The Master Journal List - Clarivate Analytics is part of the Thomson Reuters website and it is mentioned on the webpage that "The Master Journal List includes all journal titles covered in Web of Science." It is not mentioned anywhere that these journals are the ones applying for indexing. However, if you want to be doubly sure, you can also check the list of journals in the 2016 release of the Journal Citation Index (JCR). This is the official list of journals released by Thomson Reuters in 2016.
First of all I would like to thank you for the information you are providing to beginner researchers like me. It helps us a lot. I have an article to be published in a journal listed in the master list of journals indexed in Thomson and Reuters. I have already paid the publication fee. Somebody told me that the journals listed in the "Master Journal List-Clarivate -Analytics" are not journals indexed in the Thomson and Reuters but instead applicants for indexing. And there is "another official list of journals indexed in T&R". On that Master Journal Lists-Clarivate Analytics, I found the name of the Journal where my article is to be published. Additionally, I saw a list of searchable data bases. When I clicked the subject area where i submitted my article, the name of the journal appeared. Is there other way to know whether a journal is indexed in Thomson and Reuters? Is my colleague correct? Is there another" official list" of Journals indexed in Thomson and Reuters other than those found in the clarivate -analytics? Thank you very much. Sincrely, Dr.Gabby