Final answer:
The hazard class or division for the proper shipping name "Cartridges, small arms" is 1.4S.
Step-by-step explanation:
The hazard class or division for the proper shipping name "Cartridges, small arms" is 1.4S. This indicates that the cartridges pose a low hazard and are considered as Class 1 (Explosives). The "1" in the code signifies the main hazard class, and the ".4S" indicates the compatibility group and the type of explosive. The compatibility group "S" indicates that the cartridges are extremely insensitive to initiation.