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HSChapter 28
U.S. imports of magnesium hydroxide and magnesium peroxide (HS 281610) totaled $2.3M in April 2026, traded with 11 countries.
Importers of Magnesium Hydroxide and Magnesium Peroxide paid $60K in duties in April 2026 — an effective duty rate of 4.8% on $1.3M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataMagnesium hydroxide — widely recognized in commerce as milk of magnesia when in suspension — functions as a flame retardant filler in polymers, a neutralizing agent in wastewater treatment, and an antacid active ingredient in pharmaceutical applications. Both magnesium hydroxide and the less common magnesium peroxide are captured under a single tariff line (2816100000). The Netherlands and Mexico lead US imports under this heading, with Israel also a significant source — reflecting Dead Sea Bromine Group's magnesium chemical operations.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
In polymer compounding, magnesium hydroxide acts as a halogen-free flame retardant by releasing water vapor when heated, cooling the combustion zone. Key grade specifications include particle size distribution (typically 1–5 microns), surface treatment (stearic acid coating for polyolefin compatibility), and purity level. These parameters are negotiated commercially and do not affect HTS classification but are critical for end-use performance.
Yes. Pharmaceutical-grade magnesium hydroxide intended for use as an active ingredient or excipient is subject to FDA oversight, including compliance with USP monograph specifications and potentially Current Good Manufacturing Practice (cGMP) requirements at the foreign facility. Industrial-grade material for wastewater treatment or flame retardant use does not carry these FDA requirements. Importers should ensure the grade and intended use are clearly documented to support correct regulatory treatment at entry.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| NETHERLANDS | $934K | $103K | -$831K |
| MEXICO | $779K | $158K | -$621K |
| CANADA | -- | $772K | +$772K |
| ISRAEL | $424K | -- | -$424K |
| JAPAN | $115K | -- | -$115K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2816100000 | MAGNESIUM HYDROXIDE AND MAGNESIUM PEROXIDE | $2.3M | 4.76% | $60K |
MAGNESIUM HYDROXIDE AND MAGNESIUM PEROXIDE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2816100000 | MAGNESIUM HYDROXIDE AND MAGNESIUM PEROXIDE | $1.4M |
MAGNESIUM HYDROXIDE AND MAGNESIUM PEROXIDE
1.8M kg
URANIUM ENRICHED IN U235 ETC. PLUTONIUM ETC.
HS 284420
NATURAL URANIUM & COMPOUNDS, ALLOYS & CERAMICS ETC
HS 284410
ANHYDROUS AMMONIA
HS 281410
ALLOYS, DISPERSIONS,ISOTOPES & COMPOUNDS NES
HS 284443
SILICON, UNDER 99.99% (BY WEIGHT) SILICON
HS 280469
PHOSPHORIC ACID AND POLYPHOSPHORIC ACIDS
HS 280920
| State | Imports | Exports | Balance |
|---|---|---|---|
| Connecticut | $846K | -- | -$846K |
| Delaware | -- | $477K | +$477K |
| Texas | $430K | -- | -$430K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| LAREDO, TX | $612K | $158K | -$454K |
| HOUSTON, TX | $430K | $68K | -$362K |
| NEWARK, NJ | $487K | -- | -$487K |