Chapter 2909 — Customs Tariff Headings

2909.30.00Aromatic ethers and their halogenated, sulphonated, nitrated or nitrosated derivatives

2909.4Ether-alcohols and their halogenated, sulphonated, nitrated or nitrosated derivatives:

2909.50.00Ether-phenols, ether-alcohol-phenols and their halogenated, sulphonated, nitrated or nitrosated derivatives

2909.60Alcohol peroxides, ether peroxides, acetal and hemiacetal peroxides, ketone peroxides and their halogenated, sulphonated, nitrated or nitrosated derivatives

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Products classified under Tariff item 29.09

Anhydrous Diethyl Ether

Anhydrous diethyl ether is a water-free form of diethyl ether, a chemically defined acyclic ether. It is commonly used as a solvent in Grignard reactions and other moisture-sensitive chemical syntheses. The anhydrous state is a standard purification method and does not render the product particularly suitable for a specific use, so it remains classified under tariff item 2909.11.00.

Diethyl Ether ACS Reagent Grade

Diethyl ether ACS reagent grade is a high-purity form of diethyl ether meeting American Chemical Society specifications for analytical procedures. It is a chemically defined acyclic ether and the ACS specifications ensure reagent purity without adding substances that would make it particularly suitable for a specific use. Therefore, it falls under tariff item 2909.11.00.

Diethyl Ether Extraction Solvent

Diethyl ether used as an extraction solvent for natural products such as essential oils and alkaloids is a chemically defined acyclic ether. Its use as a general solvent does not make it particularly suitable for a specific use, as it is a standard application of diethyl ether. Thus, it is classified under tariff item 2909.11.00.

Diethyl Ether (Laboratory Grade)

Laboratory grade diethyl ether is a pure, chemically defined acyclic ether used as a solvent in organic chemistry laboratories. It is a volatile, colorless liquid with a characteristic odor and contains no impurities or additives that would render it particularly suitable for a specific use. Therefore, it is classified under tariff item 2909.11.00.

Diethyl Ether Pharmaceutical Intermediate

Diethyl ether used as a pharmaceutical intermediate is a high-purity, chemically defined acyclic ether employed in the synthesis of pharmaceutical active ingredients. It is not excluded by Chapter 29 note 2(e) as it is not an immunological product. The product falls under tariff item 2909.11.00 as it is a chemically defined acyclic ether.

Stabilized Diethyl Ether

Stabilized diethyl ether contains a small amount of BHT (butylated hydroxytoluene) added to prevent peroxide formation during storage and transport. This stabilizer is necessary for preservation and is permitted under Chapter 29 note 1(f). The product remains classified as diethyl ether under tariff item 2909.11.00.

Technical Grade Diethyl Ether

Technical grade diethyl ether with a purity of 95-98% is used for industrial applications such as paint stripping and as a reaction solvent. It is a chemically defined organic compound containing impurities, which is permitted under Chapter 29 note 1(a). The product is classified under tariff item 2909.11.00 as diethyl ether.

1-Methoxy-2-Propanol (Propylene Glycol Monomethyl Ether)

1-Methoxy-2-propanol is an acyclic ether-alcohol derived from methanol and propylene glycol, used in paints and coatings. While ether-alcohols have separate provisions, this specific isomer falls under tariff item 2909.19.00 as an 'other' acyclic ether, being a chemically defined compound per Chapter 29 Note 1(a).

Butyl Methyl Ether

Butyl methyl ether is an acyclic mixed ether from butanol and methanol, used in organic synthesis and as a reaction medium. It is a chemically defined compound under Chapter 29 Note 1(a) and falls under tariff item 2909.19.00 as an 'other' acyclic ether.

Diethyl Ether (Ethyl Ether)

Diethyl ether is a colorless, highly volatile acyclic ether derived from ethyl alcohol, used primarily as a solvent and in organic synthesis. It is a chemically defined compound under Chapter 29 Note 1(a) and falls under tariff item 2909.19.00 as an 'other' acyclic ether.

Diisopropyl Ether

Diisopropyl ether is a branched acyclic ether from isopropanol, used as an extraction solvent and gasoline stabilizer. It is a chemically defined compound under Chapter 29 Note 1(a) and falls under tariff item 2909.19.00 as an 'other' acyclic ether.

Dimethoxymethane (Methylal)

Dimethoxymethane (methylal) is the dimethyl acetal of formaldehyde and an acyclic ether of methanol. Used as a solvent and chemical intermediate, it is a chemically defined compound under Chapter 29 Note 1(a) and falls under tariff item 2909.19.00 as an 'other' acyclic ether.

Ethyl Tert-Butyl Ether (ETBE)

Ethyl tert-butyl ether (ETBE) is an acyclic ether of ethanol and tert-butanol, used as a high-octane biofuel oxygenate. It is a chemically defined compound under Chapter 29 Note 1(a) and falls under tariff item 2909.19.00 as an 'other' acyclic ether.

Industrial MTBE Fuel Oxygenate

This industrial MTBE fuel oxygenate is a chemically defined acyclic ether (2-methoxy-2-methylpropane) used to oxygenate reformulated gasoline. It falls under tariff item 2909.19.00 as an 'other' acyclic ether, consistent with Chapter 29 Note 1(a) for separate chemically defined organic compounds.

Methyl Tert-Butyl Ether (MTBE)

MTBE is an acyclic ether produced from methanol and isobutylene, widely used as a gasoline oxygenate additive. It is a chemically defined compound under Chapter 29 Note 1(a) and falls under tariff item 2909.19.00 as an 'other' acyclic ether.

Methyl Tertiary-Butyl Ether (MTBE) 99% Purity

Methyl tertiary-butyl ether (MTBE) at 99% purity is a colorless, volatile acyclic ether used as a high-octane gasoline additive. It qualifies under tariff item 2909.19.00 as an 'other' acyclic ether, being a separate chemically defined compound per Chapter 29 Note 1(a).

MTBE 99.5% Spectroscopic Grade

Spectroscopic-grade MTBE at 99.5% purity is a chemically defined acyclic ether used as a solvent in analytical and research applications. It falls under tariff item 2909.19.00 as an 'other' acyclic ether, consistent with Chapter 29 Note 1(a) for separate chemically defined organic compounds.

MTBE Gasoline Blending Agent 98.5%

This 98.5% pure MTBE is used for blending into unleaded gasoline to improve combustion efficiency. It qualifies as a separate chemically defined acyclic ether under Chapter 29 Note 1(a) and falls under tariff item 2909.19.00 as an 'other' acyclic ether.

Pure MTBE Chemical Intermediate

Ultra-pure MTBE used as a solvent or intermediate in organic synthesis is a chemically defined acyclic ether. It meets Chapter 29 criteria for separate chemically defined compounds and is classified under tariff item 2909.19.00 as an 'other' acyclic ether.

Refinery-Grade MTBE Octane Booster

Refinery-grade MTBE is a high-purity acyclic ether designed to enhance gasoline octane without aromatics. It adheres to Chapter 29 scope for chemically defined acyclic ethers and is classified under tariff item 2909.19.00 as an 'other' acyclic ether.

Stabilized MTBE for Transport

Stabilized MTBE for transport contains an added anti-dusting agent, which is allowable under Chapter 29 Note 1(g) as long as it does not render the product suitable for a specific use. It remains classified under tariff item 2909.19.00 as an 'other' acyclic ether.

Technical Grade MTBE for Fuel Additives

Technical-grade MTBE with a stabilizer for safe transport is classified as a pure acyclic ether per Chapter 29 Note 1(f) for added stabilizers. It falls under tariff item 2909.19.00 as an 'other' acyclic ether, provided the stabilizer is necessary for preservation or transport.

1,8-Cineole (Eucalyptol)

1,8-Cineole, also known as eucalyptol, is a bicyclic monoterpenoid ether naturally occurring in eucalyptus oil. Its structure contains an oxygen atom within a saturated ring system, classifying it as a cyclanic ether under tariff item 2909.20.00.

Bisabolol Oxide A

Bisabolol oxide A is an epoxide derivative of alpha-bisabolol, featuring a cyclic ether structure with a terpenoid backbone. It is a chemically defined organic compound used in cosmetic formulations for its anti-inflammatory properties, falling under cycloterpenic ethers.

Cedrol

Cedrol is a sesquiterpene alcohol with a cyclic structure, but it does not contain an ether functional group; it is an alcohol. Therefore, it does not meet the definition of a cyclanic, cyclenic, or cycloterpenic ether and should not be classified under this tariff item.

Cineole Acetate

Cineole acetate is a derivative of 1,8-cineole where the acetate group is attached, but the core structure retains the cyclic ether. As a halogenated, sulphonated, nitrated, or nitrosated derivative of a cyclanic ether, it falls under tariff item 2909.20.00 when the ether functionality is predominant.

Farnesyl Acetate

Farnesyl acetate is an ester of farnesol, a sesquiterpenoid alcohol, and does not contain a cyclic ether structure. It is an acyclic compound, so it does not fall under cyclanic, cyclenic, or cycloterpenic ethers.

Geranyl Acetate

Geranyl acetate is an ester of geraniol, which is an acyclic monoterpenoid alcohol. It does not possess a cyclic ether structure, and therefore does not meet the definition of a cyclanic, cyclenic, or cycloterpenic ether.

Khusilal Oxide

Khusilal oxide is an oxide derivative of khusimol, a sesquiterpenoid alcohol from vetiver oil, forming a cyclic ether structure. As a chemically defined cycloterpenic ether, it falls under tariff item 2909.20.00.

Lavandulyl Acetate

Lavandulyl acetate is an ester of lavandulol, a monoterpenoid alcohol with a cyclic structure, but the compound itself is an acetate ester, not an ether. It does not contain an ether functional group and therefore does not fall under this tariff item.

Limonene Oxide

Limonene oxide is an epoxide derived from limonene, a cyclic monoterpene, containing a three-membered ring with an oxygen atom. This epoxide is a cycloterpenic ether, and as a chemically defined compound, it falls under tariff item 2909.20.00.

Linalool Oxide

Linalool oxide is a furanoid cyclic ether formed by the epoxidation of linalool, featuring a five-membered ring with an oxygen atom. It is a chemically defined cyclanic ether, falling under tariff item 2909.20.00.

Menthofuran

Menthofuran is a cyclic ether with a furan ring, derived from peppermint oil. It is a chemically defined cycloterpenic ether, falling under tariff item 2909.20.00.

Nerolidol Oxide

Nerolidol oxide is an epoxide derivative of nerolidol, a sesquiterpenoid alcohol, forming a cyclic ether structure. As a chemically defined cycloterpenic ether, it falls under tariff item 2909.20.00.

Nootkatone

Nootkatone is a sesquiterpenoid ketone with a cyclic structure, but it does not contain an ether functional group. It is primarily a ketone, and therefore does not fall under cyclanic, cyclenic, or cycloterpenic ethers.

Rose Oxide

Rose oxide is a monoterpenoid cyclic ether with a pyran ring, responsible for the characteristic rose scent in geranium oil. As a chemically defined cyclanic ether, it falls under tariff item 2909.20.00.

Sclareol Oxide

Sclareol oxide is an epoxide derivative of sclareol, a diterpenoid alcohol from clary sage, forming a cyclic ether structure. As a chemically defined cycloterpenic ether, it falls under tariff item 2909.20.00.

5-Chloro-2-nitroanisole

5-Chloro-2-nitroanisole is a halogenated and nitrated aromatic ether, specifically a methoxybenzene derivative with chlorine at the 5-position and nitro group at the 2-position. It falls under tariff item 2909.30.00 as an aromatic ether with halogenated and nitrated derivatives.

5-Chloro-2-Nitroanisole Technical Grade

Technical grade 5-chloro-2-nitroanisole contains ≥98% active ingredient with specified stabilizers for industrial use. It remains classified under tariff item 2909.30.00 per Chapter Note 1(f) allowing necessary stabilizers for preservation or transport.

6-Chloro-3-nitro-p-dimethoxybenzene

6-Chloro-3-nitro-p-dimethoxybenzene (also known as 1-chloro-4,5-dimethoxy-2-nitrobenzene) is a specifically named aromatic ether derivative with two methoxy groups, chlorine, and nitro substitution. It is classified under tariff item 2909.30.00 as an aromatic ether with halogenated and nitrated derivatives.

ADK STAB PA-100 Decabromodiphenyl Oxide

ADK STAB PA-100 is a micronized decabromodiphenyl oxide for nylon 6,6 flame retardancy. The Japanese-grade chemical falls under tariff item 2909.30.00 as an enumerated aromatic polybrominated ether, with optimized particle size providing performance benefits.

Ba-210 DE-83R Flame Retardant (OBDPO)

DE-83R (Ba-210) is an octabromodiphenyl oxide formulation for epoxy circuit boards. It is classified under tariff item 2909.30.00 due to predominant OBDPO content meeting subheading specificity, with high thermal stability for lead-free soldering applications.

Decabromodiphenyl Oxide 99% Analytical Reference Standard

99% purity decabromodiphenyl oxide serves as analytical reference for environmental testing labs. It falls under tariff item 2909.30.00 regardless of purity or packaging due to specific chemical identification, with NIST-traceable standards for laboratory use.

Decabromodiphenyl Oxide (DBDPO)

Decabromodiphenyl oxide is a fully brominated aromatic ether used primarily as a flame retardant additive in plastics and textiles. It falls under tariff item 2909.30.00 as a halogenated derivative of aromatic ethers, specifically a brominated diphenyl ether.

Decabromodiphenyl Oxide Technical Grade 98%

Technical grade decabromodiphenyl oxide with 98% purity used in polyurethane foam flame retardancy falls squarely under tariff item 2909.30.00 as the specifically named brominated aromatic ether. Lower purity than analytical standards does not affect classification.

Dimethyl Diphenyl Ether

Dimethyl diphenyl ether (bis(2,6-dimethylphenyl) ether) is a specifically enumerated aromatic diether compound featuring two methoxy-substituted phenyl rings. It qualifies for tariff item 2909.30.00 as an aromatic ether compound.

Dimethyl Diphenyl Ether Heat Transfer Fluid Grade

High-purity dimethyl diphenyl ether formulated for heat transfer applications with minimal anti-oxidants is classifiable in tariff item 2909.30.00 as the pure named compound with allowed stabilizers per Chapter Note 1(f). Widely used in high-temperature heat transfer systems.

Flame Guard 10V0 (Octabromodiphenyl Oxide Blend)

Flame Guard 10V0 contains octabromodiphenyl oxide as primary active for V-0 rated ABS plastics. Although a blend, it is classified under tariff item 2909.30.00 when OBDPO constitutes the principal characteristic, developed for high-impact polystyrene applications.

Octabromodiphenyl Oxide (OBDPO)

Octabromodiphenyl oxide contains eight bromine atoms and serves as a brominated flame retardant for electronics and building materials. It is classified under tariff item 2909.30.00 as a halogenated derivative of aromatic ethers.

Polybromodiphenyl Oxide Mixture DB-10/DB-8

DB-10/DB-8 blend contains both decabromodiphenyl oxide and octabromodiphenyl oxide for cost-optimized flame retardancy. It is classified under tariff item 2909.30.00 as the subheading covers both enumerated compounds, used in polypropylene and other plastics.

Saytex 102E Flame Retardant (Decabromodiphenyl Oxide)

Saytex 102E is a commercial grade of decabromodiphenyl oxide powder used in high-impact polystyrene for TV housings. This specific product falls under tariff item 2909.30.00 due to its chemical identity as the named aromatic ether.

SR-102 Decabromodiphenyl Oxide Powder

SR-102 is a high-purity decabromodiphenyl oxide powder for HIPS and PPE/PS alloys. It meets tariff item 2909.30.00 as the specifically named brominated diphenyl ether, with free-flowing powder form preventing dust issues in compounding.

Bio-Based Diethylene Glycol

Bio-based diethylene glycol is chemically identical to petrochemical 2,2'-oxydiethanol but derived from renewable ethylene oxide, with over 50% bio-carbon content verified by 14C testing. It qualifies as a separate chemically defined organic compound under Chapter 29 Note 1(a) and is classified under tariff item 2909.41.00 as an ether-alcohol.

Diethylene Glycol 99.9% ACS Reagent

Diethylene glycol ACS reagent grade is 2,2'-oxydiethanol with purity ≥99.9% and low residue after ignition, meeting American Chemical Society specifications for laboratory use. It is a separate chemically defined organic compound under Chapter 29 Note 1(a) and falls under tariff item 2909.41.00 as an ether-alcohol.

Diethylene Glycol Aqueous Solution 50%

A 50% aqueous solution of 2,2'-oxydiethanol in deionized water qualifies under Chapter 29 Note 1(d) as a product of heading 29.09 dissolved in water. It is used in heat transfer applications and deicing fluids and is classified under tariff item 2909.41.00 as an ether-alcohol.

Diethylene Glycol Distillation Cut 98%

A 98% distillation cut of 2,2'-oxydiethanol containing 1-2% triethylene glycol qualifies as a separate chemically defined compound under Chapter 29 Note 1(a), as impurities do not preclude classification. It is used in urethane production and falls under tariff item 2909.41.00 as an ether-alcohol.

Diethylene Glycol for Cell Culture Media

Diethylene glycol for cell culture media is sterile-filtered 2,2'-oxydiethanol with endotoxin testing (<0.5 EU/ml) for biopharmaceutical production. It meets USP and Ph. Eur. requirements and is a separate chemically defined organic compound under Chapter 29 Note 1(a), classified under tariff item 2909.41.00.

Diethylene Glycol for Ink Formulations

Low-odor diethylene glycol for ink formulations is 2,2'-oxydiethanol used as a viscosity modifier and humectant in flexographic and gravure inks. It is a separate chemically defined organic compound under Chapter 29 Note 1(a) and falls under tariff item 2909.41.00 as an ether-alcohol.

Diethylene Glycol for Polyester Production

Polymer-grade diethylene glycol for polyester production is 2,2'-oxydiethanol purified with low acetaldehyde content (<10 ppm) for PET resin manufacturing. It is a separate chemically defined organic compound under Chapter 29 Note 1(a) and is classified under tariff item 2909.41.00 as an ether-alcohol.