Skip to Main Content
It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.

The SciFinder-n Database: To Find Chemical Reactions

A basic introduction to SciFinder-n, the database produced by the American Chemical Society.


A colorful line.

Search by: Substance Name, CAS Registry Number (unique number assigned to just one substance), Molecular Formula, and more.  The results of your Reactions search will also lead you to substances and references (scholarly journal articles and other documents) for reactions.

Choosing the reactions search from the menu.


CAS SciFinder Training

Everything about SciFinder-n.


Sample search: Enter hydroquinone in the Reactions search box and click the search button. More than 32,000 search results are retrieved. Narrow your search results by choosing options from the left side of the screen, for example, Reactant or Reagent under Substance Role.

Substance Role limits.

Click on View Reaction Detail in the bottom left corner of one of the Reaction Summary boxes to see detailed information on the reaction including the steps to recreate it.

Reactions summary box with View Reaction Detail link.


To find additional references for selected reactions (only one appears on the right side of the Reaction Summary box), click in the small check box in the upper left hand corner of a Reaction Summary box to select it.  After selecting one or more Reaction Summaries, at the top of the screen, click on the References button, then in the pop up menu, Selected Results.

The References button with All Results and Selected Results options.

In SciFinder-n, all types of documents are included in a References search.  On the left side of the next screen, under Document Type, click the Journal box to limit your References search results to scholarly journal articles.

Document Type - Journal

You can narrow your list of results further by adding additional limits from the left side of the screen, for example:  Language - EnglishPublication Year - Set to last 5 years, etc., as shown below.

Language - English

Publication Year 2017-2022


Once you've narrowed your search and found reference you like, click the Full Text button in the bottom left corner of a References box, then in the pop up menu, click Search for Full Text from Pfau Library.

The Full Text button showing the pop up menu with Search for Full Text from Pfau Library, DOI, and View all Sources..


CAS SciFinder Help: Find Reactions by Name, Registry Number, or Document Identifier.

A colorful line.