Re: [PIUG List] search problem, CASRN; catalogs

As Eric Shively said, situations like these demonstrate the value of using =
CASRN to accurately describe chemical compounds (as well as good nomenclatu=
re). Citing compounds only from Chemcats listings is dangerous. Citations=
 to material in any online and e-version of any database, including documen=
t references, needs to have some sort of date stamp or "last accessed on ..=
." indication.

I would hope that any compound in Chemcats (and therefore in someone's cata=
log) has been made at some time or another. I would hope that suppliers of=
 chemicals would not go on "fishing expeditions" and list news compounds th=
at the feel they could make if they had a customer. I suppose stranger (an=
d more devious) things happen. Caveat emptor.

-- Bob Buntrock
Orono, ME
  ----- Original Message -----
  From: Sandy Burcham
  To: PIUG Discussion List @ Listbox
  Sent: Wednesday, January 16, 2008 10:08 AM
  Subject: RE: [PIUG List] search problem, CASRN


  Dear Eric - I very much appreciate your response. I was rxtrtroubled to =
discover just how widespread this problem appears to be and was very much c=
oncerned about losing prior art retrievability. Since some of the cpds li=
sted in Chemcats have never been made giving them a CASRN might not be with=
in the parameters associated with that file , but since they have been publ=
ised in a catalog, cited as prior art - perhaps CA could create a file of w=
ithdrawn CPDS having someother means of being identified .

  Sandy




    -----Original Message-----
    From: "Shively, Eric"
    Sent: Jan 16, 2008 9:57 AM
    To: "PIUG Discussion List @ Listbox"
    Subject: RE: [PIUG List] search problem, CASRN


    Regarding the question raised by Sandy Burcham, the information on com=
mercially available substances in CHEMCATS is provided by the vendors of th=
ose substances. They may withdraw a chemical from commercial availability a=
t any time, at which point the record would be taken off of CHEMCATS. Howe=
ver, after a CHEMCATS listing is withdrawn, the substance record still appe=
ars in the CAS Registry, along with the vendor's name as the source of that=
 substance's registration. So users can contact the vendor for more informa=
tion as needed.

    The concern addressed in this recent discussion highlights the value of=
 identifying substances of interest by CAS Registry Number, because those r=
ecords will continue to be available in the CAS Registry, which is the auth=
oritative source. However, we recognize there is a problem if someone choo=
ses to cite the CHEMCATS record or the supplier's chemical ID number as pri=
or art. We will consider means of helping users deal with that problem.

    Eric Shively

    CAS




----------------------------------------------------------------------------
    From: Sandy Burcham [mailto:cass123_at_earthlink.net]
    Sent: Wednesday, January 16, 2008 8:57 AM
    To: PIUG Discussion List @ Listbox
    Cc: piug_discussion_list_at_v2.listbox.com
    Subject: Re: [PIUG List] search problem, CASRN


    Wendy Warr provided me wirh Ambinter's website and e-mail information. =
 Ambinter responded to my request saying that the weird numbers were not t=
heir numbers either. So far no one has been able to identify the number fo=
rmat. I am extremely upset about what is disappearing prior art. The peop=
le at CAS who are involved with Chemcats couldn't identify the format eithe=
r but didn't seem bothered by the fact that the information hd come from th=
eir database originally and was no longer there-

    Can we, as searchers, allow this prior art to disappear???

    Sandy Burcham


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Received on Thu Jan 17 2008 - 22:17:12