{"id":48554,"date":"2025-12-03T15:57:06","date_gmt":"2025-12-03T14:57:06","guid":{"rendered":"https:\/\/www.beautydecoded.com\/ingredient\/hydroxypropyl-p-phenylenediamine-hcl\/"},"modified":"2025-12-03T15:57:06","modified_gmt":"2025-12-03T14:57:06","slug":"hydroxypropyl-p-phenylenediamine-hcl","status":"publish","type":"ingredient","link":"https:\/\/www.beautydecoded.com\/en\/ingredient\/hydroxypropyl-p-phenylenediamine-hcl\/","title":{"rendered":"Hydroxypropyl-p-phenylenediamine HCl"},"content":{"rendered":"<p><strong>Ingredient type:<\/strong>HUMECTANT\/WATER-SOLUBLE<\/p>\n<p>\u2728 Role: Hydroxypropyl-p-phenylenediamine HCl is generally used as a color precursor in hair dyes. It helps set color by penetrating the hair fiber and oxidizing to form a color pigment.<\/p>\n<p>  Ingredient type: Water-soluble<\/p>\n<p> \u200d\u2695\ufe0f Safety: this ingredient is generally considered safe when used as directed, although some people may experience allergic reactions.<\/p>\n<p>\u2728 Vegan: Yes, this ingredient is generally synthetic and suitable for vegan formulations.<\/p>\n<p>\u2728 Worth knowing: Although effective for coloring hair, it can be irritating to the skin in some sensitive individuals. A patch test is recommended before use.<\/p>\n<p>  Present in: Mainly present in hair dyes and sometimes in certain hair care products to stabilize color.<\/p>\n<p><strong>Comedogenic rating:\u00a0<\/strong><\/p>","protected":false},"featured_media":0,"parent":0,"menu_order":0,"template":"","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":""},"class_list":["post-48554","ingredient","type-ingredient","status-publish","hentry"],"acf":[],"taxonomy_info":[],"featured_image_src_large":false,"author_info":[],"comment_info":"","_links":{"self":[{"href":"https:\/\/www.beautydecoded.com\/en\/wp-json\/wp\/v2\/ingredient\/48554","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.beautydecoded.com\/en\/wp-json\/wp\/v2\/ingredient"}],"about":[{"href":"https:\/\/www.beautydecoded.com\/en\/wp-json\/wp\/v2\/types\/ingredient"}],"wp:attachment":[{"href":"https:\/\/www.beautydecoded.com\/en\/wp-json\/wp\/v2\/media?parent=48554"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}