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☠️ Potassium Cyanide (KCN) – High-Risk Hazardous Material Guide
🌐 HS Code Reference & Customs Clearance Strategy | 2026 Regulatory Landscape | Critical Compliance Protocol
⚠️ EXTREME CAUTION: Potassium Cyanide is a highly toxic, regulated chemical. Improper classification or documentation can lead to immediate seizure, heavy fines, criminal prosecution, or shipment rejection. This guide focuses on strict compliance to ensure safe and legal clearance.
📌 I. Product Definition & Hazard Classification
Potassium Cyanide (KCN) is an inorganic compound with the formula KCN. It is a crystalline salt that is extremely soluble in water.
⚠️ Key Characteristics:
- Acute Toxicity: Highly lethal if ingested, inhaled, or absorbed through skin.
- Carcinogen: Classified as a potential carcinogen.
- Regulated Substance: Controlled under international conventions due to potential misuse (chemical weapons precursors, illicit gold mining).
🏷️ Hazard Classes (UN Number):
- UN Number:
UN 1680 - Proper Shipping Name:
POTASSIUM CYANIDE, SOLIDORPOTASSIUM CYANIDE, SOLUTION - Hazard Class:
Class 6.1(Toxic Substances) - Packing Group:
PG I(Highest degree of danger)
📦 II. HS Code Classification Details (2026 Latest)
While the chemical identity is clear, the HS Code depends on the physical state (solid vs. solution) and purity. Misclassification can trigger automatic flags by customs intelligence systems.
| HS Code | Product Description | Physical State | Key Distinction |
|---|---|---|---|
2827.39.00.00 |
Other cyanides and complex cyanides | Solid | Most common form for industrial use. Pure KCN or technical grade. |
2827.39.00.00 |
Other cyanides and complex cyanides | Solution | If dissolved in water, it still falls here, but requires "Solution" declaration. |
3824.99.92.00 |
Prepared binders for foundry molds/cores | N/A | Do NOT use unless it is a specific mixture for mold binding, not pure KCN. |
2844.30.00.00 |
Isotopically enriched compounds | N/A | Only if isotopically labeled for research. |
🔍 Critical Note:
- Pure KCN almost always falls under2827.39.
- Mixtures/Preparations: If KCN is part of a mixture (e.g., electroplating bath), it may still be classified under2827.39if the principal character is cyanide, or potentially3824if it is a specialized mixture. Consult a regulatory expert for mixtures.
- Purity: Technical grade vs. Analytical grade does not change the HS Code but affects safety data requirements.
💰 III. 2026 Tariff & Regulatory Tax Breakdown
✅ Applicable Country: United States (US)
✅ Origin: China (CN)
✅ Effective Date: Post-2025 Trade Adjustments
🎯 1. 2827.39.00.00 – Other Cyanides
| Item | Details |
|---|---|
| Base Duty Rate | 0% (Most Favored Nation) |
| Section 301 Tariff (China) | +25% (High-risk chemical category) |
| IEEPA Surcharge (CN) | +10% (National emergency powers) |
| Merchandise Processing Fee (MPF) | 0.3464% (Formal entry) |
| Harbor Maintenance Fee (HMF) | 0.125% (Vessel cargo only) |
| Total Estimated Duty | ~35.5% + MPF/HMF |
| De Minimis Eligibility | ❌ DENIED ($800 threshold does NOT apply to toxic chemicals) |
| Legal Basis | HTSUS 2827.39 → USITC Footnote 301 → IEEPA EO 13936 |
📌 Explanation:
- 301 Tariff: Potassium cyanide is considered a strategic/chemical precursor, often subject to higher scrutiny under Section 301.
- IEEPA 10%: Added as part of ongoing economic sanctions and national security measures against China.
- No De Minimis: Due to Class 6.1 hazard, shipments under $800 are not exempt from entry filing and full duty payment.
🛠️ IV. Customs Clearance Practical Advice (Step-by-Step)
✅ 1. Mandatory Documentation Checklist
| Document | Requirement | Notes |
|---|---|---|
| Safety Data Sheet (SDS) | Required | Must be GHS-compliant, Section 14 (Transport Information) must show UN 1680, Class 6.1, PG I. |
| Emergency Contact Info | Required | 24/7 contact name, phone, and email for chemical emergencies. |
| Import License | Case-by-Case | May require EPA or ATF notification depending on volume and end-use. |
| Certificate of Origin | Required | Must be signed by manufacturer or chamber of commerce. |
| Commercial Invoice | Required | Must clearly state "Potassium Cyanide", UN 1680, and Hazard Class. |
| Packing List | Required | Detail packing method (e.g., "double-lined plastic bags inside fiberboard drums"). |
| Importer Security Filing (ISF) | Required | File 24 hours before loading if coming by vessel. |
✅ 2. Shipping & Packaging Requirements (DOT/IATA)
- Packaging: Must meet UN-specification standards for Class 6.1 PG I. Typically, fiberboard drums with inner plastic liners.
- Labeling: Must display Class 6.1 Toxic Label and UN 1680 markings on all packages.
- Marking: "POTASSIUM CYANIDE", "UN 1680", "CLASS 6.1", "TOXIC".
✅ 3. Declaration Tips
- Exact Description: Do NOT use vague terms like "Chemical A" or "White Powder". Use "POTASSIUM CYANIDE, UN 1680, Class 6.1, PG I".
- End-Use Declaration: Be prepared to provide End-Use Certificates (e.g., "For use in gold mining," "For electroplating," "For research only"). Customs may request proof of legitimate industrial use.
- Anti-Dumping/Countervailing: Check for any specific duties if KCN is produced from specific sources.
🌍 V. Global Market Comparison (2026)
| Country/Region | HS Code | Base Duty | Special Restrictions | Key Certifications |
|---|---|---|---|---|
| 🇺🇸 USA | 2827.39 |
~35.5% | EPA Notification, 24/7 Emergency Contact | GHS SDS, DOT Compliance |
| 🇪🇺 EU | 2827 39 80 |
0% | REACH Registration mandatory, CLP Labeling | REACH, ADR Transport |
| 🇨🇳 China | 2827.39.90 |
0% | Import License required for toxic chemicals | CCC (if applicable), GB Standards |
| 🇬🇧 UK | 2827 39 90 |
0% | HSE Regulation, UK REACH | UK CA, ADR Transport |
| 🇯🇵 Japan | 2827 39 00 |
0% | Chemical Substances Control Law (CSCL) | JIS Standards |
📌 Conclusion:
- USA is the most expensive and regulated due to Section 301 and IEEPA tariffs.
- EU requires strict REACH compliance, which is costly for new importers.
- China requires an Import License for toxic chemicals, which can take weeks to obtain.
📌 VI. Common Mistakes & Pitfalls (Lessons Learned)
❌ Mistake 1: Declaring as "General Chemical" or "Fertilizer"
👉 Result: Seizure, fines, and blacklisting. KCN is NOT a fertilizer or general chemical.
❌ Mistake 2: Using inadequate packaging (e.g., cardboard only)
👉 Result: Rejection by DOT/Customs. Must use UN-specification packaging.
❌ Mistake 3: Omitting the Emergency Contact Number on the SDS
👉 Result: Customs Hold until SDS is corrected. Mandatory for all Class 6.1 shipments.
❌ Mistake 4: Ignoring Section 301 Tariffs
👉 Result: Underpayment of duties. Customs will assess back-tariffs + interest + penalties.
✅ Correct Approach:
"POTASSIUM CYANIDE, UN 1680, Class 6.1, PG I, for electroplating use. Packaged in UN-rated fiberboard drums. SDS attached. 24/7 Emergency Contact: +1-XXX-XXX-XXXX."
🎯 VII. Conclusion: Compliance is Non-Negotiable
🎯 Remember the Mantra:
🔹 "UN 1680, Class 6.1, No De Minimis."
🔹 "SDS with 24/7 Contact is Mandatory."
🔹 "301 Tariff Applies – Budget for ~35.5%."
📌 Pro Tip:
If you are importing small quantities for research, consider if the volume justifies the regulatory burden. Some universities or labs have pre-approved licenses for toxic chemicals. Consult your institution's EHS (Environmental Health and Safety) department.
📣 Immediate Action:
📞 Hire a licensed Customs Broker experienced in Hazardous Materials.
📄 Prepare your SDS and Emergency Contact Info before booking freight.
🚀 Pre-file ISF and ACE entries to avoid delays.
✨ Safe Import Starts with Accurate Classification!
💼 Potassium Cyanide is not just a product; it is a regulated hazardous material.
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About HS Code Classification
The Harmonized System (HS) is an internationally standardized nomenclature developed by the World Customs Organization (WCO) to classify traded products. Over 200 countries use the HS system as the basis for customs tariffs, trade statistics, and import/export regulations.
Each HS code follows a hierarchical structure:
- Chapter (2 digits) — Broad category of goods (e.g., Chapter 84: Machinery and Mechanical Appliances)
- Heading (4 digits) — More specific grouping within the chapter
- Subheading (6 digits) — Internationally standardized breakdown, used by all WCO member countries
- National subdivisions (8-10 digits) — Country-specific extensions for further classification, such as US HTSUS 10-digit codes
Correct HS code classification is essential for smooth customs clearance, accurate duty payment, and compliance with trade regulations. Misclassification can lead to customs delays, overpayment of duties, or penalties.
When importing from CN to US, the applicable tariff rates may include:
- Most-Favored-Nation (MFN) rate — The standard duty rate applied to WTO members
- General rate — Applied to countries without trade agreements
- Trade remedy duties — Additional tariffs such as Section 301 (anti-dumping), Section 232 (national security), or countervailing duties
The information provided on this page is for reference purposes only. For official classification, please consult with your local customs authority or a licensed customs broker.