Chalk Powder for Industrial Fillers
Finely ground natural chalk powder (calcium carbonate) used as a filler in paints, plastics, and rubber manufacturing. Classified under HTS 2509.00.20.00 as 'other' chalk, distinct from processed or writing chalk.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If chemically precipitated rather than naturally occurring
Precipitated calcium carbonate is a chemical preparation under 2836, excluded from Chapter 25 natural mineral scope.
If limestone in powder form exceeding certain purity thresholds
Powdered limestone (chiefly CaCO3) may classify under 2521 if not specifically identified as chalk.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure particle size specs match industrial grade to prevent misclassification as pigment; include safety data sheets for dust hazards; declare exact CaCO3 content to avoid 2530 earth color shifts
Related Products under HTS 2509.00.20.00
Natural Chalk Lumps
Rough, unprocessed lumps of natural calcium carbonate chalk mined from chalk deposits, used primarily as a raw material for industrial grinding and processing. This falls under HTS 2509.00.20.00 as 'other' natural chalk, excluding chalk for writing, drawing, or tailors' use as per Chapter 25 notes.
Raw Chalk Rock for Crushing
Large blocks of raw natural chalk stone intended for crushing into aggregate or powder in construction and manufacturing. This raw form qualifies as 'other' chalk under HTS 2509.00.20.00.
Chalk Filler for Cement Production
Ground natural chalk used as a functional filler in Portland cement manufacturing to adjust composition. Falls under HTS 2509.00.20.00 as industrial 'other' chalk, not a finished construction product.
Natural Chalk for Soil Amendment
Granular or powdered natural chalk applied to acidic soils to raise pH levels in agriculture. Classified as 'other' chalk in HTS 2509.00.20.00 for its raw mineral state.
Chalk Ore Concentrate
Concentrated natural chalk ore after basic washing and sizing, but before fine grinding, for further processing. HTS 2509.00.20.00 covers this minimally processed 'other' chalk.
Bulk Natural Chalk for Animal Feed
Coarse natural chalk grit used as a calcium supplement in poultry and livestock feed formulations. Remains under HTS 2509.00.20.00 as unprocessed 'other' chalk.