Tween 60 (Polyoxyethylene (20) sorbitan monostearate) exhibits excellent performance in terms of human safety. According to the current classification criteria of the Globally Harmonized System of Classification and Labelling of Chemicals (GHS), this product is not classified as a hazardous chemical. Its acute oral toxicity is extremely low, with an oral LD50 in rats greater than 5000 mg/kg, placing it at a practically non-toxic level. Under normal use conditions, it poses no systemic hazard to humans. However, direct contact with high-concentration undiluted liquid may cause mild, transient irritation to the skin and eyes, and prolonged or repeated exposure does not result in specific systemic hazards. This is a key reason why Tween 60 is widely used in areas with direct human contact, such as the food industry, cosmetics, and pharmaceutical preparations—it has been approved as an additive by multiple countries' food safety regulations and pharmacopoeias.
In terms of environmental impact, based on existing ecotoxicological data, Tween 60 poses no significant hazard to aquatic organisms. As a non-ionic surfactant, it can gradually biodegrade in the environment and does not persist in the ecosystem. Nevertheless, any industrial product should avoid direct discharge into natural water bodies to prevent eutrophication or unnecessary burden on aquatic ecosystems. During use and disposal, basic environmental protection regulations should be followed, and leakage or cleaning wastewater should not be discharged into surface water, groundwater, or sewage systems. Overall, Tween 60 is an environmentally friendly surfactant with low ecological risk.
| Safety Indicator | Parameter/Description |
|---|---|
| Hazard Classification | Non-hazardous substance (not classified as hazardous chemical by GHS) |
| Acute Oral Toxicity (Rat LD50) | > 5000 mg/kg (practically non-toxic level) |
| Skin Irritation | Contact with concentrated product may cause mild, transient irritation |
| Eye Irritation | Splashes of concentrated product may cause mild irritation |
| Flash Point (Closed Cup Method) | > 149 °C (no flammability or explosion risk under normal conditions) |
| Aquatic Ecotoxicity | No significant hazard to aquatic organisms |
| Biodegradability | Gradually biodegradable, no persistent bioaccumulation |
Although Tween 60 has high safety, it is still recommended to follow basic protective measures during industrial operations: Wear chemical safety goggles and protective gloves (butyl rubber or neoprene recommended); maintain good ventilation in work areas; wash hands thoroughly with soap and water after handling. When handling high-temperature molten products, take extra care to prevent burns and splashes. For end-use applications in food, cosmetics, and pharmaceuticals, comply with relevant industry regulations regarding addition levels and purity.