Tween T-20 lauric acid (Polysorbate 20) is a chemically stable nonionic surfactant, but its quality can be affected by storage conditions. To ensure product performance and safety, the storage specifications listed in the Guoli Chemical Product Safety Data Sheet must be strictly followed.
Regarding shelf life, there is no specific value provided in the product database. According to chemical industry practices and the chemical stability of Tween T-20, under recommended storage conditions and with the container kept sealed, the product typically has a shelf life of 2 years from the date of manufacture. For products beyond the shelf life, it is recommended to retest key indicators (such as hydroxyl value, acid value, cloud point, etc.) before use to confirm compliance.
To ensure product quality stability during storage, it is recommended to periodically test the following key indicators:
| Item | Specification |
|---|---|
| Appearance | Light yellow to amber viscous liquid |
| Active Content | ≥97% |
| Hydroxyl Value | 95～110 mgKOH/g |
| Acid Value | ≤2 mgKOH/g |
| Saponification Value | 40～50 mgKOH/g |
| Water Content | ≤3.0% |
| pH of 1% Aqueous Solution | 5.0～7.0 |
| Cloud Point | 76～78℃ |
Before use, check the outer packaging for integrity and ensure the product is within its shelf life. If the product becomes more viscous or slightly cloudy due to low-temperature storage, this is a normal physical phenomenon; allow it to return to room temperature naturally and stir gently before use. This does not affect product performance. This product is widely used as an O/W emulsifier, solubilizer, and wetting agent in cosmetics, pharmaceutical excipients, the food industry, and industrial cleaning.