NMFC 42439 - Marking Chalk, Talc Tailings | Class 55

To find the correct freight class for your shipment:

1. Quote and book as NMFC 42439, Class 55; no density calculation needed for this chalk commodity.
2. Use inner containers (poly bags or lined sachets) sealed and placed in strong corrugated boxes to stop powder sifting and color transfer.
3. Keep moisture out: add a PE liner or desiccant in each box, label “Keep Dry/Powder,” and avoid temperature swings that cause caking.
4. Palletize with slip sheets and full stretch-wrap; avoid overstacking heavy freight on top and segregate from food items to prevent dust contamination.

Note: All classifications are subject to Item 170. Verify with official NMFC publications for the most current requirements.

• Low Class 55 rating helps secure more favorable LTL rates for this dense, non-fragile powder.
• Fixed classification reduces reweigh/reclass disputes, creating predictable quotes across carriers and lanes.
• Non-hazardous status eliminates hazmat surcharges and special handling, speeding tender-to-pickup cycles.
• Sift-proof, moisture-protected packaging cuts cleanup and damage claims, preserving margins and customer confidence.