Molecular formula :
nature : the system by various lichens the blue pigment. Powder blue. Some can be dissolved in water and ethanol and blue. The acidic solution is redden, excessive increase in alkaline solution was changed again, blue. Past a common indicator is less. Color range of pH 5.0-8.0, from the red into the blue.
Notice:Each item can have many explanations from different angels. If you want grasp the item comprehensively,please see below "more details data".