HS Code 38.20 – Anti-freezing preparations and prepared de-icing fluids

HS code 3820 is a 4-digit heading in the Harmonized System that covers: Anti-freezing preparations and prepared de-icing fluids. Heading 3820 covers anti-freezing preparations and prepared de-icing fluids, encompassing a broad range of chemical mixtures designed to prevent freezing or to melt ice. This classification is crucial for products used in diverse applications, from automotive systems and aviation to industrial chillers and household de-icing. The scope includes ready-to-use solutions and concentrates primarily based on glycols (like ethylene glycol or propylene glycol), alcohols, or various salt mixtures. The key is that these are 'prepared' formulations, distinguishing them from pure chemical compounds (e.g., pure ethylene glycol would be in Chapter 29). Sub-categories range from engine coolants and radiator anti-freeze to specialized aircraft de-icing fluids (e.g., Type I, Type IV) and runway de-icing agents. This classification is vital for trade compliance due to the potential environmental impact of some chemicals, safety regulations for handling and transport, and specific performance standards in industries like aviation. Historically, the demand for these products has grown with industrialization and the expansion of transportation networks in cold climates. As part of Section VI, this heading underscores the importance of chemical preparations tailored for specific functional applications, contributing significantly to the operational efficiency and safety across various sectors.

Automotive engine coolants, radiator anti-freeze, windshield washer fluid with anti-freeze, aircraft de-icing fluid (Type I, Type II, Type III, Type IV), runway de-icing agents, industrial chiller anti-freeze, heat transfer fluids (glycol-based), solar panel anti-freeze solutions, household sidewalk de-icers (salt-based, urea-based), railway switch de-icing fluid, marine engine anti-freeze, RV winterizing fluid, heavy-duty engine coolant, commercial vehicle anti-freeze, specialized industrial anti-freeze, pipe anti-freeze solutions, agricultural equipment anti-freeze, geothermal system anti-freeze, refrigeration system anti-freeze.

A common error is classifying pure chemical components like ethylene glycol under 3820; pure chemicals belong in Chapter 29 (e.g., 2905 for ethylene glycol). Heading 3820 is specifically for *prepared* anti-freezing or de-icing formulations. Confusion can also arise with certain salts in Chapter 28 (e.g., 2827 for calcium chloride) if they are imported as pure substances rather than as prepared de-icing mixtures. The key is the 'prepared' aspect and the primary function as an anti-freezing or de-icing agent. Additionally, 3402 (Organic surface-active agents) may be confused if de-icing fluids contain surfactants, but the primary function dictates 3820.

In 2025, the top exporters of HS code 3820 in UN Comtrade data were Germany ($317M, 19% of world exports), Belgium ($295M) and the United States ($240M). World exports came to about $1.7B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

In 2025, the top importers of HS code 3820 in UN Comtrade data were Germany ($116M, 6.7% of world imports), France ($115M) and Canada ($90M). World imports came to about $1.7B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

HS code 3820 is a 4-digit heading under Chapter 38 of the Harmonized System. The first 2 digits (38) identify the chapter, and digits 3-4 (20) specify the heading. This code contains multiple 6-digit subheadings for precise product classification.