CAS 1313-13-9 · K-REACH · Republic of Korea

Manganese dioxide (MnO2) under K-REACH

MnO2 · 二氧化锰

Status: Registered. Manganese dioxide is registered under K-REACH. NOT on Korea TCCA Toxic Chemicals list at MnO2 level (verify against the current TCCA Toxic Chemicals list at https://www.nics.go.kr/ before relying). NO active Korean AD/CVD case on Chinese-origin manganese dioxide currently (verify against current Korean Trade Commission AD case list at https://www.ktc.go.kr/ before relying). KCFTA preferential zero-duty applies for Chinese-origin imports. **Korea is a significant manganese-dioxide consumer market** (Korean alkaline + Zn-C battery sector + ferromanganese steel via POSCO) with significant Chinese-origin and Japanese-origin import dependency.

K-REACH treats manganese dioxide as a routine registered substance with no TCCA overlay. KCFTA preferential zero-duty. NO active Korean AD/CVD. **MnO2 distinguishing pattern across all 5 regimes**: Production as electrolytic (EMD, gamma-MnO2 from MnSO4 electrolyte) or chemical (CMD, beta-MnO2 / pyrolusite); ~70 to 80% of global EMD consumption is alkaline + Zn-C dry-cell battery cathode + ~10 to 15% ferromanganese steel deoxidiser / desulfuriser smelting + ceramic colorant + pigment umber + organic-synthesis oxidant + water-treatment oxidiser downstream chains; **historical US AD/CVD A-570-919 / C-570-920 on Chinese-origin EMD + EU AD Reg (EC) No 221/2008 + successor measures (verify current cash-deposit rate per producer against access.trade.gov + EUR-Lex)**; mid hazard profile (Acute Tox. 4 oral + Acute Tox. 4 inhalation + STOT RE 1 nervous-system / lungs reflecting manganese-induced neurotoxicity / "manganism"); IARC manganese + inorganic Mn compounds NOT separately classified; OSHA PEL 5 mg/m3 ceiling Table Z-1 + ACGIH TLV-TWA + Safe Work Australia WES + Korean MoEL OEL all 0.02 mg/m3 respirable Mn (revised low); NOT regulated as dangerous goods at solid form; major non-Chinese producers Tronox / Cristal (Australia Woodie Woodie WA EMD) + Tosoh (Japan Yamaguchi) + Mitsui (Japan) + South32 (Australia Groote Eylandt NT + South Africa Hotazel) + Element 25 (Australia Butcherbird WA) + Erachem Comilog (Belgium + USA Baltimore); **China is the dominant global producer of EMD** (Citic Dameng Mining Guangxi Daxin + Guizhou Redstar Developing + Hunan Tongren + Xiangtan Electrochemical Scientific + Guangxi Tianyuan).

Listing and threshold

Substance Manganese dioxide (MnO2) (CAS 1313-13-9), MnO2
Regime Korea Act on the Registration and Evaluation of Chemicals (Act No. 11789, "K-REACH" amended 2018)
Jurisdiction Republic of Korea
Status Registered
Tonnage threshold K-REACH registration required for existing chemicals manufactured or imported >1 tonne/year (verified per Korean Ministry of Environment / NIER guidance, https://chemical.chemlinked.com/chempedia/k-reach; threshold for new substances was reduced from 0.1 t/y to 1 t/y effective 1 January 2025 per K-REACH 2025 amendment)

Classifications under this regime

  • Korean GHS classification: Acute Tox. 4 oral + Acute Tox. 4 inhalation + STOT RE 1 nervous-system / lungs (verify against current MoE / NIER GHS before relying)
  • NOT on Korea TCCA Toxic Chemicals list at MnO2 level (verify against the current TCCA Toxic Chemicals list at https://www.nics.go.kr/ before relying)
  • Korean Customs Service (KCS) HS code: 282010
  • **Korean MoEL OEL: 0.02 mg/m3 respirable + 0.1 mg/m3 inhalable for manganese typically (verify against current MoEL Industrial Safety + Health Act OEL list at https://www.moel.go.kr/ before relying; revised low reflecting manganese-induced neurotoxicity)**
  • IARC: Manganese and inorganic manganese compounds NOT separately classified

Restrictions and conditions of use

  • No TCCA Toxic Chemicals Handling Permit required at MnO2 level
  • KOSHA MSDS in Korean required at workplace (Acute Tox. 4 + STOT RE 1 nervous-system / lungs)
  • NO active Korean AD/CVD case on Chinese-origin manganese dioxide (verify against current Korean Trade Commission case list)
  • KCFTA preferential zero-duty applies (HS 282010)

Importer obligations

Korean importer of record must hold K-REACH registration. **Korea structurally net-importer of MnO2** for alkaline + Zn-C battery sector + POSCO ferromanganese steel; primary sources China (Citic Dameng + Guizhou Redstar + Hunan Tongren + Xiangtan Electrochemical + Guangxi Tianyuan) + Japan (Tosoh Yamaguchi + Mitsui).

Required documents

  • K-REACH registration number on Korean side
  • Korean MSDS (Acute Tox. 4 oral + Acute Tox. 4 inhalation + STOT RE 1 nervous-system / lungs)
  • KCS declaration with HS 282010
  • China-Korea FTA Form CO

Common compliance traps

The pitfalls that have bitten importers on this lane in the past. None of these is theoretical.

  • NOT on TCCA Toxic Chemicals list at MnO2 level
  • KCFTA preferential zero-duty applies
  • NO active Korean AD/CVD case on Chinese-origin MnO2
  • Korean MoEL OEL 0.02 mg/m3 respirable Mn (revised low reflecting manganese-induced neurotoxicity / "manganism")
  • Korea structurally net-importer; primary sources China + Japan
  • **Korean alkaline + Zn-C battery sector + POSCO ferromanganese steel + ceramic / pigment downstream chains**

Where to read next

For substance-level identifiers (formula, molecular weight, SMILES, InChIKey), GHS hazard profile, IMDG transport class, and full sourcing reference for manganese dioxide (mno2), see the CAS 1313-13-9 sourcing reference.

For grade-by-grade buying notes, freight maths, supplier-tier pricing, and a worked landed-cost example, the manganese dioxide (mno2) cornerstone hub covers the full sourcing chain.

For the structure and history of K-REACH, see the K-REACH glossary entry.

Need cross-jurisdiction compliance support on this substance? Run it through the REACH / TSCA / IECSC / AICIS / K-REACH checker, or send us the substance and the destination and we will quote FOB China and CIF / DDP landed including the regulatory work on the destination side.

Read next

Cross-jurisdiction profile and sourcing references

Referenced in

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