[ RadSafe ] C h e m o t o x i c i t y of thorium?

[Eric D]

This is one of a complete series of articles on Thorotrast - a radiographic
contrast agent that was made up of micro spheres of thorium dioxide.  The
compound was injected.  Use was discontinued when significant adverse health
effects were discovered post use because of how these particles were
distributed in the body.

I had occasion to look into this literature in the early 1990's.

Eric Daxon

-----Original Message-----
From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] On Behalf
Of Baratta, Edmond J
Sent: Monday, June 12, 2006 7:00 AM
To: 'franz.schoenhofer at chello.at'; radsafe at radlab.nl
Subject: RE: [ RadSafe ] C h e m o t o x i c i t y of thorium?

 Franz:

There was a Conference on the "Distribution, Retention, and Late Effects of
Thorium Dioxide" that was published in the ANNALS OF THE NEW YORK ACADEMY OF
SCIENCES, Volume 145, Art. 3 Pages 523-858, (December 1967)that address
this.


Edmond J. Baratta
Radiation Safety Officer
Tel. No. 781-729-5700 x 728
Fax:  781-729-3593
edmond.baratta at fda.gov

-----Original Message-----
From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] On Behalf
Of franz.schoenhofer at chello.at
Sent: Friday, June 09, 2006 10:35 AM
To: radsafe at radlab.nl
Subject: [ RadSafe ] C h e m o t o x i c i t y of thorium?

Dear RADSAFErs,

I stay now for a few months in Poland, working on a project on NORM in
drinking water. Because of numerous discussions inspired by the fact that
the European Union set only a radiation specific limit for radionuclides
including "uranium", though uranium is far more chemotoxic than radiotoxic I
wonder, how the situation is with thorium. I have not found anything useful
about chemotoxicity of thorium in comparison of its (high) radiotoxicity.
Any information, any links available?

Best regards,

Franz

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