CAS 71-36-3 · K-REACH · Republic of Korea

n-Butanol (butan-1-ol) under K-REACH

C4H10O · 正丁醇

Status: Registered. n-Butanol is registered under K-REACH and listed as a Priority Existing Chemical (PEC). NOT on Korea TCCA Toxic Chemicals list. NOT on Korean Drug Management Act precursor list. NO active Korean AD/CVD case on Chinese-origin n-butanol. Korea has substantial domestic n-butanol production at Yeosu plus Daesan (LG Chem, Lotte Chemical, Hanwha Solutions oxo-alcohol capacity); structurally balanced. KCFTA preferential zero-duty applies for Chinese-origin imports.

K-REACH treats n-butanol as a routine PEC-registered substance with no TCCA overlay. Korea has substantial domestic n-butanol production at Yeosu plus Daesan oxo-alcohol capacity. NO active Korean AD/CVD case. **n-Butanol distinguishing pattern across all 5 regimes**: oxo-process from propylene batch 53 plus syngas / CO plus H2 production route (~85 percent globally; via n-butyraldehyde hydrogenation) plus fermentation route (~5 percent declining; ABE process legacy) + n-butyl acetate batch 24 ester chain (~30 percent of demand) + butyl acrylate ester chain (~25 percent) + glycol ethers / butyl glycols (~15 percent) + plasticiser intermediates (~15 percent) + solvent applications (~15 percent) + sister to 2-ethylhexanol oxo-alcohol chain + 13% China VAT export rebate.

Listing and threshold

Substance n-Butanol (butan-1-ol) (CAS 71-36-3), C4H10O
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: Flam. Liq. 3 (H226), Acute Tox. 4 oral (H302), Skin Irrit. 2 (H315), Eye Dam. 1 (H318), STOT SE 3 (H335 plus H336)
  • Signal word: DANGER. GHS pictograms: GHS02 + GHS05 + GHS07
  • KOSHA workplace exposure standard: 25 ppm 8-hr TWA, ceiling 50 ppm
  • NOT on Korea TCCA Toxic Chemicals list
  • NOT on Korean Drug Management Act precursor list
  • Korean Customs Service (KCS) HS code: 290513
  • IARC: Group 3

Restrictions and conditions of use

  • No TCCA Toxic Chemicals Handling Permit required
  • KOSHA MSDS in Korean required at workplace
  • NO active Korean AD/CVD case on Chinese n-butanol currently
  • KCFTA preferential zero-duty applies (HS 290513)

Importer obligations

Korean importer of record must hold K-REACH registration. Korea has substantial domestic n-butanol production at Yeosu plus Daesan oxo-alcohol capacity.

Required documents

  • K-REACH registration number on Korean side
  • Korean MSDS reflecting H226 / H302 / H315 / H318 / H335 / H336
  • KCS declaration with HS 290513
  • 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.

  • Korea has substantial domestic n-butanol production at Yeosu plus Daesan
  • KCFTA preferential zero-duty applies
  • NO active Korean AD/CVD case
  • NOT on TCCA Toxic Chemicals list

Where to read next

For substance-level identifiers (formula, molecular weight, SMILES, InChIKey), GHS hazard profile, IMDG transport class, and full sourcing reference for n-butanol (butan-1-ol), see the CAS 71-36-3 sourcing reference.

For grade-by-grade buying notes, freight maths, supplier-tier pricing, and a worked landed-cost example, the n-butanol (butan-1-ol) 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

4 pages across the Sourzi moat

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Regulatory (4)

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