May Luk on tue 16 sep 08
Hello all;
Where can I obtain RELIABLE safety data on rare earth oxides. (praseodymium=
, neodymium, erbium etc) I am getting conflicted information. In a fairly n=
ewly published glaze book, it says praseodymium is highly toxic, but an int=
ernet search reports that it has low toxicity and only the firing fumes are=
toxic.=20
Thank you in advance for your time
May
Brooklyn NY=0A=0A=0A
John Hesselberth on tue 16 sep 08
On Sep 16, 2008, at 12:35 PM, May Luk wrote:
> Where can I obtain RELIABLE safety data on rare earth oxides.
> (praseodymium, neodymium, erbium etc) I am getting conflicted
> information. In a fairly newly published glaze book, it says
> praseodymium is highly toxic, but an internet search reports that
> it has low toxicity and only the firing fumes are toxic.
Hi May,
The reference I always rely on is Sax "Dangerous Properties of
Industrial Materials". It is very expensive -- over $1100 --so ask
your library to borrow a copy for you. Large libraries should have
one. It is now in the 11th edition. My 8th edition which was
published in 1984, does not have a lot of info on the rare earths. It
does have a summary statement saying that, in general, the rare
earths are moderately to highly toxic. The oral toxicity is usually
low, peritoneal toxicity is very high, and subcutaneous is moderate
to high. Maybe the 11th edition has more. But Sax is THE standard to
my knowledge. Sax also gives references for more detailed research.
Regards,
John
John Hesselberth
http://www.frogpondpottery.com
http://www.masteringglazes.com
Neal on tue 16 sep 08
The supplier you plan to buy from should be able to
give you a material safety data sheet (MSDS) for all
chemicals you purchase. (If you're in the U.S.,
change the "should be able to" to "must upon request".)
You can google the name of any chemical plus "MSDS"
to find MSDSs on most things. I found this one for
praseodymium fluoride: http://tinyurl.com/5wovab.
I'm not sure what form of praseodymium you would use.
Neal O'Briant
Raleigh, NC
| |
|
