RE: CAS Registry Numbers

 -----Original Message-----
 From: Shobe, Dave
 Sent: Friday, May 18, 2001 2:51 PM
 To: 'Doug Smith'
 Subject: RE: CAS Registry Numbers
 I don't know about the first 2 fields, but the last field is an
 "error-detecting" digit which is determined from the first two fields.
 336607-92-2 is a valid number, then 336607-92-3 will not be a valid number,
 and neither will 336607-93-2, etc.  I don't know whether it detects
 transposition errors like 336607-29-2.
 --David Shobe
 Süd-Chemie Inc.
 phone (502) 634-7409
 fax     (502) 634-7724
 email  dshobe -x- at -x-
 -----Original Message-----
 From: Doug Smith [mailto:dsmith -x- at -x-]
 Sent: Friday, May 18, 2001 10:16 AM
 To: 'chemistry -x- at -x-'
 Subject: CCL:CAS Registry Numbers
 Can someone explain the structure of a CAS registry number and how it is
 generated?  According to the CAS web site, 336607-92-2 is the most recent
 CAS Registry Number as of this morning.  I know there is no chemical meaning
 or significance to the numbers, but what is each of the three fields and how
 are the numbers assigned?
 > ___________________________________________
 > Douglas A. Smith, Ph.D.
 > Row2 Technologies Inc.
 > 200 Lanidex Plaza
 > Parsippany, NJ 07054
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 > Fax: +1 973-581-6312
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 > E-mail: dsmith -x- at -x-
 > ___________________________________________
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