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Re: Alternatives to IPA to swell silicone lenses



 I checked this one out with a friend of mine who is a national expert on contact lens development, runs his own lab testing and developing new materials, has been on the FDA board, etc.  He understands the problem and is of the opinion that IPA is the only material available that fits the task.  He said there used to be another product used for this purpose, but it was environmentally worse and was removed from the market.

 

Jim Lounsbury,

Waste Minimization National Partnership Program, Solid Waste Office,  EPA, Wash DC

PS.  Check out our Partnership Program website at :  www.epa.gov/wastemin



Tammy Allen <tallen@co.pinellas.fl.us>
Sent by: owner-p2tech@great-lakes.net
07/22/2003 11:23 AM AST
Please respond to Tammy Allen

To: p2tech@great-lakes.net
cc:
bcc:
Subject: Alternatives to IPA to swell silicone lenses


Here is a doosy.  I will really be impressed if someone can answer me
back on this one with an alternative...

A silicone lens manufacturer (lens implant for human cornea) currently
uses Isopropyl alcohol (IPA) to soak their lenses in so that the
silicone will swell to assist in QC efforts to evaluate lens quality.
Does anyone know of another non-voc product that will have a similar
affect on silicone to aid in inspecting for imperfections,
contamination, etc.

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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