title: Save embedded pdf from website
body: <p>I am writing a small C# application to manage our Safety data Sheets (of chemicals) from our suppliers.</p>
  
  <p>At the moment I manually search for the chemical and save the pdf and add a link to the pdf in my program. The problem is I still have many chemical to go so it would be better to automate the process.</p>
  
  <p>For example: A chemical has the following part number: 271004</p>
  
  <p>The link containing the pdf is here:</p>
  
  <p><a href="http://www.sigmaaldrich.com/MSDS/MSDS/PleaseWaitMSDSPage.do?language=EN-generic&amp;country=NL&amp;brand=SIAL&amp;productNumber=271004&amp;PageToGoToURL=http%3A%2F%2Fwww.sigmaaldrich.com%2Fcatalog%2Fsearch%3Finterface%3DAll%26term%3D271004%26N%3D0%26mode%3Dmatch%2520partialmax%26focus%3Dproduct%26lang%3Den%26region%3DNL" rel="noreferrer">Link</a></p>
  
  <p>I have been reading the page source but cannot find a link to the pdf</p>
  
  <p>But my knowledge of html/javascript is to limited at the moment.....</p>
  
  <p>Is there any way to extract the pdf from the website?</p>
  
  <p>Thanks in advance for any advice :)</p>