| Glossary - H. |  |
| |
|
|
|
|
|
|
 | Hydroquinone - a white crystalline strongly reducing phenol C6H6O2 used especially as a photographic developer, as an antioxidant and stabilizer, and in medicine to remove pigmentation from hyperpigmented areas of skin

|  |  | Hyperpigmentation - excessive coloration of tissues, especially of the skin.

|  |  | Humectant - a substance that promotes retention of moisture

|  |
|