Is it possible to do well on SAT II in chemistry without taking AP Chem

I have only taken a regular Regents class in Chemistry, as our school does not offer AP Chem and does not have honors classes. I did well in the class and scored a 100 on the regents, so if i do some self study could I score a 700+.

In theory you do not need the AP class to score well on the SAT. The material needed are all in your Chemistry textbook. Depending on your class you might or might not have covered everything though so you might need to self study. The AP classes often give extra insight and better understanding. In our high school you can only take AP chem after you take honors chem so those students have 2 years of chemistry and more time for all the concepts to sink in and solidify. If you will, they gain more fluency.
However, is up to you to gain this on your own by studying and yes you can score a 700. If you still have your textbook use that together with a prep book.

I turned my textbook in at the end of the year, but do you have suggestions for review books? @am9799

Barrons is fine. The level of the test should be similar to a rigorous honors class but your have to have fluency. Try to memorize some stuff like solubility rules etc. Also you should know as much as you can about water, ammonia and the halogens. For example if you get a question on what kind of bonding or molecular geometry does ammonia have you should not try to figure out by scratch on test day. When you study and the book has examples try to memorize those examples so for a lot of the question you will know the answers without thinking much. That’s what I mean with fluency. Obviously you need to understand the concepts and apply them.

Despite what some on College Confidential would lead you to believe, one does not need AP for the SAT Subject Test. Having said that, for chemistry for me, things tended to click for me after having taken AP, but I had already taken the subject test and really had no desire to take it again to try for a higher score.