This is a recurring disinformation narrative aiming to discredit the OPCW. The OPCW is an independent inter-governmental international organisation with 193 member states - including Russia.
Pro-Kremlin outlets began portraying the OPCW as a pawn in Western geopolitical designs around mid-2018, when the organisation was being granted new powers to assign blame for chemical attacks, especially in the Syrian Douma.
In a joint statement, Australia, Bulgaria, Canada, Czech Republic, Denmark, Estonia, France, Germany, Iceland, Italy, Latvia, Lithuania, the Netherlands, Poland, Slovakia, the United Kingdom of Great Britain and Northern Ireland and the United States of America called for an end to the unacceptable Russian defamation of the OPCW.
The OPCW conducts probes into allegations of chemical weapons' use in Syria, and its findings serve as the basis for publicly available reports and expert notes. The document by the Technical Secretariat offers a detailed response to notes verbales in which both Russia and Syria questioned the credibility and legality of the OPCW Fact-Finding Mission in Douma.
Read similar cases that the OPCW has become a tool for the US and its Western allies , that it is controlled by American, and smeared whistleblowers and doctored evidence to blame Damascus for chemical attack.