Quote Originally Posted by doftya View Post
Toluene may be the ingredient of largest quantity, but it is not the main ingredient. Like a cup of coffee, the main ingredient isn't water, but water is the ingredient with the most quantity. Toluene is the carrier (as well as the petroleum distillates), and the glue part is actually relatively small. They have to list the MSDS controlled ingredients, but the proprietary ingredients that make the glue work are not listed because they are not MSDS controlled. The information you are looking at is not an ingredients list but a list of ingredients to which there are health hazards.
Toluene is not a glue, or a jelly, or anything else. If you take pure toluene and let it dissolve, the residue (if any at all) is not sticky or goopy. If toluene was the goopy part, it would leave a residue. Toluene is a solvent. It is impossible for a solevent to be a glue. A solvent can be a carrier for a glue, but it cannot be a glue, it simply lacks the chemical properties to make it a glue. As I mentioned earlier, the list on the packaging is not a complete list of ingredients, but a list of MSDS controlled substances. By FDA law, foods and drugs must list all ingredients, but nothing else has to list all ingredients. Paints don't, fuels don't, smokes don't. That's because for most of these prodects, listing the ingredients would be devulging proprietary secrets. If they don't have to list it, they won't. The exception is the listing of MSDS controlled chemicals, which are those that pose health risks. But the regulations are to list only those chemicals, not all of the chemicals.