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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


File Size:More than 191,400 records (08/2019)
File Type:Bibliographic, Numeric, Substance
STN Easy:Yes

Registry of Toxic Effects of Chemical Substances contains factual toxicity data for commercially important substances from research and government reports. Coverage includes irritation data, federal standards and regulations, mutagenicity, tumorigenic effects, acute toxicity and multiple dose toxicity data, carcinogenicity reviews, NIOSH-recommended human exposure limits, reproductive effects, and information on activities by NIOSH, U.S. EPA (Environmental Protection Agency), NTP (National Toxicology Program), and OSHA (Occupational Safety and Health Administration). Sources include journal articles, government reports, and unpublished EPA test submissions (TSCATS). Molecular formulas, RTECS Numbers, CAS Registry Numbers, chemical names, and toxic values are searchable. Structure diagrams are displayable.


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Phone: 9858-799-5000
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Usage Terms

The following use and distribution restrictions apply to your use of the RTECS File on STN. All copyrights are reserved.

Unless specified otherwise in these RESTRICTIONS, CUSTOMER may use copyrighted search results in the following ways:

  1. in copyrighted scientific publications when search results are incidental to the publication and
  2. in reports to a Government Agency that are required by law or by administrative rule.

Search results delivered to CUSTOMER in computer-readable form remain the property of the Database Producer. Unless specified otherwise in these RESTRICTIONS. Recipient may use search results in computer-readable form for the following purposes:

  1. editing or changing the format of search results to create search terms for use with search files or systems;
  2. combining search results with output from other searches, files, or systems to create a consolidated file of search results;
  3. editing the search results to remove irrelevant answers or to change the format of such results.

Recipient shall not use computer-readable search results as a database or part of a database from which hits are selectively retrieved by programmed search, unless Recipient has purchased the right to store search results using the ARCHIVE command or keyword. Recipient may create one printed copy of search results from a computer-readable file of search results at no additional charge. Recipient must destroy the computer-readable search results upon creation of the printed version, unless Recipient has purchased the right to archive records with the ARCHIVE command or keyword. Recipient may purchase the right to redistribute search results to additional users using the REDISTRIBUTE command or keyword.

Enter HELP SHARETERMS for detailed information on the STN Information Keep & Share Program, which allows Recipients to purchase the right to archive and / or redistribute search results from STN databases for internal re-use. Or, visit the STN Information Keep & Share Program for details.

Recipient shall obtain Database Producer's specific written permission for any uses of computer-readable search results other than those listed here. Authorized users may capture, retain and use RTECS file data in any form and on any medium and for any period of time, provided that such data are used exclusively by a single individual who is an authorized user. Said authorized users may reproduce and distribute RTECS file data solely for the purposes of providing said data to other authorized users. No copies of the RTECS Database or any portion thereof may be made for the purposes of replacing the RTECS Database or as a substitute for the license, lease, or purchase of any established service or product.