Re: S-35 Volatility

["Wesley M. Dunn" <WDUNN@brc1.tdh.state.tx.us>]

In regards to the notes on S-35 volatility, I ask the same question
we did when this first arose (mid-80's?):

Is this a problem?

ALI S-35 = 1 mCi

The typical vial of S-35 used is 1 mCi or less.  Most individual
research labs use much less than 100 mCi/year.  If one individual
opened all 100 mCi, 0.1% = 100 uCi = 10% ALI IFF they snorted the
entire volatile fraction.  Is this really a reasonable scenario?

NOTE: It was still "strongly recommended" (e.g., I don't recall if we
allowed any exceptions) that ALL vials be initially opened in an
operating fume hood.

Wes
*********************************************************************
Wesley M. Dunn, C.H.P., Administrator      512-834-6688
Licensing Branch                           512-834-6690 (fax)
(Texas) Bureau of Radiation Control        wdunn@brc1.tdh.state.tx.us
*********************************************************************