We have done US cleaning using higher molecular weight alcohols and found them to be rather effective, especially in cleaning beneath low stand off components. Using lower weight and lower boiling alcohols like MeOH, EtOH or IPA just doesn't work well, so why even take the risk, albeit the risk is rather low. Remember that ROSE tester solution (~75% IPA) can get rather warm after awhile and I haven't heard about many (any?) fires related to that testing operation. Rich Kraszewski -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of John Anselmo Sent: Monday, June 29, 2009 10:27 AM To: [log in to unmask] Subject: [TN] IPA o r Methanol in Ultrasonic Cleaner Technet, We are being asked by one of our customers to clean some parts (screws, washers, standoffs, feedthrus) in an ultrasonic cleaner with either Methanol or IPA (spectroscopic grade). The time in the ultrasonics could be up to 1 hour. Does anyone else have experience and recommendations for doing this? My main concern is safety. What type of room or enclosure do we need for this? Thanks, John Anselmo --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------