When I started CG I used this blog as a guide
That's by Laura Lee on here
I found it super useful while I was shopping and answering questions. Below is a quote from her blog that'll answer your question!
Another blog that I found super useful to guide through products is by Alexjoujou
"HOW CAN YOU TELL IF A PRODUCT IS CG FRIENDLY?
"You read the ingredients label of course! Silicones are very easy to spot with practice. A silicone ingredient with end with -cone, -conol, or -xane. Examples include: dimethicone, dimethiconol, amodimethicone, cyclomethicone, cyclopentasiloxane, and trimethicone. None of these are water soluble, so you cannot use them with the CG method.
Make sure you don't confuse silicones with preservatives, which frequently end in -one (rather than -cone). Methylchloroisothiazolinone, while a mouthful, is a water soluble preservative, and is perfectly CG friendly.
Another little complexity about silicones is that scientists can modify their structure to make them water soluble. These cones are CG friendly, but some people choose to avoid them for the sake of being totally silicone free. They can be removed with cowashing, however. If a silicone ingredient (-cone, -conol, or -xane) is prefaced with PEG or PPG, it is water soluble. So PEG-12 Dimethicone is water soluble, and CG friendly.
Sum up: CG products will be silicone free conditioners, stylers, creams, gels, pomades, sprays, etc. The way to spot a cone is to look for -cone, -conol, or -xane. If there isnt a PEG- or PPG- in front of that cone, it isn't water soluble, and therefore isn't CG friendly."