Key precautions for using Tween T-85 include focus on protection, storage, compounding compatibility, and industry-specific dosage, with overall low safety risk but eye protection cannot be ignored.
Detailed Explanation
Tween T-85 (Polyoxyethylene (20) sorbitan trioleate) is a non-ionic surfactant with a flash point > 149°C (closed cup), making it a non-flammable liquid, and according to EC 1272/2008 standard, it is not classified as a hazardous substance. This gives it high safety in routine industrial operations without requiring special explosion-proof or fire prevention measures. However, its main potential health effect is possible mild eye irritation, so eye protection should be prioritized during operation.
In practical applications, when Tween T-85 is used as an O/W emulsifier, attention must be paid to matching its HLB value (approximately 11.0) with the oil phase, and it is recommended to conduct small-scale tests to determine the optimal dosage. Due to its high viscosity (a pale yellow to amber viscous liquid), if it is inconvenient to handle at low temperatures, it can be appropriately warmed (not exceeding 40°C) to improve fluidity, but direct open flame heating is strictly prohibited. When compounded with other surfactants, Tween T-85 shows good compatibility and can be used synergistically with anionic, cationic, and non-ionic auxiliaries.
Avoid contact with incompatible substances such as strong oxidizers, strong acids, and strong bases during use to avoid affecting product performance. The workplace should be well-ventilated to avoid prolonged inhalation of vapors or mists. After operation, thoroughly wash hands and exposed skin, and do not eat, drink, or smoke during operation.
Technical Parameters
| Parameter | Description |
|---|
| Ion Type | Non-ionic Surfactant |
| Appearance | Pale yellow to amber viscous liquid |
| Flash Point (Closed Cup) | > 149°C, non-flammable liquid |
| GHS Hazard Classification | Not classified as hazardous substance (no pictogram, no signal word) |
| Recommended Storage Temperature | 5°C – 40°C |
| Recommended Usage Method | Conduct small-scale test to determine dosage; can be warmed to below 40°C to improve fluidity |
| CAS Number | 9005-70-3 |
Application Recommendations
The key points for using Tween T-85 in different industries are as follows:
- Pesticide Formulations: As an emulsifier and wetting agent, it is recommended to pre-mix it with oil-soluble pesticide active ingredients and then slowly add to water with stirring. The dosage is usually 3%–8% of the total formulation to ensure uniform dispersion of the pesticide solution.
- Cosmetics: Used in formulations such as creams, lotions, and cleansing oils, recommended dosage 1%–5%. It can be combined with Span series emulsifiers to adjust the HLB value for a more stable system.
- Food Processing: As E436 (Polysorbate 85), it must strictly follow local food regulations regarding permitted usage amounts and applicable food categories.
- Metalworking Fluids: When preparing emulsified cutting fluids, it is recommended to first mix Tween T-85 evenly with base oil, then slowly add water phase while stirring. The dosage is generally 5%–15% of the concentrate.
- Coatings and Emulsion Polymerization: Used as an emulsifier, the dosage is approximately 1%–3% of the total monomer weight, effectively promoting monomer dispersion and enhancing emulsion stability.
- Oil Recovery: When used in drilling fluids or stimulation fluid formulations, the dosage should be optimized through experiments based on formation conditions and fluid type. Generally, start from 0.5% and adjust gradually.
Precautions
- Eye Protection: Must wear chemical safety goggles or face shield during operation to prevent liquid splashing into eyes. If eye contact occurs, immediately rinse with plenty of clean water for at least 15 minutes. If irritation persists, seek medical attention promptly.
- Skin Contact: It is recommended to wear protective gloves. If skin contact occurs, remove contaminated clothing and rinse with soap and plenty of water. If irritation or rash occurs, consult a doctor.
- Inhalation Protection: Keep the workplace well-ventilated. If discomfort occurs after inhaling mists, move the person to fresh air immediately. If symptoms persist, seek medical attention.
- Ingestion Handling: Rinse mouth with plenty of water immediately. Do not induce vomiting unless instructed by medical personnel, and immediately contact a poison control center or doctor.
- Storage Requirements: Keep container tightly closed, store in a cool, dry, well-ventilated place, away from heat sources and strong oxidizers. Prevent product from freezing (below 5°C) or degradation from overheating (above 40°C).
- Spill Handling: For small spills, absorb with inert absorbent material (sand, vermiculite) and collect; for large spills, contain to prevent entry into drains or water bodies. Wear goggles, protective gloves, and protective clothing during cleanup.
- Waste Disposal: Do not discharge directly into the environment. Entrust to qualified waste treatment agencies for recycling or incineration, complying with local regulations.
- Low-Temperature Handling: In winter or low-temperature environments, product viscosity increases significantly. It is recommended to warm the product to 20°C–35°C before use, and never use open flame heating.
