The term "phase-in substance" means any of the following chemical substances:

(a) Chemical substances publicly notified by the Minister of Environment in consultation with the Minister of Employment and Labor, which were domestically distributed for commercial purposes before February 2, 1991;

(b) Chemical substances publicly notified by the Minister of Environment and where the hazard reviews thereof have been conducted pursuant to the former Toxic Chemicals Control Act after February 2, 1991;

(c) The term "non-phase-in substance" means all chemical substances excluding phase-in substances;Registration of chemical Substances

What is “phase-in substance subject to registration”

The term “phase-in substance subject to registration” means a chemical substance publicly notified by the Minister of Environment after deliberation by the Chemical Substance Evaluation Committee under Article 7 where the Minister deems such chemical substance required to be registered for hazard reviews under Article 18 or risk assessments under Article 24 among existing chemical substances

The number of phase-in substance subject to registration is total 510.