Search from a website and download the files

Keywords: html linux search download

Question: 

Please help me with this.I want to write a linux code to Go to this link https://www.sigmaaldrich.com/safety-center.html and do a "SDS Search" with the sequence i have in the text file (sequence A3140,A3141,A3142...) So, I want a code to download the PDF files for A3140,A3141 etc from the listenter image description here

Answers: