CAS 7782-50-5 · K-REACH · Republic of Korea

Chlorine (Cl2) under K-REACH

Cl2 · 氯气

Status: Registered. Chlorine is registered under K-REACH and listed as a Priority Existing Chemical (PEC). **Cl2 IS on Korea TCCA Toxic Chemicals list**. NOT on Korean Drug Management Act precursor list. NO active Korean AD/CVD case. Korea has substantial domestic chlor-alkali production at Yeosu (verify each producer-site pair against the producer's public website before relying on a specific kit of plant locations: LG Chem, Hanwha Solutions, Lotte Chemical); structurally balanced on a domestic-supply basis. KCFTA preferential zero-duty applies for Chinese-origin imports (rare due to bulk-trade limitation).

K-REACH treats Cl2 as a routine PEC-registered substance but **TCCA Toxic Chemicals Handling Permit at destination facility is the dominant practitioner overhead**. **Cl2 is structurally NOT internationally traded as bulk**. Korea has substantial domestic chlor-alkali production at Yeosu (LG Chem + Hanwha Solutions + Lotte Chemical). **Chlorine distinguishing pattern across all 5 regimes**: closes NaCl batch 16 chain via chlor-alkali (membrane-cell electrolysis: NaCl + electricity → NaOH batch 1 + Cl2 + H2; ~99% globally) + NaOH batch 1 structural co-product (~1.1 t Cl2 per tonne NaOH) + chlor-alkali integrated chain (~50% Cl2 to PVC batch 10 + HCl batch 4) + Acute Tox. 2 inhalation H330 fatal-if-inhaled + Press. Gas + Skin Corr. 2 + China Highly Toxic Catalog + Korea TCCA + EPA RMP 2,500 lb threshold (verify against 40 CFR 68 Appendix A) + DHS CFATS chemical-of-interest (verify current CFATS programme status against DHS CISA after the July 2023 statutory lapse) + Cl2 structurally NOT internationally traded as bulk + chlorine-specific incident catalogue per CSB.gov (Bhopal 1984 and Texas City 2005 were not chlorine incidents and should not be cited as chlorine disaster legacy).