Table 5. Test results using the DKG test series “preservative agents, e.g., in external agents”: Right column shows percentage of positive reactions (% pos.).
| Substance | Conc. | Unit | Base | No. of tests | neg. | ? | q | + | ++ | +++ | ir. | % pos. |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Methylisothiazolinone | 0.05 | % | aqu. | 157 | 145 | 2 | 0 | 6 | 4 | 0 | 0 | 6.4 |
| Iodopropynyl butylcarbamate | 0.20 | % | pet. | 161 | 152 | 6 | 1 | 2 | 0 | 0 | 0 | 1.2 |
| Sodium benzoate | 5.00 | % | pet. | 163 | 158 | 2 | 0 | 2 | 0 | 0 | 1 | 1.2 |
| Sorbic acid | 2.00 | % | pet. | 160 | 156 | 2 | 0 | 0 | 1 | 0 | 1 | 0.6 |
| Quaternium-15 | 1.00 | % | pet. | 160 | 160 | 0 | 0 | 0 | 0 | 0 | 0 | 0.0 |
| Benzyl alcohol | 1.00 | % | pet. | 160 | 160 | 0 | 0 | 0 | 0 | 0 | 0 | 0.0 |
| Chloroacetamide | 0.20 | % | pet. | 160 | 160 | 0 | 0 | 0 | 0 | 0 | 0 | 0.0 |
| Chlorhexidine digluconate | 0.50 | % | aqu. | 162 | 161 | 1 | 0 | 0 | 0 | 0 | 0 | 0.0 |
| Diazolidinyl urea (Germall II) | 2.00 | % | pet. | 160 | 160 | 0 | 0 | 0 | 0 | 0 | 0 | 0.0 |
| Imidazolidinyl urea (Germall 115) | 2.00 | % | pet. | 160 | 160 | 0 | 0 | 0 | 0 | 0 | 0 | 0.0 |
| Triclosan | 2.00 | % | pet. | 160 | 160 | 0 | 0 | 0 | 0 | 0 | 0 | 0.0 |
| DMDM Hydantoin | 2.00 | % | aqu. | 160 | 159 | 1 | 0 | 0 | 0 | 0 | 0 | 0.0 |