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New on STN

January 2020

Changes to Derwent WPI Update numbering and the total number of annual DWPI updates

December 2019

Derwent World Patents Index: Manual Code revision 2020

December 2019

New Korean Patent Full-Text Database KRFULL released

STN User Meetings

Munich, 20.05.2020

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 Summary Sheet


Producer:Chemical Abstracts Service (CAS), USA
File Size:More than 14.4 million records (08/2019)
File Type:Bibliographic
STN Easy:Yes

Toxicology Center covers the pharmacological, biochemical, physiological, and toxicological effects of drugs and other chemicals. TOXCENTER is com­posed of the following subfiles: BIOSIS (1969 to date), CAplus (1907 to date), IPA (1970 to date), and MEDLINE (1953 to date). Sources include abstracts, books and book chapters, bulletins, conference proceedings, journal articles, letters, meetings, monographs, notes, papers, patents, presentations, research and project summaries, reviews, technical reports, theses, translations, unpublished material, web reprints. Records contain bibliographic data, abstracts, indexing terms, chemical names, and CAS Registry Numbers. Online thesauri are available in the Biosystematic Code (/BC), Chemical Name (/CN), Controlled Term (/CT), Geographic Term (/GT), MeSH Tree Number (/MN), Organism (/ORGN), and Supplementary Term (/ST) fields.


Chemical Abstracts Service 
2540 Olentangy River Road
P. O. Box 3012
Columbus, Ohio 43210-0012 
Phone: (+1) 614-447-3600
Fax: (+1) 614-447-3713
Email: help(at)cas(dot)org

Usage Terms

The CAS Information Use Policies which apply to your use of the TOXCNENTER File on STN are explained in detail.

Contents of CAS Information Use Policies

Part 1:
I. Introduction
II. Definitions

Part 2:
III. Authorized Use of CAS Information

Part 3:
IV. Unauthorized Use of CAS Information
V. Special Permission
VI. Further Information

Further details on the STN Information Keep & Share Program.


BIOSIS File Segment

BIOSIS Previews/RN is copyrighted by Biological Abstracts, Inc. (BIOSIS). All rights reserved. No part of the information may be reproduced in hard copy, machine-readable or other form without advance written permission from BIOSIS. Information has been obtained by BIOSIS from public sources believed to be reliable. BIOSIS makes a diligent effort to provide complete and accurate publications and services. However, BIOSIS does not guarantee the accuracy, adequacy, or completeness of any information and BIOSIS MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY OR FITNESS FOR PARTICULAR PURPOSE. BIOSIS disclaims all liability for errors or omissions that may exist and shall not be liable for any incidental, consequential or other damages (whether resulting from negligence or otherwise) including, without limitation, exemplary damages or lost profits arising out of or in connection with the use of these databases. Errors or omissions may be reported to Biological Abstracts, Inc., 2 Commerce Square, 2001 Market St., Suite 700, Philadelphia, PA 19103-7095.


IPA File Segment

This data is copyrighted by the American Society of Health-System Pharmacists. Permission must be obtained from the American Society of Health-System Pharmacists before duplicating this database or any part of this database for the purpose of distribution or sale.


MEDLINE File Segment

MEDLINE is produced by U.S. National Library of Medicine (NLM). NLM represents that the data provided under this Agreement were formulated with a reasonable standard of care. Except for this representation, and as otherwise specifically provided in this Agreement, NLM makes no representation or warranties, expressed or implied. This includes, but is not limited to, any implied warranty of merchantability or fitness for a particular purpose, with respect to the NLM databases, and NLM specifically disclaims any such warranties and representations. Unless otherwise prohibited, organizations or institutions may download small amounts of NLM-produced citations for redistribution. For MEDLINE, this is about 1,000 per month or 12,000 records for each year of coverage. Since NLM makes corrections and enhancements to and performs maintenance on these records at least annually, you should plan to replace or correct the records once a year to ensure that they are still correct and searchable as a group. NLM databases are produced by a U.S. government agency and as such the contents are not covered by copyright domestically. They may be copyrighted outside the U.S. Some NLM produced data is from copyrighted publications of the respective copyright claimants. Users of the NLM databases are solely responsible for compliance with any copyright restrictions and are referred to the publication data appearing in the bibliographic citations, as well as to the copyright notices appearing in the original publications, all of which are incorporated by reference. Users should consult legal counsel before using NLM-produced records to be certain that their plans are in compliance with appropriate laws. All records must be identified as being derived from NLM databases.