Using the Combined Chemical Dictionary

Using the Combined Chemical Dictionary

Hi and welcome to searching the Combined Chemical
Dictionary. The Combined Chemical Dictionary is an online
resource that contains basic property information for a massive number of chemical compounds. To begin searching, start at Hunter Library’s main page. You’ll see in the middle a tab titled “Articles/Databases”. Select that tab and look for the link
“All Databases A-Z”. Click on that link to reach an alphabetic
list of all our online resources. Once the alphabetic list appears, you’ll be
looking for a resource named “CHEMnetBASE”. CHEMnetBASE contains the Combined Chemical Dictionary, the actual resource we want to search. To find “CHEMnetBASE” select the “C”, scroll
down until you see the link for CHEMnetBASE. Select that link and the resource page will open. When CHEMnetBASE opens, you can see a list of their online resources. We’re specifically interested in the second
item, the “Combined Chemical Dictionary”. Select that link and the search portal to
the Combined Chemical Dictionary will open. Once the search page opens, you will have
several options to search. Some popular ones include drawing structure, searching by chemical name, searching by molecular formula, and searching by CAS registry number. I always recommend searching by the registry
number if you have it. Simply enter the number into the search box,
including the dashes. Then scroll down to the bottom of the screen
and select “Search”. The search, if you use a registry number,
will map you to a single entry for your compound. You will need to click on the compound title
for the entry to open. Once the entry opens, which might take a moment
or two, you can scroll down or expand the screen to look at all of the compound information. You will note that the entry has many pieces of information including main entry name and synonyms, as well as a CAS registry number
which you will want to check to make sure matches the registry number that you entered,
molecular formula, molecular weight, biological information, some use and importance information, and then the physical data is down towards the bottom. You will also see at the very bottom, for most main entries, hazard and toxicity information. You’ll notice that abbreviations are in use
here. To decipher them, simply click the “Help”
link at the top of the page. Once Help appears, select “Abbreviations” on the left and a list of all abbreviations in use will appear.

Daniel Ostrander

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