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FW: Substitute for methylene chloride



Dear colleagues--Sorry if this is a repeat.  I didn't see my earlier post make it onto P2tech. 

Rodney Sobin
Virginia Department of Environmental Quality
Postal: P.O. Box 10009, Richmond, VA 23240-0009
Street:  629 E. Main St., Richmond, VA 23233-2429
Tel. 804-698-4382	fax 804-698-4264  Rsobin@deq.state.va.us
DEQ Innovative Technology http://www.deq.state.va.us/innovtech
Chesapeake Bay Program Innovative Technology http://www.chesapeakebay.net/innovative.htm <http://www.chesapeakebay.net/innovative.html> 
Virginia Environmental Services Network http://www.vesn.org

-----Original Message-----
From:	Sobin,Rodney 
Sent:	Wednesday, June 25, 2003 9:51 AM
To:	'Tammy Allen'; p2tech@great-lakes.net
Subject:	RE: Substitute for methylene chloride

Tammy--

Consider taking a look at hydrofluoroethers (HFEs).  Someone will have to see if HFEs are compatible with the silicone materials and applications your inspector noted.  There is a 1998 article on P2pays on use of HFEs for cleaning by a cardiac pacemaker manufacturer http://www.p2pays.org/ref/02/01813.htm so I'd guess that FDA has taken some look at these compounds.

HFEs are non-ODCs, considered non-VOC, low toxicity, and low flammability but they are greenhouse gases.  Sometimes they are used as a blend with other solvents.  They're pricey but good practice would maximize solvent recovery.  3M manufactures a number of HFEs (3M Novec Engineered Fluids).  There may be other similar products and producers.

I hope this is helpful.

Rod

Rodney Sobin
Air Permitting Program Coordinator
Virginia Department of Environmental Quality
Postal: P.O. Box 10009, Richmond, VA 23240-0009
Street:  629 E. Main St., Richmond, VA 23233-2429
Tel. 804-698-4382	fax 804-698-4264  Rsobin@deq.state.va.us
DEQ Innovative Technology http://www.deq.state.va.us/innovtech
Chesapeake Bay Program Innovative Technology http://www.chesapeakebay.net/innovative.htm <http://www.chesapeakebay.net/innovative.html> 
Virginia Environmental Services Network http://www.vesn.org

	-----Original Message-----
	From:	Tammy Allen [SMTP:tallen@co.pinellas.fl.us]
	Sent:	Wednesday, June 25, 2003 6:59 AM
	To:	p2tech@great-lakes.net
	Subject:	Substitute for methylene chloride

	I received the following e-mail from one of our Air Quality inspectors.
	The facility needs a replacement that would meet FDA's stringent
	requirements.  Any ideas?  See request below...

	An inocular silicon lens manufacturer (contact lenses, eye glasses,
	etc.)asked if there is a substitute to Methylene Chloride use for their
	HSD that meets FDA requirements.  They use Meth Chloride in their
	California plant.  I told him that you would get back with him and the
	success (hopefully) that you've had or will have with Fl Metal steering
	away from Trichlor.  But the kicker is meeting FDA requirements.  They
	use Meth Chloride for the inocular silicon lenses.  FDA is stringet on
	the use of Meth Chloride due to the silicon implant problems.  Have you
	read about substitutes for Meth Chloride.

	Tammy L. Allen
	Senior Environmental Specialist
	Pollution Prevention and Resource Recovery Program
	Pinellas County Environmental Management
	512 S. Ft. Harrison Ave.
	Clearwater, FL  33763

	(727) 464-4761
	Fax (727) 464-3174

	e-mail: tallen@co.pinellas.fl.us

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