What are reaction initiators in chemical processes?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
HS-4 · Heading
3815 — Reaction initiators, reaction accelerators and catalytic preparations n.e.c. or included
Chapter 38: Miscellaneous chemical products
Plain-language overview
Use HS-4 3815 when importing reaction initiators, accelerators, or catalytic preparations. For example, if you're bringing in nickel-based catalysts for industrial chemical reactions, this heading applies. It covers both supported and unsupported forms, making it crucial for various chemical manufacturing processes.
When deciding between the HS-6 lines, consider the active substance. For instance, HS-6 381511 is specific to catalysts with nickel, while HS-6 381512 pertains to those with precious metals. If your product contains neither, you might look at HS-6 381519, which covers other active substances.
If your shipment includes unsupported reaction initiators or accelerators, you should refer to HS-6 381590. This line is distinct because it does not require a support medium, unlike the other subheadings, which specify supported catalysts.
Keywords & topics
Useful terms traders and brokers use for this HS-4 heading.
reaction initiators · reaction accelerators · catalytic preparations · nickel catalysts · precious metal catalysts · unsupported catalysts · chemical manufacturing · supported catalysts · active substances in catalysts · HS-4 3815 · HS-6 381511 · HS-6 381512 · HS-6 381519 · HS-6 381590
Examples
Drawn from the official tariff wording for this HS-4 heading. Always confirm against your published schedule and legal notes.
- Nickel-based catalysts for polymerization reactions
- Precious metal catalysts for automotive exhaust systems
- Unsupported reaction accelerators for pharmaceutical synthesis
- Supported catalysts for biodiesel production
- Reaction initiators used in resin manufacturing
- Catalytic preparations for chemical processing industries
Common questions
Frequent classification questions with short practical guidance.
How to classify catalytic preparations for import?
Write down material, use, and product form first, then compare nearby lines before you lock the code.
What is the difference between supported and unsupported catalysts?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
Which HS code for nickel-based catalysts?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
How to choose the right HS-6 line for reaction accelerators?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
What are the applications of precious metal catalysts?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
Related topics
Common real-world topics that come up during code comparison.
importing reaction initiators and accelerators
Check the exact product specs and destination-country tariff notes before finalizing the code.
catalysts supported with nickel for chemical reactions
Use this topic to narrow your shortlist, then validate the final code against legal wording.
precious metal catalytic preparations for automotive
Use this topic to narrow your shortlist, then validate the final code against legal wording.
unsupported reaction initiators for pharmaceuticals
Use this topic to narrow your shortlist, then validate the final code against legal wording.
choosing HS codes for chemical products
Use this topic to narrow your shortlist, then validate the final code against legal wording.
understanding catalytic preparations in trade
Use this topic to narrow your shortlist, then validate the final code against legal wording.
reaction accelerators used in industrial applications
Use this topic to narrow your shortlist, then validate the final code against legal wording.
difference between nickel and precious metal catalysts
Compare adjacent HS lines and pick the one that matches material, function, and product form most closely.
Questions & answers
For orientation only—the binding text is your national tariff and the WCO nomenclature your country uses.
- What is the main use of HS-4 3815?
- HS-4 3815 is used for importing reaction initiators, accelerators, and catalytic preparations, particularly in chemical manufacturing.
- How do I determine the correct HS-6 code?
- Identify the active substance in your product. Use HS-6 381511 for nickel, HS-6 381512 for precious metals, HS-6 381519 for other substances, and HS-6 381590 for unsupported catalysts.
- What types of products fall under HS-6 381590?
- HS-6 381590 covers unsupported reaction initiators and accelerators, which do not require a support medium.
- Are there any specific regulations for importing catalysts?
- Yes, importing catalysts may be subject to specific regulations depending on the active substances and their applications. Always check with customs for compliance.
- Can I use HS-4 3815 for all types of catalysts?
- No, HS-4 3815 specifically categorizes catalysts based on their active substances. Ensure you select the correct HS-6 code that matches your product.
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Heading-browse mode uses HS-6 381500 (first line of this block).
HS-6 subheadings (4)
- 381511Catalysts, supported; reaction initiators, reaction accelerators and catalytic preparations, with nickel or nickel compounds as the active substance, n.e.c. or included
- 381512Catalysts, supported; reaction initiators, reaction accelerators and catalytic preparations, with precious metal or precious metal compounds as the active substance, n.e.c. or included
- 381519Catalysts, supported; reaction initiators, reaction accelerators and catalytic preparations, with an active substance other than nickel or precious metals or their compounds, n.e.c. or included
- 381590Reaction initiators, reaction accelerators and catalytic preparations, unsupported, n.e.c. or included