CHM 277: General Chemistry: Citing Sources

For detailed style guidelines see: Chapter 4.3.5.13 Safety Data Sheets

Found through a third-party such as University of Portland MSDS Online:

Cyclohexane; CAS RN: 110-82-7; 650455; ver. 6.8; Sigma-Aldrich: St. Louis, MO, May 25, 2023. Retrieved from University of Portland MSDS Online. https://chemmanagement.ehs.com/9/9849d80f-5ad9-428c-bc44-250b1fe349d5/ebinder/146961324 (accessed 2023-08-15).

Found on manufacturer site:

Cyclohexane; CAS RN: 110-82-7; 227048; ver. 6.9; Sigma-Aldrich: St. Louis, MO, May 24, 2023. https://www.sigmaaldrich.com/US/en/sds/sial/227048 (accessed 2023-08-15).

Citing an experiment or appendix from the course lab manual? Use the ACS format for citing a chapter in a book.

Example:

Bard, R.; Bard, R.; Breuer, K.; Jacob, W.; Osborne, D.; Schacherer, L.; Taylor, B.; Thompson, W.; Valente, E.; Wood, W. Experiment A2: Distillation of a Mixture of Cyclohexane and Toluene. In CHM 375 Organic Chemistry I Laboratory Manual; University of Portland, 2023-2024; pp 25-32.

The Chemical Abstracts Service (CAS) Registry has 204 million organic and inorganic substances. Each substance has been given a unique registry number (RN) and that is the most accurate way to search for information about it. Searching by substance name can be less accurate since there are different naming systems.

The registry number might be referred to as:

CAS Registry Number
CAS RN
CAS No.
CAS Number

The number has dashes which are considered part of the number. For example, the CAS RN for Cyclohexane is: 110-82-7. Include the dashes when searching by CAS RN in various databases, and also when including the number in a citation for a source.