To make a solution that is orange-yellow in solutions with a pH of 5.2 or less and purple at a pH of 6.8 or more.
Solution of 20% ethanol may be made at concentrations of 1.0% (w/v).
Limited quantity on hand.
Forensics Lab Supply Number 0110261.
Formerly Grau-Hall Corporation dba Grau-Hall Scientific.
MSDS is at http://www.business_services.oregonstate.edu/property/msds/DATA/6267.htm