Potassium chloride (muriate of potash, MOP) under TSCA
KCl · 氯化钾
Status: Listed. Potassium chloride is on the TSCA Inventory and is currently listed as TSCA Active. Light-regulatory profile. NOT on EPA RMP threshold list. NOT on DEA scheduling. NOT on California Proposition 65. NOT on TRI Section 313 list. NO active US AD case on Chinese-origin KCl currently. Section 301 List 3 25% additional duty applies on Chinese-origin KCl (HS 310420). FDA 21 CFR 184.1622 GRAS for food use (low-sodium salt substitute applications). USP monograph for pharmaceutical-grade KCl. **US is structurally net-importer**: ~80% of US KCl demand imported from Canadian Nutrien-Mosaic Saskatchewan capacity (no domestic potash mining at scale; small operations in Carlsbad New Mexico).
The US KCl lane has **light regulatory profile**. Section 301 List 3 25% additional duty applies. **US is structurally net-importer**: ~80% of US KCl demand imported from Canadian Nutrien-Mosaic Saskatchewan capacity. Small US domestic producers in Carlsbad New Mexico. Russia + Belarus war disruption since 2022 reshaping global potash trade.
Listing and threshold
| Substance | Potassium chloride (muriate of potash, MOP) (CAS 7447-40-7), KCl |
|---|---|
| Regime | US Toxic Substances Control Act (TSCA), administered by EPA |
| Jurisdiction | United States of America |
| Status | Listed |
| Tonnage threshold | CDR (Chemical Data Reporting) threshold: 25,000 lb (11,340 kg) manufactured or imported per site per year |
Classifications under this regime
- OSHA Hazard Communication Standard (HCS): not classified at industrial-grade
- NOT subject to TSCA Section 6 Risk Evaluation
- NOT on EPA RMP threshold list
- NOT on DEA List I or List II
- NOT on California Proposition 65 list (verify against OEHHA https://oehha.ca.gov/proposition-65/proposition-65-list before relying on negative listing)
- NOT on TRI Section 313 list
- DOT hazardous materials regulation (49 CFR 172.101): not regulated as DG
- IARC: not assigned
- FDA 21 CFR 184.1622 GRAS for food use; USP pharmacopoeia monograph
Restrictions and conditions of use
- No TSCA-specific use restrictions
- NO active US AD/CVD case on Chinese-origin KCl currently
- Section 301 List 3 25% additional duty applies on Chinese-origin KCl (HS 310420)
- FDA 21 CFR 184.1622 GRAS approval for food use
Importer obligations
Light-regulatory profile. **US is structurally net-importer**: ~80% of US KCl demand imported from Canadian Nutrien-Mosaic Saskatchewan capacity. Major US (small) domestic producers: Compass Minerals (Carlsbad New Mexico) + Intrepid Potash (Carlsbad New Mexico) + Mosaic (Carlsbad New Mexico).
Required documents
- TSCA Section 13 Import Certification statement on customs entry
- Customs entry CBP Form 7501 with HS code 310420 (KCl) and Section 301 List 3 25% duty applied
- FDA 21 CFR 184.1622 GRAS conformity declaration for food-grade lots
- USP pharmacopoeia conformity declaration for pharmaceutical-grade lots
- CDR filing every 4 years if site exceeds 25,000 lb/yr threshold
Common compliance traps
The pitfalls that have bitten importers on this lane in the past. None of these is theoretical.
- **Light-regulatory profile**: NOT on TRI, NOT on Cal Prop 65, NOT on RMP, NOT on DEA, NO active AD
- Section 301 List 3 25% additional duty applies; only tariff-stack layer
- **US is structurally net-importer**: ~80% of US KCl demand imported from Canadian Nutrien-Mosaic Saskatchewan
- Small US domestic producers: Compass Minerals + Intrepid Potash + Mosaic (Carlsbad New Mexico)
- Russia + Belarus war disruption since 2022 has reshaped global potash trade
Where to read next
For substance-level identifiers (formula, molecular weight, SMILES, InChIKey), GHS hazard profile, IMDG transport class, and full sourcing reference for potassium chloride (muriate of potash, mop), see the CAS 7447-40-7 sourcing reference.
For grade-by-grade buying notes, freight maths, supplier-tier pricing, and a worked landed-cost example, the potassium chloride (muriate of potash, mop) cornerstone hub covers the full sourcing chain.
For the structure and history of TSCA, see the TSCA 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
Regulatory
Potassium chloride (muriate of potash, MOP) under REACH
European Union listing status, classifications, importer obligations.
Regulatory
Potassium chloride (muriate of potash, MOP) under IECSC
People's Republic of China listing status, classifications, importer obligations.
Regulatory
Potassium chloride (muriate of potash, MOP) under AICIS
Australia listing status, classifications, importer obligations.
Regulatory
Potassium chloride (muriate of potash, MOP) under K-REACH
Republic of Korea listing status, classifications, importer obligations.
Glossary
TSCA, Toxic Substances Control Act
US federal law that gives the EPA authority to track and restrict the manufacture, import, processing, distribution, and disposal of industrial chemicals.
Referenced in
4 pages across the Sourzi moat
This term shows up in 4 regulatory pages. Sample backlinks per content type below.
Regulatory (4)
Potassium chloride (muriate of potash, MOP) under REACH
European Union compliance profile for Potassium chloride (muriate of potash, MOP).
Potassium chloride (muriate of potash, MOP) under IECSC
People's Republic of China compliance profile for Potassium chloride (muriate of potash, MOP).
Potassium chloride (muriate of potash, MOP) under AICIS
Australia compliance profile for Potassium chloride (muriate of potash, MOP).
Plus 1 more regulatory pages.
Free download
Free PDF: the same MSDS verification template the Sourzi team uses to cross-reference factory documents against TSCA, REACH, AICIS, and CDR before booking.