UN 3257 has 2 classification variants in ADR 2025 — different hazard divisions or descriptions for the same UN number. Each variant may have different transport requirements.
Variant 1 of 2
ELEVATED TEMPERATURE LIQUID, N.O.S., at or above 100 °C and below its flash-point (including molten metals, molten salts, etc.), filled at a temperature higher than 190 °C
Hazard Class
9
Miscellaneous Dangerous Substances
Classification Code
M9
Packing Group
III
Low danger
Hazard ID No.
99
Kemler code
Transport Category
3
For 1,000-point rule
Tunnel Code
(D)
Tunnel restriction
Variant 2 of 2
ELEVATED TEMPERATURE LIQUID, N.O.S., at or above 100 °C and below its flash-point (including molten metals, molten salts, etc.), filled at or below 190 °C
Hazard Class
9
Miscellaneous Dangerous Substances
Classification Code
M9
Packing Group
III
Low danger
Hazard ID No.
99
Kemler code
Transport Category
3
For 1,000-point rule
Tunnel Code
(D)
Tunnel restriction
Check if UN 3257 qualifies for 1.1.3.6 exemption
Calculate small load points and check exemption thresholds
Other Miscellaneous Dangerous Substances (Class 9)
Use this data programmatically
GET /api/adr?un=3257📅Data: UNECE ADR 2025, licensed from Labeline.com. Last verified May 2026
ADR reference data only. Classification is the consignor's legal responsibility. Consult a DGSA for compliance decisions.
Stay updated
ADR 2027 changes, new tools, and freight industry updates. No spam, unsubscribe anytime.
Found an error? Let us know → contact@freightutils.com