Api-Bioxal is a licensed oxalic based product. It can be distributed via two methods: trickling and vaporising.
 
Packs come in 35g, 175g, 350g, enough to treat 10, 50 and 100 hives respectively if trickling.
 
Do not treat hives when supers are on if you are taking the honey off for human consumption as oxalic acid ages honey, so cannot be sold commercially.
4.2% solution. 
 
Simply dissolve in syrup and trickle 5ml on to seams of bees between frames. 
 
Also suitable for use in vaporisers.
35g sachet treats 10 hives
175g sachet treats 50 hives
350g sachet treats 100 hives
 
Wear suitable safety equipment.