CAS 7783-28-0 · K-REACH · Republic of Korea

Diammonium phosphate under K-REACH

(NH4)2HPO4 · 磷酸二铵

Status: Registered. Diammonium phosphate is registered under K-REACH and listed as a Priority Existing Chemical (PEC). Korea has NO domestic phosphate-rock deposits and is structurally net-importer of DAP. The Korean Rural Development Administration (RDA) operates a Fertiliser Quality Control system separate from K-REACH for fertiliser-product-specific compliance. Korean farming demand is structural; KCFTA preferential zero-duty supports Chinese-origin supply alongside Saudi Arabian and Moroccan alternatives.

K-REACH treats DAP as a routine PEC-registered substance with no TCCA overlay. Korea is structurally net-importer of DAP (no domestic phosphate-rock deposits). Korean Rural Development Administration (RDA) Fertiliser Quality Control standard is the dominant fertiliser-product-specific compliance layer separate from K-REACH chemical registration. KCFTA preferential zero-duty supports Chinese-origin supply alongside Saudi Arabian (Ma'aden), Moroccan (OCP), and Russian (PhosAgro / Acron) alternatives. Korean farming demand peaks Mar-May (spring application) and Sep-Oct (autumn application); Beijing Chinese seasonal export-quota tightening (Feb-May) overlaps with Korean spring-application demand peak, making secondary supply origins (Saudi, Morocco, Russia) operationally important. National Agricultural Cooperative Federation (NongHyup) is dominant Korean farmer-level distribution channel; Dongbu Hannong and Namhae Chemical compete in commercial-grade segment.

Listing and threshold

Substance Diammonium phosphate (CAS 7783-28-0), (NH4)2HPO4
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: typically NOT classified as hazardous (dust irritation only)
  • Korea Occupational Safety and Health Act (KOSHA) workplace exposure standard for nuisance dust: 10 mg/m³ TWA inhalable
  • NOT on Korea TCCA Toxic Chemicals list
  • NOT on Korea Drug Management Act precursor list
  • Korean Customs Service (KCS) HS code: 31053000
  • Listed in K-REACH database under "general industrial use, low-hazard"
  • NOT classified as carcinogen, mutagen, or reproductive toxicant under Korean GHS
  • Korean Rural Development Administration (RDA) Fertiliser Quality Control standard applies: P2O5 minimum 46%, N minimum 18%, granule hardness, dust

Restrictions and conditions of use

  • No TCCA Toxic Chemicals Handling Permit required
  • No Chemical Accident Prevention Plan (CAPP) required
  • Korea Industrial Safety and Health Act (KOSHA) MSDS in Korean required at workplace
  • Korea Customs Service requires K-REACH registration number on import declaration
  • No active Korean AD/CVD case on Chinese-origin DAP currently
  • KCFTA preferential zero-duty applies to Chinese-origin DAP (HS 31053000); verify producer-specific eligibility (Form CO certified by Chinese authority)
  • Korean Rural Development Administration (RDA) Fertiliser Quality Control standard certification required for fertiliser-product registration
  • No Korean federal cadmium content limit on DAP; market-driven specifications apply

Importer obligations

The Korean importer of record must hold K-REACH registration in their own name or rely on an Only Representative (OR). Korea has NO domestic phosphate-rock deposits and is structurally net-importer of DAP. The Korean Rural Development Administration (RDA) Fertiliser Quality Control system applies separately for fertiliser-product-specific registration. KCFTA preferential zero-duty supports Chinese-origin supply alongside Saudi Arabian (Ma'aden), Moroccan (OCP), and Russian (PhosAgro / Acron) alternatives. Korean farming demand (rice, vegetables, fruit) is structural with seasonal demand peaks Mar-May (spring application) and Sep-Oct (autumn application).

Required documents

  • K-REACH registration number on Korean side (registrant or OR-appointed)
  • Korean-language MSDS compliant with Korean GHS
  • Korean Customs Service (KCS) declaration with HS code 31053000
  • China-Korea FTA Form CO certificate of origin for preferential treatment
  • P2O5 minimum 46%, N minimum 18% specification certificate (per Korean RDA Fertiliser Quality Control standard)
  • Korean Rural Development Administration (RDA) Fertiliser registration certificate (where required for fertiliser-product commercialisation)
  • Cadmium content certification (where buyer requires; no Korean federal limit but market-driven specs)

Common compliance traps

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

  • Korean GHS hazard-statement codes use H-codes mapped to Korean translations; SDS in English-only is rejected at workplace inspection
  • Korea has NO domestic phosphate-rock deposits; structurally net-importer of DAP; Chinese, Saudi, Moroccan, Russian supply origins compete on price and grade
  • KCFTA preferential zero-duty applies but verify producer-specific eligibility (Form CO certified by Chinese authority)
  • Korean Rural Development Administration (RDA) Fertiliser Quality Control standard is the dominant fertiliser-product-specific compliance layer separate from K-REACH chemical registration
  • No Korean federal cadmium content limit on DAP; market-driven specs apply, with some Korean buyers preferring lower-Cd Russian or Moroccan supply for export-grade applications
  • Korean farming demand: rice (dominant crop), vegetables (greenhouses), fruit (orchards). Application season peaks Mar-May (spring) and Sep-Oct (autumn). Beijing Chinese seasonal export-quota system (Feb-May tightening) overlaps with Korean spring-application demand peak; secondary supply origins (Saudi, Morocco, Russia) become operationally important during Chinese export-quota tightening
  • Korean fertiliser distribution: National Agricultural Cooperative Federation (NongHyup) is dominant channel for farmer-level DAP distribution; private distributors (Dongbu Hannong, Namhae Chemical) compete in commercial-grade segment

Where to read next

For substance-level identifiers (formula, molecular weight, SMILES, InChIKey), GHS hazard profile, IMDG transport class, and full sourcing reference for diammonium phosphate, see the CAS 7783-28-0 sourcing reference.

For grade-by-grade buying notes, freight maths, supplier-tier pricing, and a worked landed-cost example, the diammonium phosphate 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.

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Cross-jurisdiction profile and sourcing references

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