Hard to tell, it will probably always available in some form. It is not just our forum, read the post from gulkan with the link from Dr.Elias. I found it interesting to see how many products there are with the chlorine dioxide (if you read the link then you will get the pix).
The Iodine forum went through the same thing, you can't buy 16 oz bottles anymore at full strength, but you can get it at 1/2 strength so you double the dose. The full strength only comes in 1 oz bottles.