Diphenylcyclopropenone is a potent hapten. Its vibration frequency has been evaluated. Diphenylcyclopropenone was used in topical immunotherapy.

Lactic acid is fermentation acid from milk or carbohydrates. It occurs in the blood and muscle fluid of man and animals. The lactic acid concentration increases in muscle and blood after vigorous activity. It is also present in other organs including liver, kidney, and thymus gland, and other body…