| abstract |
The present invention relates to a composition for treating keratinous fibers, preferably hair, comprising at least one aromatic sulfonic acid compound represented by the general formula (1) or (2): wherein each R, which may be the same or different, independently represents -H, -NH 2 , or a monovalent hydrocarbon group, or forms a divalent hydrocarbon group together with an adjacent R, provided that at least one R is -NH 2 , or a salt thereof. |