UN 3373

BIOLOGICAL SUBSTANCE, CATEGORY B

Class 6.2 — Toxic & Infectious Substances2 variants
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.
UN 3373Class 6.2 — Toxic & Infectious SubstancesVariant 1 of 2
BIOLOGICAL SUBSTANCE, CATEGORY B
Packing Group
N/A
Not applicable
Classification Code
I4
Tunnel Code
(-)
Code governing tunnel passage
Transport Category
-
For the 1,000-point rule (0 = highest restriction)
Hazard ID No.
606
Kemler code
Limited Quantity
0
Max per inner package for LQ relief
Excepted Quantity
E0
EQ code for excepted quantity relief
Hazard Labels Required
Label 6.2

These labels must be displayed on packages and vehicle placards in accordance with ADR 2025.

Special Provisions
SP 319

Refer to ADR 2025 Chapter 3.3 for full text of each provision.

UN 3373Class 6.2 — Toxic & Infectious SubstancesVariant 2 of 2
BIOLOGICAL SUBSTANCE, CATEGORY B (animal material only)
Packing Group
N/A
Not applicable
Classification Code
I4
Tunnel Code
(-)
Code governing tunnel passage
Transport Category
-
For the 1,000-point rule (0 = highest restriction)
Hazard ID No.
606
Kemler code
Limited Quantity
0
Max per inner package for LQ relief
Excepted Quantity
E0
EQ code for excepted quantity relief
Hazard Labels Required
Label 6.2

These labels must be displayed on packages and vehicle placards in accordance with ADR 2025.

Special Provisions
SP 319

Refer to ADR 2025 Chapter 3.3 for full text of each provision.

Check if UN 3373 qualifies for 1.1.3.6 exemption
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📅Data: UNECE ADR 2025 (ECE/TRANS/352), via EU Directive 2008/68/EC. Last verified July 2026

ADR reference data only. Classification is the consignor's legal responsibility. Consult a DGSA for compliance decisions.

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