Bromocresol purple to make indicator for pH.
Is yellow in solutions with a pH of 5.2 or less and purple at a pH of 6.8 or more.
Aqueous solution may be made at concentrations of 0.4% (w/v).
Forensics Lab Supply Number 0110260.
Formerly Grau-Hall Corporation dba Grau-Hall Scientific.
The quantity of 1 gram is offered for those who require only the least amount of an item, especially for mixing up a stock solution. If a greater amount is required, a lower price per gram can be worked out, depending upon available supply. Place an order for the number of grams that are needed, and add a note to contact you by email before processing an order so that a price may be agreed upon.
Wikipedia reference http://en.wikipedia.org/wiki/Bromocresol_purple
MSDS is at http://physchem.ox.ac.uk/MSDS/BR/bromocresol_purple.html