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pH values of all tested bleaching products as given by the manufacturer and measured by the authors.
| pH according to manufacturer | pH measured with MColorpHastTM | |
| Home-bleaching ≤6% HP | ||
| OP 10CP | 6.5 | 6.5 |
| PNW 16CP | 6.0–7.0 | 5.0 |
| PDW 6HP | 7.0–8.5 | 8.5 |
| In-office-bleaching ≤6% HP | ||
| PZ 6HP | 7.0–8.5 | 8.5 |
| MW 0HP | – | 5.0 |
| SB 6HP | 9.5–10 | 8.0 |
| In-office-bleaching >6% HP | ||
| PZ 25HP | 7.0–9.0 | 9.0 |
| OP 40HP | 6.0–8.5 | 7.5 |
| PD 30HP | 4.8–5.2 | 5.0 |
