Inorganic chemicals; organic and inorganic compounds of precious metals; of rare earth metals, of radio-active elements and of isotopes

HS code 28 is a 2-digit chapter in the Harmonized System that covers: Inorganic chemicals; organic and inorganic compounds of precious metals; of rare earth metals, of radio-active elements and of isotopes. Chapter 28 of the Harmonized System (HS) is dedicated to "Inorganic chemicals; organic and inorganic compounds of precious metals; of rare earth metals, of radio-active elements and of isotopes." This pivotal chapter serves as the cornerstone for classifying a vast array of fundamental chemical substances crucial to virtually every industry worldwide. Its scope encompasses pure chemical elements, acids, bases, salts, oxides, and other inorganic compounds, including those of non-metals and common metals. Crucially, it also covers specific organic and inorganic compounds of precious metals, rare-earth metals, radioactive elements, and isotopes, which are often high-value or strategically important. The boundary of Chapter 28 is primarily defined by the 'inorganic' nature of the chemicals, distinguishing them from most 'organic' chemicals classified in Chapter 29, except for specific compounds explicitly included here (e.g., carbon dioxide, carbon monoxide, hydrocyanic acid). Key sub-categories include halogens and sulfur; metallic oxides; inorganic acids; salts of metals; and the highly specialized radioactive elements and isotopes. Accurate classification within Chapter 28 is paramount for trade compliance, as it directly impacts customs duties, import/export regulations, safety standards, environmental controls, and even national security (for dual-use chemicals or radioactive materials). Historically, these chemicals have been the backbone of industrial revolutions, from metallurgy and agriculture to modern electronics and pharmaceuticals, making their trade highly significant and globally interconnected. Major headings within this chapter group similar chemical types, starting with non-metals and their compounds, progressing to inorganic acids, bases, salts, and culminating in the complex classification of precious metal compounds, rare-earth elements, and isotopes.

Sulfuric acid, Sodium hydroxide, Titanium dioxide, Hydrogen peroxide, Anhydrous ammonia, Carbon black, Silicon, Aluminum oxide, Zinc oxide, Calcium carbonate, Potassium chloride, Uranium hexafluoride, Lithium carbonate, Rare earth oxides, Gold chloride, Silver nitrate, Medical radioisotopes (e.g., Cobalt-60), Industrial oxygen, Nitric acid, Phosphoric acid, Ferrous sulfate, Magnesium oxide, Chromium compounds, Boron compounds, Elemental iodine

Misclassification within Chapter 28 frequently arises from confusion with organic chemicals in Chapter 29. The key distinction lies in the presence of carbon-hydrogen bonds; for instance, carbon dioxide (28.11.21) is inorganic, while methane (29.01.10) is organic, despite both containing carbon. Traders often confuse simple inorganic salts with prepared fertilizers of Chapter 31, such as potassium chloride (28.27.39) vs. potassium chloride put up as fertilizer (31.04.20). The context of use or specific formulation is crucial. Another common error involves classifying complex mixtures or preparations containing inorganic chemicals under Chapter 28, when they might belong to Chapter 38 (Miscellaneous chemical products), which covers formulated products like prepared catalysts or activated carbon not specifically provided for elsewhere. Understanding the 'pure' or 'unmixed' nature often guides correct classification.

Major global players in the trade of Chapter 28 goods include China, the United States, Germany, Japan, and India, both as significant producers and consumers. China is a dominant exporter of basic inorganic chemicals, while Germany and the US specialize in high-purity and specialty chemicals. Saudi Arabia is a key exporter of certain inorganic chemicals derived from oil and gas. Tariffs for many basic inorganic chemicals are often low or zero in most major trading blocs, reflecting their role as essential industrial inputs. However, specific compounds, especially those of rare-earth metals or radioactive elements, can face higher tariffs, strict non-tariff barriers, export controls (e.g., dual-use regulations), and require specialized licensing due to their strategic importance or hazardous nature. Free trade agreements often provide preferential tariff treatment, but regulatory compliance remains a critical hurdle.

HS code 28 is a 2-digit chapter code in the Harmonized System maintained by the World Customs Organization. It represents a broad category of goods and contains multiple 4-digit headings and 6-digit subheadings for more specific classifications.