No, but apparently you can order it from a chemist. A russian banker and his secretary were killed in 1995 by the banker's business partner.
With that said, blaming Mossad for this makes zero sense.
"It's the Russians... unless it's anybody else who got the formula from my book (Kindle edition is only $8 on Amazon), Novichok whistle-blower Mirzayanov tells AFP"
"The only other possibility, he said, would be that someone used the formulas in his book to make such a weapon."
(I personally find it a bit difficult to believe they would actually put the formula for dangerous nerve agent in a book but that's what's reported)
> I personally find it a bit difficult to believe they would actually put the formula for dangerous nerve agent in a book
As the author explained, knowing what the chemical is doesn't help you much with making it, and such information was already available for Sarin and others. Producing these chemicals is a difficult engineering challenge, and incredibly dangerous. Even in the professional labs, people died trying to produce them.