Chapter 28
HTS codes for inorganic chemicals
Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes.
- Headings
- 50
- Tariff lines
- 336
- General duty
- General duty rates from 0.1% to 5.5%, with 103 duty-free lines
Headings in Chapter 28
- 2801Fluorine, chlorine, bromine and iodine4
- 2802Sulfur, sublimed or precipitated; colloidal sulfur1
- 2803Carbon (carbon blacks and other forms of carbon not elsewhere specified or included)2
- 2804Hydrogen, rare gases and other nonmetals16
- 2805Alkali or alkaline-earth metals; rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed; mercury13
- 2806Hydrogen chloride (Hydrochloric acid); chlorosulfuric acid2
- 2807Sulfuric acid; oleum1
- 2808Nitric acid; sulfonitric acids2
- 2809Diphosphorus pentaoxide; phosphoric acid;polyphosphoric acids, whether or not chemically defined5
- 2810Oxides of boron; boric acids1
- 2811Other inorganic acids and other inorganic oxygen compounds of nonmetals13
- 2812Halides and halide oxides of nonmetals11
- 2813Sulfides of nonmetals; commercial phosphorus trisulfide4
- 2814Ammonia, anhydrous or in aqueous solution2
- 2815Sodium hydroxide (Caustic soda); potassium hydroxide (Caustic potash); peroxides of sodium or potassium5
- 2816Hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides, of strontium or barium3
- 2817Zinc oxide; zinc peroxide1
- 2818Artificial corundum, whether or not chemically defined; aluminum oxide; aluminum hydroxide5
- 2819Chromium oxides and hydroxides2
- 2820Manganese oxides2
- 2821Iron oxides and hydroxides; earth colors containing 70 percent or more by weight of combined iron evaluated as Fe2O36
- 2822Cobalt oxides and hydroxides; commercial cobalt oxides2
- 2823Titanium oxides1
- 2824Lead oxides; red lead and orange lead4
- 2825Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides19
- 2826Fluorides; fluorosilicates, fluoroaluminates and other complex fluorine salts8
- 2827Chlorides, chloride oxides and chloride hydroxides; bromides and bromide oxides; iodides and iodide oxides24
- 2828Hypochlorites; commercial calcium hypochlorite; chlorites; hypobromites2
- 2829Chlorates and perchlorates; bromates and perbromates; iodates and periodates6
- 2830Sulfides; polysulfides, whether or not chemically defined5
- 2831Dithionites and sulfoxylates3
- 2832Sulfites; thiosulfates4
- 2833Sulfates; alums; peroxosulfates (persulfates)21
- 2834Nitrites; nitrates7
- 2835Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined12
- 2836Carbonates; peroxocarbonates (percarbonates); commercial ammonium carbonate containing ammonium carbamate15
- 2837Cyanides, cyanide oxides and complex cyanides6
- 2839Silicates; commercial alkali metal silicates4
- 2840Borates; peroxoborates (perborates)5
- 2841Salts of oxometallic or peroxometallic acids17
- 2842Other salts of inorganic acids or peroxoacids (including aluminosilicates whether or not chemically defined), other than azides4
- 2843Colloidal precious metals; inorganic or organic compounds of precious metals, whether or not chemically defined; amalgams of precious metals5
- 2844Radioactive chemical elements and radioactive isotopes (including the fissile or fertile chemical elements and isotopes) and their compounds; mixtures and residues containing these products23
- 2845Isotopes other than those of heading 2844; compounds, inorganic or organic, of such isotopes, whether or not chemically defined5
- 2846Compounds, inorganic or organic, of rare-earth metals, of yttrium or of scandium, or of mixtures of these metals11
- 2847Hydrogen peroxide, whether or not solidified with urea1
- 2849Carbides, whether or not chemically defined7
- 2850Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined, other than compounds which are also carbides of heading 28495
- 2852Inorganic or organic compounds of mercury, whether or not chemically defined, excluding amalgams4
- 2853Phosphides, whether or not chemically defined, excluding ferrophosphorous; other inorganic compounds (including distilled or conductivity water and water of similar purity); liquid air (whether or not rare gases have been removed); compressed air; amalgams, other than amalgams of precious metals5
Documents required to import Chapter 28 goods
Customs paperwork typically required to import these goods into the United States. Conditional items depend on shipment value, transport mode, or origin.
- Commercial InvoiceRequired
- Packing ListRequired
- Bill of Lading / Airway BillRequired
- CBP Entry Summary (7501)Required
Prepared and filed by your customs broker
- CBP Entry / Release (3461)Required
Prepared and filed by your customs broker
- Customs Bond (CBP 301)Conditional
Required for formal entries — generally shipments valued over $2,500
Single-entry or continuous bond, obtained through your broker or a surety
- Importer Security Filing (ISF "10+2")Conditional
Required for ocean freight only
Filed electronically at least 24 hours before loading at the foreign port
- Importer ID Input Record (CBP 5106)Conditional
Required to establish or update your importer-of-record number with CBP
One-time setup for a new importer; not filed per shipment
- Entry Manifest (CBP 7533)Conditional
Alternative to the 3461 for informal, low-value, or contiguous-country entries
- Safety Data Sheet (SDS/MSDS)Required
- EPA TSCA CertificationConditional
Required for chemical substances regulated under TSCA
- EPA Notice of Arrival (Form 3540-1)Conditional
Required for pesticides and devices (typically Ch. 38)
Common questions
- What does HTS Chapter 28 cover?
- Chapter 28 of the US Harmonized Tariff Schedule covers inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes. It contains 50 four-digit headings and 336 tariff lines.
- What is the duty rate for Chapter 28 goods?
- General duty rates from 0.1% to 5.5%, with 103 duty-free lines. The rate that applies depends on the specific tariff line and the country of origin — preferential trade agreements can reduce or eliminate the general rate.
- How do I find the right HTS code in Chapter 28?
- Classification depends on the material, construction, and intended use of the product. Browse the headings on this page, or describe your product in the search box to get a candidate code with its duty rate.