P17.9
Thermal Stability Test — Accelerated Storage at 40°C / 75% RH
Procedure 9 of 40 · Chapter 17 · §17.2.4
1 table 0 notes
Table 1
| Material Category | Colour Change (max. ΔHazen) | Active Matter Change (max.) | pH Change (max.) | Odour Change | Disposition |
|---|---|---|---|---|---|
| Anionic surfactants | +30 Hazen units | ±2.0% absolute | ±0.5 units | No significant change | Accept |
| Nonionic surfactants | +50 Hazen units | ±3.0% absolute | ±0.5 units | No rancidity | Accept |
| Builders (STPP, zeolite) | +20 Hazen units | N/A (inorganic) | ±0.3 units | No change | Accept |
| Polymers (CMC, PVP) | No visible darkening | N/A | ±0.5 units | No burnt odour | Accept |
| Enzyme granules | No visible change | Activity ≥90% of initial | ±0.5 units | No ammonia odour | Accept |
| Bleaches (percarbonate) | No yellowing | AvOx ≥95% of initial | ±0.5 units | No chlorine odour | Accept |