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HSChapter 28
U.S. imports of carbonates & peroxocarbonates (other) (HS 283699) totaled $8.9M in April 2026, traded with 25 countries.
Importers of Carbonates & Peroxocarbonates (Other) paid $387K in duties in April 2026 — an effective duty rate of 6.3% on $6.1M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataSpanning cobalt carbonates, bismuth carbonate, commercial ammonium carbonates, lead carbonate, zirconium carbonates, and various peroxocarbonates (percarbonates), this residual heading captures a chemically diverse set of inorganic salts used across ceramics, pigments, mining, and industrial bleaching applications. Australia and the Philippines lead US import supply — reflecting cobalt and zirconium mineral processing capacity in the Asia-Pacific region — with Germany and China also significant sources. The breadth of distinct 10-digit lines (including 2836991000 through 2836999050) means correct classification requires identifying the specific metal cation or peroxo structure, as misclassification between, for example, cobalt carbonate and zirconium carbonate carries meaningful duty and trade-remedy implications.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Peroxocarbonates contain a peroxo linkage (–O–O–) in the anion structure, distinguishing them chemically from simple carbonate salts. Sodium percarbonate, a common bleaching agent, is a typical example. Under the US schedule, peroxocarbonates not otherwise specified fall under lines 2836995050 or 2836999050 depending on their specific composition, while named compounds such as zirconium carbonates have their own dedicated line (2836995010).
Cobalt carbonate (2836991000) must be distinguished from cobalt oxides, cobalt hydroxides, and cobalt salts of organic acids, all of which classify elsewhere. Given cobalt's critical-mineral status and potential trade-remedy exposure on certain origins, misclassification can result in underpayment of duties or incorrect country-of-origin determinations. A licensed customs broker familiar with inorganic cobalt chemistry is advisable for high-volume shipments.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| AUSTRALIA | $2.8M | $4K | -$2.8M |
| MEXICO | -- | $2.7M | +$2.7M |
| GERMANY | $1.9M | $74K | -$1.9M |
| CANADA | $103K | $1.1M | +$1.0M |
| PHILIPPINES | $1.2M | -- | -$1.2M |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2836995050 | PEROXOCARBONATES (PERCARBONATES), NESOI | $7.5M | 5.22% | $250K |
| 2836995010 | ZIRCONIUM CARBONATES | $577K | 9.76% | $56K |
| 2836993000 | COMMERCIAL AMMONIUM CARBONATES | $520K | 13.44% | $70K |
| 2836991000 | COBALT CARBONATES | $215K | 4.20% | $9K |
| 2836992000 | BISMUTH CARBONATE | $11K | 15.50% | $2K |
| 2836994000 | LEAD CARBONATE | $0 | -- | -- |
| 2836995000 | PEROXOCARBONATES (PERCARBONATES), NESOI | $0 | -- | -- |
PEROXOCARBONATES (PERCARBONATES), NESOI
ZIRCONIUM CARBONATES
COMMERCIAL AMMONIUM CARBONATES
COBALT CARBONATES
BISMUTH CARBONATE
LEAD CARBONATE
PEROXOCARBONATES (PERCARBONATES), NESOI
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2836999050 | PEROXOCARBONATES (PERCARBONATES), NESOI | $2.9M |
| 2836994000 | LEAD CARBONATE | $1.8M |
| 2836992000 | BISMUTH CARBONATE | $0 |
| 2836993000 | COMMERCIAL AMMONIUM CARBONATES | $0 |
PEROXOCARBONATES (PERCARBONATES), NESOI
3.7M kg
LEAD CARBONATE
630.8K kg
BISMUTH CARBONATE
COMMERCIAL AMMONIUM CARBONATES
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
| Port | Imports | Exports | Balance |
|---|---|---|---|
| CHARLESTON, SC | $2.4M | -- | -$2.4M |
| EL PASO, TX | -- | $1.8M | +$1.8M |
| NEWARK, NJ | $1.7M | -- | -$1.7M |