HS Code for Fused Magnesia 2025 Guide

What is the HS Code for Fused Magnesia?

The primary HS code for fused magnesia is 2519.90. This 6-digit code from the Harmonized System (HS) classifies natural magnesium oxide, including fused forms, worldwide.

• Global standard under WCO HS Nomenclature 2022 (valid through 2027)
• Covers high-purity fused magnesia used in refractories
• Extended digit HTS in US)
• Essential for import/export declarations in 2025
• No major WCO changes until 2027, but national updates apply

What Exactly is Fused Magnesia?

**Fused magnesia** is magnesium oxide (MgO) produced by electric arc fusion for superior purity. It withstands extreme temperatures in industrial applications.

• Purity levels: 95-99% MgO
• Melting point: Over 2,800°C
• Key uses: Steel ladles, cement kilns, glass furnaces
• Forms: Grains, powder, bricks
• Critical for refractory linings

HS Code 2519.90 Breakdown for Fused Magnesia

HS 2519 covers natural magnesium oxide; 2519.90 specifies fused and dead-burned types.

Use 2519.90 for accurate tariff compliance in shipments.

2025 Regional HS Code Updates for Fused Magnesia

While global HS remains stable, 2025 brings national HS code changes. Focus on GCC, US, and EU adjustments.

• GCC: 12-digit HS codes from Jan 1 (e.g., Saudi 2519.90.00.12)
• US: Mandatory 10-digit HTS for all parcels post-de minimis end
• EU: Combined Nomenclature 2025 adds subheadings for additives
• China: Enhanced purity documentation
• Australia: Aligns with global but stricter inspections

How to Find the Correct HS Code for Fused Magnesia

Follow this step-by-step process for precise classification.

1. Confirm product: Fused MgO via electric arc (not calcined)
2. Check purity: ≥90% MgO qualifies under 2519.90
3. Review additives: Minor impurities OK; major shifts to 28xx chemicals
4. Match regional extension: Add country-specific digits
5. Verify with WCO database or customs ruling

HS Code for Fused Magnesia in E-commerce Shipments 2025

Low-value e-commerce fused magnesia now requires full HS declaration. US de minimis ends Aug 29, 2025.

• Declare 2519.90 on all parcels
• Include commercial invoice with purity cert
• Use ACE system for US pre-clearance
• Expect duties: 2-4% MFN rates
• Track via USPS mandatory HTS from Sep 1

GCC 12-Digit HS Codes for Fused Magnesia 2025

GCC countries implement 12-digit HS codes 2025 for better tracking. Effective Jan 1 in Saudi, UAE, Qatar, etc.

Common Classification Challenges for Fused Magnesia

Additives and forms can shift HS code from 2519.90. Avoid misclassification penalties.

• Purity below 90%: May fall to 2520 or 28xx
• Shaped refractories: 6902-6903 series
• Mixed with binders: Check principal material
• Export controls: High-purity may need licenses
• 2025 case study: US importer fined $10K for 2519.10 misuse

FAQ: HS Code for Fused Magnesia 2025

Quick answers to top questions on HS code for fused magnesia.

1. What is the exact HS code for fused magnesia? 2519.90 for fused and dead-burned magnesium oxide.
2. Are there 2025 changes to HS 2519.90? No global WCO changes; regional extensions like GCC 12-digit apply.
3. How does purity affect HS code for fused magnesia? Over 90% MgO stays in 2519.90; lower may shift to chemicals.
4. What is the US HTS code for fused magnesia imports? 2519.90.0040 for other magnesium oxide forms.
5. Does EU CN 2025 change fused magnesia classification? Retains 2519.90 with subcodes for additives.
6. Is fused magnesia subject to 2025 anti-dumping duties? Check country-specific; China-origin often faces US/EU duties.
7. How to classify fused magnesia powder vs. grains? Both under 2519.90; form doesn't alter heading.
8. What documents prove HS code for fused magnesia? Purity certificate, production method specs, WCO explanatory notes.
9. Can fused magnesia with silica be 2519.90? Yes, if MgO principal component under WCO rules.
10. Where to verify HS code for fused magnesia exports? National customs or WCO HS database online.

Resources for HS Code Classification

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