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.
Keywords from Image Description:
Chlorine test for hypo. Chlorine pool indicator suspended above control sodium hypochlorite solution without acetic acid Compare the yellowness of the drop with File Chlorine test for acid hypo Transferred from org en transferred to Commons by User SMasters using de php CommonsHelper br Original text Chemicalinterest talk