packing-groups-i-ii-iii

name	packing-groups-i-ii-iii
description	Use when determining packing group requirements. Covers the criteria for each PG, the implications for packaging + quantity limits, and how PG affects roadside-stop scenarios.

Packing Groups I Ii Iii

Packing Group (PG) reflects degree of danger. PG I = highest. PG III = lowest. Affects packaging strength, quantity limits, and labeling.

PG I — Great danger

Most strict packaging. Lowest quantity limits per shipment. Examples: hydrazine, fuming nitric acid.

PG II — Medium danger

Strong packaging. Standard quantity limits. Most common PG (acetone, sulfuric acid, gasoline-type materials).

PG III — Minor danger

Less strict packaging. Higher quantity limits before bulk requirements kick in. Examples: kerosene, diesel fuel (when offered as hazmat).

Determining PG

Tied to physical properties: flash point (flammables), toxicity (Class 6.1), corrosivity. Specified in 49 CFR 173 for each class.

Why it matters at roadside

Inspector verifies PG → packaging code → labels match. PG II load in PG III packaging is a violation.

Where this fits in X3 Compass

Applied in the X3 Compass Hazmat Center — the vertical add-on for hazmat-hauling motor carriers.