Hazard Class

4.2

Flammable Solids

Classification Code

Packing Group

Medium danger

Hazard ID No.

Kemler code

Transport Category

For 1,000-point rule

Tunnel Code

D/E

Tunnel restriction

Hazard Labels Required

Label 4.2

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

Quantity Limits & Transport

Limited Quantity

Max per inner package for LQ relief

Excepted Quantity

EQ code for excepted quantity relief

Transport Category

0=highest, 4=lowest restriction

Tunnel Restriction

D/E

Code governing tunnel passage

Use this data programmatically

GET /api/adr?un=1923

CALCIUM DITHIONITE (CALCIUM HYDROSULPHITE)