[EN] DERIVATIVES OF PPD USEFUL FOR COLORING HAIR AND SKIN<br/>[FR] DÉRIVÉS DE PPD UTILES POUR COLORER LES CHEVEUX ET LA PEAU
申请人:NAT UNIV SINGAPORE
公开号:WO2019098948A1
公开(公告)日:2019-05-23
The is provided a compound of formula I or II or physiologically acceptable salts or solvates, or oxidised derivatives thereof: where R1 to R3, R13 and R14 are as defined herein. Also disclosed herein are methods of dyeing hair or (temporarily) tattooing the skin using the compounds of formula I or II (or physiologically acceptable salts or solvates, or oxidised derivatives thereof) in a suitable composition.
Derivatives of PPD useful for coloring hair and skin
申请人:National University of Singapore
公开号:US11129782B2
公开(公告)日:2021-09-28
The is provided a compound of formula I or II or physiologically acceptable salts or solvates, or oxidised derivatives thereof:
where R1 to R3, R13 and R14 are as defined herein. Also disclosed herein are methods of dyeing hair or (temporarily) tattooing the skin using the compounds of formula I or II (or physiologically acceptable salts or solvates, or oxidised derivatives thereof) in a suitable composition.
提供了式 I 或式 II 的化合物或生理上可接受的盐或溶液,或其氧化衍生物:
其中 R1 至 R3、R13 和 R14 如本文所定义。本文还公开了在适当的组合物中使用式 I 或式 II 化合物(或生理上可接受的盐或溶解物,或其氧化衍生物)染发或(暂时)纹身皮肤的方法。
DERIVATIVES OF PPD USEFUL FOR COLORING HAIR AND SKIN
申请人:National University of Singapore
公开号:US20200390670A1
公开(公告)日:2020-12-17
The is provided a compound of formula I or II or physiologically acceptable salts or solvates, or oxidised derivatives thereof:
where R
1
to R
3
, R
13
and R
14
are as defined herein. Also disclosed herein are methods of dyeing hair or (temporarily) tattooing the skin using the compounds of formula I or II (or physiologically acceptable salts or solvates, or oxidised derivatives thereof) in a suitable composition.
Development of novel alternative hair dyes to hazardous para-phenylenediamine
Peptide Reactivity Assay, minimal cumulative penetration through excised skin and an intrinsic ability to colour and preserve the nuance when applied on bleached hair. The lower skin permeation and sensitizing potential are absolutely crucial and give a clear advantage of ourproducts over other standards. These novel PPD hair dyes show significantly less hazard potential than PPD and may, upon further