HS code · 6-digit subheading
HS Code 3904.21 – Vinyl chloride, other halogenated olefin polymers; non-plasticised poly(vinyl chloride), in primary forms, mixed with other substances
HS code 3904.21 is the 6-digit subheading for vinyl chloride, other halogenated olefin polymers, non-plasticised poly(vinyl chloride), in primary forms, mixed with other substances. It is used for UPVC compounds, rigid PVC pellets, PVC pipe compounds, PVC window profile compounds and PVC siding compounds.
What HS 3904.21 covers
This code covers non-plasticized poly(vinyl chloride) (PVC) in primary forms, which has been mixed with other substances like stabilizers, lubricants, or processing aids, but *without* plasticizers. This compounded form is ready for processing into rigid PVC products, offering excellent stiffness and durability. It's a crucial intermediate in the production of durable goods. Chemical companies and compounders are the main exporters, while manufacturers of pipes, fittings, window profiles, siding, and other rigid construction materials are the primary importers. Key trade aspects include the demand from the construction sector, the need for specific formulations for different applications, and the ongoing development of lead-free and cadmium-free stabilizers to meet environmental regulations.
- Covers
- UPVC compounds
- Rigid PVC pellets
- PVC pipe compounds
- PVC window profile compounds
- PVC siding compounds
- PVC sheet compounds
- PVC conduit compounds
- PVC fitting compounds
- Examples
- Mexichem (Wavin) UPVC compounds
- Veka UPVC compounds
- Rehau UPVC compounds
- Shintech UPVC compounds
- Westlake UPVC compounds
Codes often confused with 3904.21
Common mistake. Can be confused with 390410 (unmixed PVC) if the 'mixed with other substances' aspect is missed, or with 390422 (plasticized PVC) if the absence of plasticizers is not recognized.
Top exporters and importers of HS code 390421, 2025
In 2025, the largest exporter of HS code 390421 in UN Comtrade data was Germany, with 17% of world exports; the largest importer in UN Comtrade data was Poland, with 11% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Top exporters 2025 · share of world exports
- 1 Germany $172M 17% of world exports
- 2 China $130M 13% of world exports
- 3 United States $105M 10% of world exports
World total: $1.0B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Poland $105M 11% of world imports
- 2 Germany $77M 8.0% of world imports
- 3 France $76M 7.9% of world imports
World total: $964M Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM code for 3904.21
Brazil does not split HS 3904.21: its NCM code is 3904.21.00.
All Brazil NCM codes in heading 39.04 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 3904.21
What is HS code 390421?
HS code 390421 is a 6-digit subheading in the Harmonized System that covers: Vinyl chloride, other halogenated olefin polymers; non-plasticised poly(vinyl chloride), in primary forms, mixed with other substances. This code covers non-plasticized poly(vinyl chloride) (PVC) in primary forms, which has been mixed with other substances like stabilizers, lubricants, or processing aids, but *without* plasticizers. This compounded form is ready for processing into rigid PVC products, offering excellent stiffness and durability. It's a crucial intermediate in the production of durable goods. Chemical companies and compounders are the main exporters, while manufacturers of pipes, fittings, window profiles, siding, and other rigid construction materials are the primary importers. Key trade aspects include the demand from the construction sector, the need for specific formulations for different applications, and the ongoing development of lead-free and cadmium-free stabilizers to meet environmental regulations.
What products fall under HS code 390421?
UPVC compounds, rigid PVC pellets, PVC pipe compounds, PVC window profile compounds, PVC siding compounds, PVC sheet compounds, PVC conduit compounds, PVC fitting compounds
What are common misclassifications for HS code 390421?
Can be confused with 390410 (unmixed PVC) if the 'mixed with other substances' aspect is missed, or with 390422 (plasticized PVC) if the absence of plasticizers is not recognized.
Which countries are the top exporters of goods under HS code 390421?
In 2025, the top exporters of HS code 390421 in UN Comtrade data were Germany ($172M, 17% of world exports), China ($130M) and the United States ($105M). World exports came to about $1.0B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of goods under HS code 390421?
In 2025, the top importers of HS code 390421 in UN Comtrade data were Poland ($105M, 11% of world imports), Germany ($77M) and France ($76M). World imports came to about $964M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
How is HS code 390421 structured?
HS code 390421 is a 6-digit subheading under the Harmonized System. The first 2 digits (39) identify the chapter, digits 3-4 (04) identify the heading, and digits 5-6 (21) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 390421?
In Brazil, HS code 390421 is NCM 3904.21.00. The last two digits are 00 because Brazil does not split this HS code further.