NMFC 133500: Not Dead-Burned Magnesia Refractory | Class 50

To find the correct freight class for your shipment:

1. Print the exact description on the BOL: “Magnesia Refractory, Not Dead Burned — NMFC 133500, Class 50.” No density entry is required for rating.
2. Protect against moisture pickup: use poly-lined bags, inner liners in boxes, or tight-closing fiber/steel drums. Stretch-wrap and hood the pallet; add a top sheet and desiccant when humidity is high.
3. For boxed powder, choose double‑wall corrugated with a sealed liner and water‑resistant tape. Unitize 40–50 lb bags or inner cartons on a sturdy pallet, no overhang, and apply corner boards.
4. Separate from foodstuffs and label for dust control. Include an SDS for handling guidance and note “Do Not Top Load” if using fragile paper bags.

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

• Fixed Class 50 simplifies pricing and accelerates quoting, delivering predictable LTL costs without density calculations.
• Non‑hazardous status broadens carrier options and avoids hazmat surcharges, paperwork, and specialized training.
• Right‑sized packaging (drums vs. bags/boxes) cuts spill cleanups and claim risk, reducing accessorials and downtime.
• Accurate NMFC labeling prevents reclass/reweigh disputes, safeguarding margins and improving on‑time performance.