HS Code for Wood flour

Wood flour is classified under HS code 4405.00, a specific heading that encompasses both wood wool and wood flour. This classification is determined by the physical state of the wood material. According to the General Rules of Interpretation (GRI) 1, wood flour is defined as wood reduced to a fine powder, typically through grinding or milling processes, which can pass through a specific mesh screen (usually a 0.6 mm aperture). Unlike sawdust, which is a byproduct of sawing and classified under 4401, wood flour is a processed industrial product used primarily as a filler in the manufacture of plastics, explosives, and wood-plastic composites. The classification remains in 4405.00 provided the wood has not been chemically treated or mixed with other substances to the point where it loses its essential character as wood. This heading is unique because it groups two distinct forms of wood—the fibrous, ribbon-like wood wool and the pulverized wood flour—based on their specific mechanical processing levels within Chapter 44.

Products Included

• Finely ground wood powder
• Pulverized wood waste for industrial fillers
• Milled wood cellulose
• Softwood and hardwood flour
• Wood meal used in plastic molding

Common Misclassification

Wood flour is frequently misclassified under HS code 4401.39, which covers sawdust and wood waste. The distinction lies in the particle size and uniformity; sawdust is a coarse byproduct, whereas wood flour is a refined product. Additionally, if the wood flour is chemically activated, it may be confused with HS code 3802.10 (activated carbon), though wood flour is a raw material rather than a treated filtration medium.

FAQ

What is the HS code for Wood flour?

The HS code for wood flour is 4405.00, which also includes wood wool.

How is wood flour distinguished from sawdust in the HS system?

Wood flour is distinguished by its fine, uniform particle size, typically achieved through secondary milling, whereas sawdust (4401) is the direct, coarse residue from primary timber sawing.