-produced or imported chemical to ensure their safe use and distribution, which will take effect from July next year, according to the ministry. (Yonhap)