: an isomer that is a stereoisomer of a compound having two or more chiral centers and that is not a mirror image of another stereoisomer of the same compound â
A compact disc is a deceptively simple looking device considering the technology required to make it. 1  CDs consist of three layers of materials: 2  A base layer made of a polycarbonate plastic. 3  A thin layer of aluminum coating over the polycarbonate plastic. 4  A clear protective acrylic coating over the aluminum layer.
CDs and DVDs: Like VHS and cassette tapes, CDs and DVDs need to be recycled at special facilities. Most of these discs contain aluminum, lacquer, gold, dyes, glass, silver, and nickel â among other dangerous chemicals and materials. Throwing them away in the trash or recycling can be dangerous. Many of the facilities that process VHS and cassette tapes will also process CDS or DVDs. The CD Recycling Center of America has a database of locations where you can mail in small quantities of DVDs and CDs â along with their jewel boxes â for processing.