Name: UN 2399 — 1-METHYLPIPERIDINE
Creator: FreightUtils
License: https://creativecommons.org/licenses/by/4.0/

UN 2399Class 3 — Flammable LiquidsPG II

Packing Group: II; Medium danger
Classification Code: FC
Tunnel Code: (D/E) meaning →; Code governing tunnel passage
Transport Category: 2; For the 1,000-point rule (0 = highest restriction)
Hazard ID No.: 338; Kemler code
Limited Quantity: 1 L; Max per inner package for LQ relief
Excepted Quantity: E2; EQ code for excepted quantity relief

Thresholds — why, not just the verdict

Transport Category

Category 2

×3 points per kg/L — up to 333 kg/L of this substance alone stays under the 1,000-point threshold

Per-substance max

333 kg/L

Per-substance maximum for 1.1.3.6 relief (1.1.3.6.3)

Limited Quantity

1 L

Max per inner packaging for LQ relief (Chapter 3.4)

Excepted Quantity

Max 30 ml/g per inner, 500 ml/g per outer package (Chapter 3.5)

Tunnel Code

(D/E) meaning →

Governs which tunnel categories the load may pass

Hazard Labels Required

Label 3Label 8

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

Check if UN 2399 qualifies for 1.1.3.6 exemption

Calculate small load points and check exemption thresholds

Open calculator →

ADR 2027 (accepted)

ADR 2027 was accepted: depositary notification C.N.395.2026 (9 October 2026) records no objection to the amendments proposed by C.N.252.2026. It applies from 1 January 2027, and ADR 2025 may still be applied until 30 June 2027 (1.6.1.1). (C.N.395.2026)

The ADR 2027 amendments (ECE/TRANS/WP.15/274, ECE/TRANS/WP.15/274/Add.1, ECE/TRANS/WP.15/274/Corr.1) make no change to this entry's Table A columns. Other parts of ADR 2027 may still affect its carriage.

ADR 2025 remains the edition FreightUtils serves and the one that applies until ADR 2027 takes effect on 1 January 2027; after that, ADR 2025 may still be applied until 30 June 2027 (1.6.1.1).

All ADR 2027 Table A changes →