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| Search Example: Toxicology |
| Question: |
What are the TLV's (Threshold Limit Values) for beryllium? |
| Strategy: |
An easy way to answer this question is to
locate substance information in the "Toxicology" category,
especially in the RTECS database. |
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| Please click on the small screenshots to get larger ones. The large screenshots themselves can also be closed by clicking. |
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| Login: |
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If you do not have an existing STN account:
To open a new STN Easy account, click the blue "Open New Account" button on the STN Easy Home Page and complete and submit the online forms. Within 30 minutes, your STN login ID and password will be sent to the e-mail address you specify. |
If you have an existing STN account:
To log on to STN Easy, simply enter your login ID and password.
Then click "Start Your Session." |
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| Select Search Mode: |
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| The Search Page is displayed. It offers four different
search options: "Easy",
"Advanced",
"CAS
Number" and "Patent
Lookup" Search. The "Defined
Searches" link is available in case Defined
Searches have been created. |
| To find toxicological information, select the "Advanced
Search" tab. |
| The Advanced Search option prompts you to choose
the category of databases you wish to search. Click the "Select
Your Category" button for the list of categories. |
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| Select Databases: |
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| An additional browser window is opened. It displays the list of STN Easy database categories. |
Select the category "Toxicology" and click
the yellow  Database
Folder icon to see the list of databases included in
this category. |
| De-select all but the RTECS (Registry of Toxic Effects of Chemical Substances) database and click "OK". |
| The window closes and you are ready to enter the search terms. |
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| Enter Search Terms: |
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| Pick "Chemical Name" from the first drop-down box and type in the name of the substance. |
| Click the green "Search" button. - Note that the search costs are displayed below the Search button. |
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Helpful HINT: Use the free "Browse
Index" button before clicking "Search" to make sure
that the chemical name you entered is spelled correctly and
is included in the database you have chosen - before you actually
pay for the search.
Simply select the chemical name you wish to search from the "Browse Index" list, then click "Search". |
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| Answer page: |
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| The list of answers is displayed in a table format
on the Answer Page. |
| The RTECS record for beryllium is located. To view
the detailed record, click the blue "Display Answers"
button or directly the title hyperlink. - You may change
the Display Format and Display Style using the selection boxes
at the bottom of the title list. |
| Please note: The display cost is shown to the right
of the answer. |
| Helpful HINT: The "Save" option at the
top of Answer Page would allow you to save your search terms
for Recall
and/or your search query as Defined
Search. |
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| Helpful HINT: With more complex chemical names,
it is often better to start your search in the CAS Number search,
get the CAS Registry answer and then cross over to RTECS with
the toxicology link at the end of the record. By starting with
the CAS Registry record, all the listed synonyms for the chemical
name are searched automatically in the toxicology category. |
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| Display page: |
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| Immediately, the detailed record of RTECS database is displayed - including the relevant Threshold Limit Values. |
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| Helpful HINT: At any time during your STN Easy
search, you can determine the cost of your search activity to
date by clicking "Session
Cost" link on the navigation frame. |
| In order to start a new search, simply click the appropriate search option below the STN Easy Logo on the blue Navigation Frame and a new Search Page is displayed. |
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STN Easy 
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