Curcumin

Name:
Curcumin
Detailed information:

Chemistry name:	tumeric yellow; 1,7-bis(4-hydroxymethoxyphenyl)-1,6-heptadiene-3,5-dione; CI 75300
M Formula:	[CH3OC6H3(OH)CH:CHCO]2CH2
Properties:
Orange-yellow needles. Mp 183 C. Soluble in water and ether; soluble in alcohol.
Derivation:
The coloring principle from curcuma.
Use:
Analytical reagent, food dye, biological stain. As an acid-base indicator it is brownish-red with alkalies, yellow with acids (pH range 7.4–8.6); also an indicator for boron.