Hi,

When piperine is treated with sulfuric acid its color goes from pale yellow to blood red, after a bit of research on the web I learned that the reaction is known and has been used as a way to determine piperine for a long time, but I couldn't find anything on the actual reaction. What's going on? What product of the reaction gives the bloodish red color?

Please help.

I didn't find the right solution from the Internet.



Thanks!