According to the Globally Harmonized System of Classification and Labelling of Chemicals (GHS), papermaking defoamer XS-02 (polyether ester defoamer) is not classified as a hazardous substance. Its toxicological characteristics are as follows: low acute oral toxicity (rat LD₅₀ > 2000 mg/kg), non-irritating to skin and eyes, no skin sensitization; closed cup flash point > 150 °C, non-flammable liquid with no explosive or oxidizing properties; low toxicity to aquatic organisms (fish 96h LC₅₀ > 100 mg/L), with low bioaccumulation potential and good environmental compatibility.
Although this product has a high safety profile, the following guidelines are recommended in practice: Ensure good ventilation in the workplace to avoid formation of aerosols or sprays; wear appropriate protective gloves and goggles during handling to prevent direct contact with skin and eyes; wash hands and exposed skin thoroughly after handling; do not eat, drink, or smoke in the work area.
Containers must be kept tightly closed and stored in a cool, dry, well-ventilated area away from light. The recommended storage temperature range is 5~35 °C. Keep away from heat sources, sparks, open flames, and strong oxidizing agents. The storage area should have containment measures for spills, and floors should be resistant to chemical attack.
In case of a spill, first eliminate the source of the leak and keep unauthorized personnel away. Small spills can be absorbed with inert absorbent materials (e.g., sand, vermiculite) and placed in sealed containers for disposal; for large spills, dike and contain, and transfer using explosion-proof pumps to recovery containers. Do not allow the spill to enter drains, surface water, or groundwater. After cleanup, flush the contaminated area with water and dispose of waste properly.
| Route of Exposure | First Aid Method |
|---|---|
| Inhalation | Move the person to fresh air and keep breathing easy; if symptoms persist, seek medical attention. |
| Skin Contact | Remove contaminated clothing and wash with plenty of soap and water; if irritation or discomfort occurs, seek medical attention. |
| Eye Contact | Immediately flush with plenty of water or saline for at least 15 minutes, lifting eyelids to ensure thorough rinsing; if irritation persists, seek medical attention immediately. |
| Ingestion | Rinse mouth with water, do NOT induce vomiting; if symptoms occur, seek medical attention immediately. |
Suitable extinguishing media include: water fog, alcohol-resistant foam, dry powder, carbon dioxide. Combustion may produce irritating or toxic fumes including carbon monoxide and carbon dioxide. Firefighters should wear self-contained positive-pressure breathing apparatus and full protective clothing. Containers in the fire area should be cooled with water spray. Contaminated firefighting water must be collected and disposed of properly, and must not be discharged into the environment.
Overall, papermaking defoamer XS-02 is a high-safety industrial auxiliary. During use, simply ensure good ventilation, proper protection, sealed storage, and spill containment to effectively avoid safety risks. Its nonionic nature also ensures good compatibility with various auxiliaries in the system without dangerous side reactions.