Thailand HS Code

HS Code 390311: Polystyrene : Expansible in Thailand

Q: Is HS code 390311 the same across all countries?

Yes — up to the 6-digit level, HS code 390311 is the same in every WCO member country. Beyond 6 digits, each country extends the code for national tariff and statistical use. Thailand extends it under AHTN-TH.

Q: What system does Thailand use to classify HS code 390311?

Thailand classifies products under the ASEAN Harmonized Tariff Nomenclature 2022 — Thai Customs Tariff (AHTN-TH; locally พิกัดอัตราศุลกากร (AHTN 2022)), which extends HS codes to 11 digits. The first 6 digits align with the WCO Harmonized System, and the rest cover national tariff and statistical needs.

Q: Where can I officially look up HS code 390311 in Thailand?

The official source is https://www.customs.go.th/. For faster cross-country lookups, TradeInt's HS Code Tool consolidates classifications across all major countries in one place.

What is HS Code 390311 in Thailand

Under Thailand's ASEAN Harmonized Tariff Nomenclature 2022 — Thai Customs Tariff (พิกัดอัตราศุลกากร (AHTN 2022)), HS Code 390311 is the WCO Harmonized System subheading for Polystyrene : Expansible. This is the most detailed internationally standardized level; Thailand extends classifications to 11 digits under its national tariff system. 390311 belongs to Section VII: Plastics and articles thereof; rubber and articles thereof, Chapter 39: Plastics and articles thereof, Heading 3903: Polymers of styrene, in primary forms.

Explore more 2026 Latest Thailand import export trade data and shipment records for HS Code Expandable Polystyrene (EPS) on TradeInt global trade data platform

Classification Path of HS Code 390311 in Thailand

Section VII

Chapters (39-40) Plastics and articles thereof; rubber and articles thereof

Chapter 39

Plastics and articles thereof

HS Code 3903

Polymers of styrene, in primary forms

HS Code 390311

Polystyrene : Expansible

HS Code 39031110000

In the form of granules ในลักษณะเป็นเม็ด

HS Code 39031190000

Other อื่น ๆ

Thailand Tariff Classification: ASEAN Harmonized Tariff Nomenclature 2022 — Thai Customs Tariff (AHTN-TH)

In Thailand, HS 390311 is classified under the ASEAN Harmonized Tariff Nomenclature 2022 — Thai Customs Tariff (พิกัดอัตราศุลกากร (AHTN 2022)) — a 11-digit national extension of the WCO 6-digit Harmonized System.

Tariff schedule ASEAN Harmonized Tariff Nomenclature 2022 — Thai Customs Tariff (AHTN-TH)

Local name พิกัดอัตราศุลกากร (AHTN 2022)

Digits 11

Official source https://www.customs.go.th/

You know what 390311 means. Now see 2026 latest real trade activity for Expandable Polystyrene (EPS) in Thailand.

Buyers, suppliers, origin and destination countries, shipment dates, and quantities direct from customs records.

Search 2026 Latest Thailand Import Data Search 2026 Latest Thailand Export Data

Top Trading Product of HS Code 3903

Top Thailand import Product Under HS Code 3903

1 390330: Acrylonitrilebutadienestyrene (ABS) copolymers $269.7M 2 390390: Other $111.9M 3 390319: Polystyrene : Other $88.0M

Figures shown for 2025.

For more 2026 recent data, search for Thailand import trade records

Top Thailand export Product Under HS Code 3903

1 390330: Acrylonitrilebutadienestyrene (ABS) copolymers $119.9M 2 390390: Other $92.4M 3 390319: Polystyrene : Other $68.2M

Figures shown for 2025.

For more 2026 recent data, search for Thailand export trade records

Related HS Code to Thailand Expandable Polystyrene (EPS) (390311)

HS Code 39031110000

In the form of granules

Styreneacrylonitrile (SAN) copolymers

HS Code 390330

Acrylonitrilebutadienestyrene (ABS) copolymers

HS Code 390390

Other

HS Code 390110

Polyethylene having a specific gravity of less than 0,94

HS Code 390120

Polyethylene having a specific gravity of 0,94 or more

HS Code 390130

Ethylenevinyl acetate copolymers

HS Code 390140

Ethylenealphaolefins copolymers, having a specific gravity of less than 0,94

Frequently Asked Questions

What is HS code 390311 in Thailand?

HS code 390311 covers Polystyrene : Expansible in Thailand. It sits in Chapter 39 (Plastics and articles thereof), Heading 3903 of the Harmonized System, and is classified under AHTN-TH.

Is HS code 390311 the same across all countries?

What system does Thailand use to classify HS code 390311?

Where can I officially look up HS code 390311 in Thailand?