ChIN简介页:化学品是否能购得?(Commercial availability of chemicals)
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化学品是否能购得?(Commercial availability of chemicals)

【问题】
     From: Judith Currano
To: CHMINF-L@LISTSERV.INDIANA.EDU
Date: Thursday, October 04, 2001, 3:29:47 AM
Subject: Commercial availability.

I'm looking for the commercial availability of nine compounds. I have
tried CHEMCATS (through SciFinder), Chemfinder.com, Aldrich/Sigma/Fluka,
and Chem Sources, to no avail. If anyone can suggest an alternative or
knows the commercial availability of any of these compounds, I'd
appreciated a tip!

[2-[2-(2-mercaptoethoxy)ethoxy]ethoxy-acetic acid, 200291-35-6, C8H16O5S

23-hydroxy-3,6,9,12,15,18,21-heptaoxatricosane-1-sulfonic acid,
313672-66-1, C16H34O11S

14-hydroxy-3,6,9,12-tetraoxatetradecane-1-sulfonic acid, 313672-65-0,
C10H22O8S

14-mercapto-3,6,9,12-tetraoxatetradecan-1-ol, 248582-03-8, C10H22O5S

17-mercapto-3,6,9,12,15-pentaoxaheptadecan-1-ol, 194425-46-2, C12H26O6S

2-[2-[2-(2-hydroxyethoxy)ethoxy]ethoxy]-ethanesulfonic acid,
173459-90-0, C8H18O7S

2-[2-(2-hydroxyethoxy)ethoxy]-ethanesulfonic acid, 112724-27-3, C6H14O6S

2-[2-[2-(2-mercaptoethoxy)ethoxy]ethoxy]-ethanol, 90952-27-5, C8H18O4S

2-[2-(2-mercaptoethoxy)ethoxy]-ethanol, 5682-36-1, C6H14O3S

Thanks for any help you can give me!

Judith N. Currano currano@pobox.upenn.edu
Chemistry Librarian (215) 898-2177
University of Pennsylvania

【解决途径】
     From: Aleksandr Belinskiy
To: CHMINF-L@LISTSERV.INDIANA.EDU
Date: Thursday, October 04, 2001, 9:20:25 PM
Subject: Commercial availability

Judith,

Alternative source of commercial availability is MDL's ACD, Available
Chemicals Directory, accessibly through ChemWeb. A search (by CAS RN, name,
structure, etc.) and a number of vendors are free, but details about vendors
are fee based (after 30-day free trial).

I checked CAS registry numbers from you list: no data were found (you may
double check). However, for the last [compound
"2-[2-(2-mercaptoethoxy)ethoxy]-ethanol, 5682-36-1, C6H14O3S] an ACD message
indicates that "The CAS number does not have a valid checksum", so, check it.

These compounds may be not commercially available. You may try to analyze the
CAS Registry records for this compounds to figure out are these compounds
commercial available or not. (
- How many records in CA and other sources: if it only 1 record, for example,
and this record is not registered by request of a producer (SO=CAS Registry
Services), this compound is unlikely commercially available.
- Is regulatory information available? If yes, it is good indicator of
commercial availability.
- Is the compound covered by patent? - Ask patent owner: at least at
countries where a patent is valid, nobody could sell the compound without a
patent owner consent. ...

Even a search by CAS RN on Internet may help (probably, not in this case).

Good luck.

Thanks,

Aleksandr Belinskiy
Information Consultant
Falls Church, VA
Phone (703) 533-6568
E-mail: abelinskiy@aol.com

【相关链接】
  ChemFinder
  Sigma-Aldrich Catalog and MSDS
  从ChemWeb.com检索MDL的化学品/厂家目录:ACD
  Chem Sources


Summary by 李晓霞 on 2001-10-10

Last updated by 李晓霞 on 2001-10-10

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