Span S-80 (CAS: 1338-43-8) is a lipophilic non-ionic surfactant with an HLB value of about 4.3. Common problems during use are usually related to emulsion system design, operating temperature, addition amount, and phase ratio. The following are common abnormalities and troubleshooting directions:
1. Unstable emulsion, layering or demulsification: First check whether the ratio of oil phase to water phase is reasonable. As a W/O emulsifier, Span S-80 usually requires the oil phase to be the continuous phase (recommended oil phase ratio >50%). Secondly, confirm whether the addition amount is sufficient, generally recommended dosage is 1%~5% of the total formula. In addition, Span S-80 is often used in combination with low-HLB emulsifiers (such as Tween series); using it alone may have limited emulsification effect.
2. Difficulty in dissolving or uneven dispersion of the product: Span S-80 is difficult to dissolve in water and should be pre-dissolved and dispersed in the oil phase. It is recommended to add Span S-80 to the oil phase, heat to 40~50°C with stirring to dissolve, and then mix with the water phase for homogenization. If the operating temperature is too low, the product viscosity is high (kinematic viscosity at 25°C is about 1000~2000 mm²/s), making uniform dispersion difficult.
3. Abnormal product appearance (color, odor, layering): The normal state of Span S-80 is an amber to brown viscous liquid. If there is severe color darkening, off-odor, or obvious layering, it may be related to improper storage - recommended storage temperature below 40°C, container tightly sealed, away from strong oxidizers. Do not continue to use deteriorated products; contact the supplier for confirmation.
4. Skin or eye irritation: This product is a skin/eye irritant (H315/H319). Failure to wear protective gloves and goggles during operation may cause discomfort. Emergency measures: In case of skin contact, wash immediately with soap and water; in case of eye contact, rinse with water for several minutes and seek medical attention.
If the problem is still not resolved after completing the above troubleshooting, it is recommended to obtain professional technical assistance through the following channels:
Since the direct customer service phone number and email address of Guoli Chemical are not yet included in the product database, it is recommended that you obtain the latest technical support channels through the "Contact Us" section of the company's official website or the contact information on the product packaging. When communicating, preparing the following information in advance can speed up problem resolution: product name and batch number, usage formula and application conditions, and a detailed description of the abnormal phenomenon (can be accompanied by photos or sample comparisons).