From http://en.wikipedia.org/wiki/Cassette_tapes Cassette tapes are made of a polyester type plastic film with a magnetic coating. The original magnetic material was based on gamma ferric oxide (Fe2O3). Circa 1970, 3M Company developed a cobalt volume-doping process combined with a double-coating technique to enhance overall tape output levels. This product was marketed as "High Energy" under its Scotch brand of recording tapes.[14] Inexpensive cassettes are commonly labeled "low-noise", but typically are not optimized for high frequency response. At about the same time chromium dioxide (CrO2) was introduced by BASF,[15] and then coatings using magnetite (Fe3O4) such as TDK's Audua were produced in an attempt to approach the sound quality of vinyl records. Cobalt-absorbed iron oxide (Avilyn) was introduced by TDK in 1974 and proved very successful. Finally pure metal particles (as opposed to oxide formulations) were introduced in 1979 by 3M under the trade name Metafine. The tape coating on most Cassettes sold today as either "Normal" or "Chrome" consists of Ferric Oxide and Cobalt mixed in varying ratios (and using various processes); there are very few cassettes on the market that use a pure (CrO2) coating. Dave Simonik -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Bev Christian Sent: Thursday, December 18, 2008 10:07 AM To: [log in to unmask] Subject: Re: Way off-topic: CrO2 cassette tape Craig, Assuming all the Cr there is indeed in the form of CrO2, then whether it falls under RoHS is immaterial, as the Cr is present in the +4 oxidation state, not +6. Bev RIM -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Craig Cullum Sent: Thursday, December 18, 2008 10:04 AM To: [log in to unmask] Subject: [TN] Way off-topic: CrO2 cassette tape Hi all, We're expecting a huge snowfall overnight and tomorrow and have been advised not to come to work. So . . . for me it feels like Friday, and here's my question: Do all my old metal-oxide cassette tapes, specifically the chromium CrO2 tapes, fall under RoHS regulations? Hypothetically, if I was in Europe, how would I safely dispose of these tapes? Just wondering. 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