Hello
this topic has been discussed long ago in this FORUM. May be check:
Kits containing items which are regulated by DG
DG: Q no. in label for mixed packing
http://scn.sap.com/thread/1971561
I belive there should be a "forth" one; but I wa snot able to find that.
To my knowledge: per company there exist one solution regarding this; and normally "outside!" of SAP Standard (but using EHS functionality).
Hope this helps.
C.B.