Polyether L-61 (Poloxamer 181) is a non-ionic high-molecular-weight surfactant with a low toxicity level. According to the GHS classification in the product safety data sheet, this product is classified as Skin Irritation Category 2 (causes skin irritation), Serious Eye Damage/Eye Irritation Category 2 (causes serious eye irritation), and Specific Target Organ Toxicity - Single Exposure Category 3 (may cause respiratory irritation). The signal word is "Warning," indicating a moderate to low level of hazard, not a highly toxic or extremely poisonous substance.
From a practical safety perspective, polyether L-61 has low vapor pressure and low volatility at room temperature, so it does not release large amounts into the air under normal operation. The main risks to humans are concentrated in direct contact and inhalation of vapors/aerosols: prolonged or repeated skin contact can cause dryness, defatting, and irritation; splashing into the eyes can cause significant irritation and discomfort; inhalation of vapors generated by heating or spray may lead to respiratory irritation. However, this product is not classified as carcinogenic, mutagenic, or reprotoxic. Under normal industrial use scenarios, the risk is fully controllable as long as appropriate personal protective equipment (chemical safety goggles, chemical-resistant gloves, protective clothing) is worn.
Regarding environmental impact, polyether L-61 has a water hazard class of WGK 1 (slightly hazardous to water), which is the lowest hazard level in the German water hazard classification system, indicating a relatively mild impact on the aquatic environment. This is primarily due to its relatively mild ecotoxicological properties as a non-ionic surfactant and its lower biological toxicity compared to anionic surfactants.
Nevertheless, attention should still be paid: after a large spill into water bodies, the inherent properties of the surfactant can reduce surface tension, potentially affecting water reoxygenation and aquatic life; the product has a certain persistence in the environment, with a moderate natural degradation rate, and should not be directly discharged into sewers, surface water, or soil. Enterprises should comply with relevant regulations such as the "Law of the People's Republic of China on Water Pollution Prevention and Control," collect wastewater containing this product, and send it to qualified units for treatment. Common treatment methods such as biochemical treatment (activated sludge process) or advanced oxidation can effectively degrade such polyether-type surfactants.
| Hazard Indicator | Level/Classification | Description |
|---|---|---|
| Skin corrosion/irritation | Category 2 (H315) | Causes skin irritation |
| Serious eye damage/eye irritation | Category 2 (H319) | Causes serious eye irritation |
| Specific target organ toxicity (single exposure) | Category 3 (H335) | May cause respiratory irritation |
| Water hazard class (WGK) | WGK 1 | Slightly hazardous to water |
| Signal word | Warning | Moderate to low hazard |
| Pictogram | Exclamation mark | — |
In industrial applications, the safety of polyether L-61 can be effectively ensured through the following measures:
Although polyether L-61 is not a highly hazardous chemical, attention should still be paid during use and storage: store in a cool, dry, well-ventilated place, recommended temperature 5–40°C, keep container tightly closed; keep away from strong oxidizers and ignition sources; wear chemical safety goggles and chemical-resistant gloves (e.g., nitrile rubber) during operation; wash skin thoroughly after handling; if eye contact occurs, rinse immediately with plenty of water for at least 15 minutes and seek medical attention; empty containers may contain harmful residues, do not reuse without cleaning.