P17.10
Compatibility Test — Binary Mixtures with Key Co-ingredients
Procedure 10 of 40 · Chapter 17 · §17.2.5
1 table 0 notes
Table 1
| Co-ingredient | Immediate (25°C) | 4 h (25°C) | 24 h (25°C) | 24 h (40°C) | Grade | Notes |
|---|---|---|---|---|---|---|
| Distilled water (control) | Clear | Clear | Clear | Clear | A | — |
| LAS acid (neutralized in situ) | Clear | Clear | Clear | Slight haze | B | Viscosity increase expected |
| AEO-9 (nonionic) | Clear | Clear | Clear | Clear | A | Synergistic compatibility |
| STPP solution | Clear | Clear | Clear | Clear | A | No interaction |
| NaOH (50%, to pH 9) | Clear | Clear | Clear | Clear | A | Normal neutralization |
| Citric acid (to pH 7) | Cloudy | Precipitate | Precipitate | Heavy ppt | C | Acid shock — salting out |
| NaCl (5% w/v) | Hazy | Hazy | Slight haze | Hazy | B | Electrolyte tolerance limit |
| Fragrances (typical) | Clear | Clear | Clear | Clear | A | Hydrotrope effect |
| Opacifier | Milky | Milky | Milky | Milky | A | Expected appearance |