GB 7808-1987

This standard establishes diagnostic criteria and management principles for occupational melanosis, a skin condition caused by long-term exposure to coal tar, petroleum products, or their derivatives in the workplace. It is applied in occupational health settings to guide physicians in diagnosing the disease based on exposure history, clinical symptoms, and skin changes, and to recommend treatment and preventive measures. The standard is relevant for industries such as chemical manufacturing, coal processing, and petroleum refining where workers are at risk of skin hyperpigmentation from these substances.