What is HS code 283990 used for?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
HS-6 · Subheading
283990
Silicates; commercial alkali metal silicates, other than of sodium
Heading 2839 — Silicates; commercial alkali metal silicates
Chapter 28: Inorganic chemicals
Plain-language overview
Use HS-6 283990 when importing or exporting commercial alkali metal silicates that are not sodium-based. This includes products like potassium silicate solutions used in agriculture as fertilizers or in industrial applications.
This code specifically covers silicates derived from alkali metals other than sodium, distinguishing it from HS-6 283910, which deals with sodium silicates. If you’re dealing with potassium or lithium silicates, this is the right classification.
When considering silicates for various applications, it's crucial to identify the metal involved. For instance, potassium silicates are often used in glass manufacturing, while lithium silicates may be used in ceramics.
Understanding the specific type of silicate and its end-use will help ensure compliance and proper classification. This is essential for customs documentation and tariff applications.
Keywords & topics
Useful terms traders and brokers use for this HS-6 subheading.
commercial alkali metal silicates · potassium silicate · lithium silicate · calcium silicate · industrial silicates · agricultural silicates · glass manufacturing silicates · refractory silicates · food additive silicates · silicate solutions · non-sodium silicates · chemical classification · customs documentation · tariff applications · end-use classification
Examples
Drawn from the official tariff wording for this HS-6 subheading. Always confirm against your published schedule and legal notes.
- Potassium silicate solution for agricultural use
- Lithium silicate used in ceramic production
- Magnesium silicate for industrial applications
- Calcium silicate as a food additive
- Barium silicate in glass manufacturing
- Aluminum silicate used in refractory materials
- Strontium silicate for specialty coatings
Common questions
Frequent classification questions with short practical guidance.
How to classify potassium silicate?
Write down material, use, and product form first, then compare nearby lines before you lock the code.
Are lithium silicates included in HS 283990?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
What are examples of non-sodium silicates?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
How do I find the right HS code for silicates?
Match the product to the legal wording, then verify the final pick in your country tariff schedule before filing.
What is the difference between HS 283910 and 283990?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
Can I use HS 283990 for agricultural products?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
What are the applications of commercial alkali metal silicates?
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.
How to classify potassium silicate under HS codes
Use this topic to narrow your shortlist, then validate the final code against legal wording.
Examples of commercial alkali metal silicates for import
Check the exact product specs and destination-country tariff notes before finalizing the code.
Differences between sodium and non-sodium silicates
Compare adjacent HS lines and pick the one that matches material, function, and product form most closely.
Understanding HS code 283990 for customs
Check the exact product specs and destination-country tariff notes before finalizing the code.
What products fall under HS 283990 classification?
Use this topic to narrow your shortlist, then validate the final code against legal wording.
Using HS 283990 for agricultural silicate solutions
Use this topic to narrow your shortlist, then validate the final code against legal wording.
Identifying the correct HS code for lithium silicates
Use this topic to narrow your shortlist, then validate the final code against legal wording.
Classification tips for importing silicates other than sodium
Check the exact product specs and destination-country tariff notes before finalizing the code.
Questions & answers
For orientation only—the binding text is your national tariff and the WCO nomenclature your country uses.
- What types of products are classified under HS-6 283990?
- HS-6 283990 covers commercial alkali metal silicates that are not sodium-based, such as potassium, lithium, and magnesium silicates used in various industrial and agricultural applications.
- How do I determine if my product is sodium silicate or not?
- Check the product composition. If it contains sodium as the primary alkali metal, it falls under HS-6 283910. If it contains potassium, lithium, or other alkali metals, use HS-6 283990.
- Can I use HS-6 283990 for agricultural fertilizers?
- Yes, if the fertilizer contains potassium silicate or other non-sodium silicates, it is appropriate to classify it under HS-6 283990.
- What is the difference between HS-6 283990 and HS-6 283910?
- HS-6 283990 is for non-sodium silicates, while HS-6 283910 specifically covers sodium silicates. Ensure you identify the alkali metal in your product for correct classification.
- Do I need special documentation for importing silicates?
- Yes, you will need to provide detailed product descriptions and ensure compliance with customs regulations, including the correct HS code.
- What industries use commercial alkali metal silicates?
- Industries such as agriculture, ceramics, glass manufacturing, and construction commonly use commercial alkali metal silicates for various applications.
- How can I find the right HS code for my silicate product?
- Review the product's chemical composition and intended use. Consulting with a customs broker can also help ensure accurate classification.
- Is HS-6 283990 applicable for food additives?
- Yes, certain silicates classified under HS-6 283990 can be used as food additives, such as calcium silicate.
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