Concentrations (ng/g solution) of o-, m- and p-toluidine in one hair waving product
| Solution | o-Toluidine (ng/g) | m-Toluidine (ng/g) | p-Toluidine (ng/g) |
|---|---|---|---|
| Perming lotion | ND | ND | ND |
| Nourishing cream | ND | ND | ND |
| Fixative | |||
| 1st Preparation | 0.27 | 0.06 | ND |
| 2nd Preparation | 0.23 | 0.15 | ND |
| Perming lotion+fixative | |||
| 1st Preparation | 0.17 | 0.01 | ND |
| 2nd Preparation | 0.12 | 0.02 | ND |
The product consisted of three solutions: a perming lotion containing the hair waving ingredients ammonium thioglycolate and ammonium thiolactate; a fixative containing polyquaternium-7—that is, a polyacrylamide; and a nourishing cream; all components contained several ingredients of unknown concentration in the product.
ND, not detected.