Isopropyl alcohol IS a primary ingredient in many record cleaning solutions.
Water is the primary ingredient in most record cleaning solutions. Many solutions are alcohol-free, and promote the fact that ensures better protection of the vinyl. There are many good reasons to avoid alcohol when cleaning LPs.
When it comes to ultrasonic cleaning - the topic of this thread - some rely on nothing but water. That includes the Klaudio ultrasonic cleaners, which are excellent. So it seems you have a bit to learn about LP cleaning.