This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Phthalic acid isomers. Isomers of Phthalic Acid Padleckas has created this image file on January especially for use in the article Phthalic acid Padleckas Jan UTC Benzenedicarboxylic acids
Page 2023 Free-images.com. All images are Public Domain