"Poppers" changed formula

[Mustardmit]

I'm not suggesting that anyone here uses poppers for anything other than that implied by its legal description "room odoriser."
Most people described it as "amyl nitrate" but the only ingredient I ever saw on the label is isobutyl nitrite.
Now, my question is this:
Something was passed in law in this country (I think in 2007) where isobutyl nitrite became classified as a "controlled substance" and the ingredient was changed to isopropyl nitrite...WHY? What does one do that the other doesn't?
I've read in various forums that the new formula has been responsible for far more health related hazards than the old, so why again would the government change an old -seemingly safe- ingredient for this new -not so safe- one? Weird.

[dothawkes31]

the poppers on my dressing gown are made of metal, are they amyl nitrate ready or will i need to upgrade?

[snags]

"room odoriser"

Would that be the ''back room''? ;-p

[Mustardmit]

not for me snags -I hasten to add ;-)

[craft1948]

I am obviously too old to understand the question.......