UN 3373 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
BIOLOGICAL SUBSTANCE, CATEGORY B
Hazard Class
6.2
Toxic & Infectious Substances
Classification Code
I4
Packing Group
N/A
Not applicable
Hazard ID No.
606
Kemler code
Transport Category
-
For 1,000-point rule
Tunnel Code
(-)
Tunnel restriction
Variant 2 of 2
BIOLOGICAL SUBSTANCE, CATEGORY B (animal material only)
Hazard Class
6.2
Toxic & Infectious Substances
Classification Code
I4
Packing Group
N/A
Not applicable
Hazard ID No.
606
Kemler code
Transport Category
-
For 1,000-point rule
Tunnel Code
(-)
Tunnel restriction
Check if UN 3373 qualifies for 1.1.3.6 exemption
Calculate small load points and check exemption thresholds
Other Toxic & Infectious Substances (Class 6)
Use this data programmatically
GET /api/adr?un=3373📅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.
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