رموز نظام التوحيد القياسي ورموز التعرفة الجمركية - المواد الكيميائية والصناعات المرتبطة 28 - 38
Freight all kinds 
Animal & Animal Products 01-05 
Vegetable Products 06-14 
Animal and Vegetable Fats and Oils 15-15 
Foodstuffs, Beverages and Tobacco 16-24 
Mineral Products 25-27 
Chemicals & Allied Industries 28-38 
Plastics/Rubbers 39-40 
Raw Hides, Skins, Leather, & Furs 41-43 
Wood & Wood Products 44-46 
Pulp of Wood and Fibrous Material 47-49 
Textiles 50-63 
Footwear/Headgear 64-67 
Stone/Glass 68-70 
Precious Stone, Metal, Pearls and Coins 71-71 
Base Metals 72-83 
Machinery/Electrical 84-85 
Vehicles 86-89 
Precision Instruments 90-92 
Arms and Ammunition 93-93 
Miscellaneous Manufactured Articles 94-96 
Works of Art 97-97 
Unique US National HS Codes 98-99 Code
Product Name
280461
Silicon, containing by weight not less than 99.99% of silicon
280469
Silicon, containing by weight less than 99.99% of silicon
280470
Phosphorus
280480
Arsenic
280490
Selenium
280511
Alkali or alkali-earth metals, sodium
280512
Alkali or alkali-earth metals, calcium
280519
Alkali or alkali-earth metals, other than sodium and calcium
280530
Earth-metals, rare, scandium and yttrium, whether or not intermixed or interalloyed
280540
Mercury
280610
Hydrogen chloride (hydrochloric acid)
280620
Chlorosulphuric acid
280700
Sulphuric acid, oleum
280800
Nitric acid, sulphonitric acids
280910
Diphosphorus pentoxide
280920
Phosphoric acid and polyphosphoric acids
281000
Oxides of boron, boric acids
281111
Hydrogen fluoride (hydrofluoric acid)
281112
Hydrogen cyanide (hydrocyanic acid)
281119
Inorganic acids, other than hydrogen fluoride
