NMFC 46047 - Self-Reactive Materials | Class N/A

Note 46048: NOTE-Applies on materials regulated by the U.S. Department of Transportation as a Hazard Class 4, Division 4.1, Self-reactive Material, as defined in 49 CFR 173.124 and required to bear a notice to that effect on bills of lading and packaging.

To find the correct freight class for your shipment:

1. Verify NMFC Note item 46048 before tendering. Confirm if your formulation (e.g., polymer initiators, curing agents, reactive resins) requires temperature control or specific packing instructions.
2. Use only U.S. DOT-authorized, UN-rated packagings. Example: combination pack with absorbent inner containers inside a fiberboard box, or UN steel/HDPE drums with secure closures and thermal insulation as SDS indicates.
3. Complete hazmat paperwork precisely: proper shipping name including “Self-reactive,” UN ID, packing method/type, emergency response information, and 24-hour phone. Apply Division 4.1 labels and any required orientation arrows.
4. Book with hazmat-capable carriers and disclose special handling. Note no top-load, segregation from oxidizers and acids, and any temperature controls to prevent dwell-time heat buildup.

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

• Cuts carrier refusals: DOT-authorized packaging aligned to NMFC 46047 reduces rework, refusals, and reconsignment fees.
• Avoids penalties and claims: accurate hazmat papers and labels minimize regulatory fines, damage claims, and clean-up costs.
• Predictable rating: using the correct NMFC item improves quote accuracy when class is not density-driven, clarifying hazmat surcharges up front.
• Operational continuity: proactive temperature and segregation planning lowers incident risk from exothermic decomposition, protecting schedules and brand.