Amyl nitrate and other poppers

Amyl nitrate and butyl nitrate are powerful drugs that can give you an almighty burst of dizzy energy for a couple of minutes.
» urban75.com

Poppers are all about nitrates, that's what does the trick. But before you pop, you take your pick. Amyl nitrate, butyl nitrate, isobutyl nitrate. They are all in the alkyl nitrate family of compounds. All the alkyl nitrates act on the body in nearly identical fashion, but isobutyl nitrate is the most potent of them all. Amyl nitrate is sometimes thought to be more potent, but it is actually less potent. It was chosen over isobutyl nitrite to treat heart ailments simply because it's cheaper to manufacture.
» allaboutpoppers.com

Amyl nitrate was discovered in 1857, and it used to be used for the treatment of angina. It was packed in thin glass vials, which were crushed to release the volatile nitrate. Common street names include amyl nitrate, amyl poppers, poppers, Rush, snappers or liquid gold.
» www.drugtest.freeserve.co.uk

Amyl nitrate usually comes in small, mesh-covered ampules that are popped or snapped to release the vapors. Butyl nitrate is sold in small bottles in "head shops" or in special stores advertised as a room odorizer or liquid incense. Nitrates are especially used in the gay population as a muscle relaxant and a vasodilating agent to enhance orgasm; the perception of time is also altered.
» www.adhl.org

In the UK, butyl nitrate is used more than amyl nitrate.
» thesite.org