5 bromouracil

💊 5-Bromouracil (Heterocyclic Compounds)

🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy
📌 I. Product Definition & Classification: What is "5-Bromouracil"?

5-Bromouracil (5-BU) is a synthetic halogenated pyrimidine derivative. In international trade, it falls under the category of Heterocyclic Compounds with Nitrogen Hetero-atom(s) Only, specifically those containing a pyrimidine ring structure.

It is chemically related to Uracil and Thymine, often used in biochemical research as a mutagen or in pharmaceutical synthesis. Its classification depends heavily on its primary use and chemical structure.

⚠️ Key Distinction:
- If used primarily as a pharmaceutical ingredient or drug intermediate → It may qualify for specific drug subheadings.
- If used for industrial, chemical, or general research purposes without being a finished drug → It falls under general heterocyclic compounds.

📦 II. HS Code Classification Details (2026 Latest Tariff Authoritative Comparison)

Based on the provided <DATA>, the relevant HS Codes are determined by the chemical structure and intended use.

🔍 Critical Note:
- 5-Bromouracil is a pyrimidine derivative (specifically, a brominated uracil).
- The provided <DATA> does not list 5-Bromouracil explicitly by name in 2933.59.85.00, but it lists "6-Methyl uracil" as an example under this code. Since 5-Bromouracil is chemically similar (a substituted uracil/pyrimidine), it is often grouped under "Other" heterocyclic compounds in Chapter 29, unless it is explicitly marketed and recognized as a drug (API).
- If intended for pharmaceutical formulation (as an API), 2933.99.90.00 ("Drugs") is the more accurate classification for finished drug substances.
- If used as a chemical reagent or intermediate for research/industrial synthesis, 2933.59.85.00 is typically used.

💰 III. 2026 Latest Tariff Rate Details (Including Additional Taxes)

✅ Applicable Country: United States (US)
✅ Origin: China (CN)
✅ Effective Date: 2026 Tariff Schedule

🎯 1. 2933.59.85.00 —— Heterocyclic Compounds (Pyrimidine Derivatives)

📌 Explanation:
- This subheading covers "Other" pyrimidine derivatives not specifically listed.
- No additional tariffs are applied to this specific chemical code under the current data.
- Result: Zero tariff cost for imports under this code.

🎯 2. 2933.99.90.00 —— Drugs (Heterocyclic Compounds)

📌 Explanation:
- This subheading is for drugs that are heterocyclic compounds with nitrogen atoms only.
- No additional tariffs are applied.
- Result: Zero tariff cost for imports under this code.

⚠️ Important: Both codes show 0.0% total tax in the provided data. This is unusual for many chemical imports, which often carry 3–6.5% base tariffs. However, per the <DATA>, no tax is applied. Ensure that this matches the current official HTSUS database for your specific shipment, as tariff codes can change annually.

🛠️ IV. Customs Clearance Practical Advice (Pitfall Avoidance Guide)

✅ 1. Required Documentation Checklist (All Required)

✅ 2. Declaration Strategy (Key Rules)

🔥 "Specify Use, Declare CAS, Match HS Code!"

✅ 3. Special Considerations

🌍 V. Global Market Comparison (2026)

📌 Conclusion:
- US imports of 5-Bromouracil have 0% tariff under the provided data.
- Correct HS Code selection is critical to avoid FDA/Customs mismatches.
- Documentation (CAS Number, CoA, SDS) is non-negotiable for chemical imports.

📌 VI. Common Mistakes & Pitfalls (Lessons Learned)

❌ Mistake 1: Failing to provide the CAS Number (51-21-8)
👉 Consequence: Customs cannot verify the product → Delay or Seizure.

❌ Mistake 2: Declaring a Drug API as a "General Chemical"
👉 Consequence: May bypass FDA screening → Regulatory Violation.

❌ Mistake 3: Using vague descriptions like "Pyrimidine Compound"
👉 Consequence: Ambiguity leads to Higher Duty Assessment or Audits.

❌ Mistake 4: Ignoring SDS Requirements
👉 Consequence: Chemical shipments without SDS are often refused entry or held for safety review.

✅ Correct Practice:

"5-Bromouracil, CAS 51-21-8, Purity 99%, for Pharmaceutical Research Use, HS Code 2933.99.90.00"

🎯 VII. Conclusion: Professional Clearance Saves Time and Money

🎯 Key Takeaways:

🔹 "Use Determines HS Code: Drug vs. Chemical."
🔹 "Always Include CAS Number: 51-21-8."
🔹 "Zero Tariff Under Current Data, But Compliance is Key."

📌 Pro Tip:
- If importing large quantities for pharmaceutical production, consult with a customs broker to confirm if 2933.99.90.00 (Drugs) is applicable.
- For small-scale research, 2933.59.85.00 is safer and easier to declare.

📣 Immediate Action:

📞 Contact a Customs Broker
📄 Prepare SDS, CoA, and Invoice with CAS Number
🚀 Ensure Smooth Clearance with 0% Tariff Under Current Rules!

✨ Professional Clearance Starts with Accurate Classification!
💼 Your Chemical Imports, Zero Tax, Full Compliance!