What is HS-4 2931 used for?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
HS-4 · Heading
2931 — Other organo-inorganic compounds
Chapter 29: Organic chemicals
Plain-language overview
Use HS-4 2931 when importing or exporting organo-inorganic compounds, such as tetramethyl lead or tributyltin compounds. These chemicals are often used in industrial applications, including fuel additives and biocides.
To distinguish between the HS-6 lines, consider the specific chemical composition. For example, 293110 covers tetramethyl lead and tetraethyl lead, while 293120 is for tributyltin compounds. If your product doesn’t fit these categories, check the non-halogenated organo-phosphorous derivatives under 293141 to 293149.
If your product is a non-halogenated organo-phosphorous derivative, you’ll need to identify its specific type. For instance, 293141 is for dimethyl methylphosphonate, while 293144 refers to methylphosphonic acid. If your compound is not listed, you may fall under 293149, which covers other non-halogenated derivatives.
Keywords & topics
Useful terms traders and brokers use for this HS-4 heading.
organo-inorganic compounds · tetramethyl lead · tributyltin compounds · non-halogenated organo-phosphorous derivatives · methylphosphonic acid · chemical import codes · phosphorus derivatives · chemical classification · industrial chemicals · chemical export regulations
Examples
Drawn from the official tariff wording for this HS-4 heading. Always confirm against your published schedule and legal notes.
- Tetramethyl lead used in gasoline formulations.
- Tributyltin compounds for antifouling paints.
- Dimethyl methylphosphonate as a chemical intermediate.
- Methylphosphonic acid for agricultural applications.
- Halogenated organo-phosphorous derivatives for flame retardants.
Common questions
Frequent classification questions with short practical guidance.
How to classify organo-inorganic compounds?
Write down material, use, and product form first, then compare nearby lines before you lock the code.
What are the differences between HS-6 lines under 2931?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
Is tributyltin compound regulated?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
How to determine the correct HS code for phosphorous derivatives?
Match the product to the legal wording, then verify the final pick in your country tariff schedule before filing.
What are examples of organo-inorganic compounds?
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 tetramethyl lead under HS codes
Use this topic to narrow your shortlist, then validate the final code against legal wording.
Differences between halogenated and non-halogenated organo-phosphorous derivatives
Compare adjacent HS lines and pick the one that matches material, function, and product form most closely.
Importing tributyltin compounds regulations
Check the exact product specs and destination-country tariff notes before finalizing the code.
Identifying non-halogenated organo-phosphorous derivatives
Use this topic to narrow your shortlist, then validate the final code against legal wording.
What is included in HS-4 2931?
Use this topic to narrow your shortlist, then validate the final code against legal wording.
Guidelines for shipping organo-inorganic compounds
Use this topic to narrow your shortlist, then validate the final code against legal wording.
Understanding chemical classifications for imports
Check the exact product specs and destination-country tariff notes before finalizing the code.
How to find the right HS code for methylphosphonic acid
Use this topic to narrow your shortlist, then validate the final code against legal wording.
Questions & answers
For orientation only—the binding text is your national tariff and the WCO nomenclature your country uses.
- What products fall under HS-4 2931?
- HS-4 2931 includes organo-inorganic compounds like tetramethyl lead, tributyltin compounds, and various organo-phosphorous derivatives.
- How do I choose the correct HS-6 code?
- Identify the specific chemical structure or use of your product. Refer to the detailed descriptions under each HS-6 line.
- Are there any restrictions on importing these compounds?
- Yes, some organo-inorganic compounds, especially those that are halogenated, may be subject to regulatory restrictions depending on your country.
- What is the difference between halogenated and non-halogenated derivatives?
- Halogenated derivatives contain halogen atoms in their structure, while non-halogenated derivatives do not, which often affects their usage and regulatory status.
- Can I classify my product under 'other' in HS-4 2931?
- If your product does not fit the specific categories listed, you may classify it under **HS-6 293190**, which covers other organo-inorganic compounds.
Continue classification
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Heading-browse mode uses HS-6 293100 (first line of this block).
HS-6 subheadings (17)
- 293110Organo-inorganic compounds; tetramethyl lead and tetraethyl lead
- 293120Organo-inorganic compounds; tributyltin compounds
- 293141Non-halogenated organo-phosphorous derivatives; dimethyl methylphosphonate
- 293142Non-halogenated organo-phosphorous derivatives; dimethyl propylphosphonate
- 293143Non-halogenated organo-phosphorous derivatives; diethyl ethylphosphonate
- 293144Non-halogenated organo-phosphorous derivatives; methylphosphonic acid
- 293145Non-halogenated organo-phosphorous derivatives; salt of methylphosphonic acid and (aminominomethyl) urea (1:1)
- 293146Non-halogenated organo-phosphorous derivatives; 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane 2,4,6-trioxide
- 293147Non-halogenated organo-phosphorous derivatives; (5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl) methyl methyl methylphosphonate
- 293148Non-halogenated organo-phosphorous derivatives; 3,9-dimethyl-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5] undecane 3,9-dioxide
- 293149Non-halogenated organo-phosphorous derivatives; other non-halogenated organo-phosphorous derivatives, n.e.c. in item no. 2931.4
- 293151Halogenated organo-phosphorous derivatives; methylphosphonic dichloride
- 293152Halogenated organo-phosphorous derivatives; propylphosphonic dichloride
- 293153Halogenated organo-phosphorous derivatives; O-(3-chloropropyl) O-[4-nitro-3-(trifluoromethyl)phenyl] methylphosphonothionate
- 293154Halogenated organo-phosphorous derivatives; trichlorfon (ISO)
- 293159Halogenated organo-phosphorous derivatives; other halogenated organo-phosphorous derivatives, n.e.c. in item no. 2931.5
- 293190Organo-inorganic compounds; other than tetramethyl lead, tetraethyl lead, tributyltin compounds, and other organo-phosphorous derivatives