You may wish to wait for a real chemist, or cleaning company specialist to reply, but in theory you can wash it off in alcohol. (ethanol would be a waste, but methanol would be OK). Tin chloride is not particularly stable and is likely to have reacted with Cu traces, moisture and so on. So in practice you may have to do a 2 stage process to first complex it and then remove that. Regards Mike -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Don McFarland Sent: Wednesday, August 03, 2011 6:50 PM To: [log in to unmask] Subject: [TN] Removing SnCl2 Any ideas on methods to remove a tin chloride residue that was found on a FR-4 substrate after wave solder. We have done some good homework to find the source, but we are looking for good and proven methods to remove the residues from affected assemblies. Any input is welcome. Regards, Don McFarland ********************************** CONFIDENTIALITY NOTICE: The information in this electronic mail transmission is legally privileged and confidential information intended only for the use of the individual or entity named above. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of the transmission is strictly prohibited. If you have received this transmission in error, delete the message and immediately notify us by telephone at 435.792.4949 or by responding to this email. ********************************** ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------