14Diseases of the skin
Skin disorders involving specific cutaneous structures
Disorders of the epidermis or epidermal appendages
Disorders of skin colour
ED63Acquired hypomelanotic disorders
ED63.1
category
Hypomelanosis due to exposure to chemicals
Definition Loss of skin pigment due to exposure to depigmenting agents such as hydroquinone, which is frequently employed as a cosmetic skin lightener, and industrial chemicals such as 4-tert-butylcatechol (PTBC) and para-substituted phenols (PSP).
Also indexed as
Hypomelanosis due to exposure to chemicals
Nearby in Acquired hypomelanotic disorders
International Classification of Diseases, Eleventh Revision (ICD-11), World Health Organization (WHO) 2019/2021, https://icd.who.int/browse11. Licensed under Creative Commons Attribution-NoDerivatives 3.0 IGO (CC BY-ND 3.0 IGO).
Release 2026-01.
View this entity in the official WHO ICD-11 browser .
This page reproduces WHO classification content for reference. It is not
medical advice and must not be used to diagnose or treat. For coding
decisions, consult the official release and your national coding guidelines.
About · Data & methodology ·
Privacy · Contact