HS Code for Viscosity improvers
Viscosity improvers are classified under HS code 3811.90. Heading 3811 covers prepared additives for mineral oils or for other liquids used for the same purposes as mineral oils. This includes anti-knock preparations, oxidation inhibitors, gum inhibitors, and viscosity improvers. While specific subheadings exist for anti-knock preparations based on lead compounds, viscosity improvers fall into the "other" category under 3811.90. These products are typically chemical mixtures or polymer solutions (such as polymethacrylates or olefin copolymers) designed to modify the flow characteristics of lubricants or fuels across different temperatures. Classification is driven by the intended use of the preparation as an additive for mineral oils, rather than the chemical identity of the individual components. However, the preparation must be "prepared," meaning it is a mixture or a specific chemical intended for use as an additive.
Products Included
- Viscosity index improvers (VII)
- Lubricating oil additives for viscosity control
- Prepared thickeners for mineral oils
- Polymer-based viscosity modifiers in solvent
- Multi-grade oil additive packages
Common Misclassification
Viscosity improvers are often misclassified in Chapters 39 (Plastics) if they are pure polymers. However, if they are prepared as additives for oil, Heading 3811 takes precedence. They may also be confused with HS code 2710 if they are already blended into a finished lubricating oil. Another confusion arises with HS code 3403 if the product is a lubricant itself rather than an additive.
FAQ
What is the HS code for Viscosity improvers?
Viscosity improvers for mineral oils are classified under HS code 3811.90.
Are viscosity improvers classified as polymers in Chapter 39?
No, when they are prepared specifically as additives for mineral oils, they are classified under 3811 per the Explanatory Notes to Heading 3811.
Industry
Frequently Asked Questions
What is the HS code for Viscosity improvers?
The HS code for Viscosity improvers is 381190 (Oxidation and gum inhibitors, viscosity improvers, anti-corrosive preparations, other prepared additives for mineral oils or liquids used as mineral oils (including gasoline), n.e.c. in heading no. 3811).
How do I classify Viscosity improvers for customs?
Viscosity improvers is classified under HS code 381190 — Oxidation and gum inhibitors, viscosity improvers, anti-corrosive preparations, other prepared additives for mineral oils or liquids used as mineral oils (including gasoline), n.e.c. in heading no. 3811. This is a 6-digit subheading level code.
Is the HS code for Viscosity improvers the same in all countries?
The base HS code 381190 for Viscosity improvers is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.