Paper defoamer XS-02 (polyether ester defoamer) is a nonionic defoamer primarily composed of polyoxyethylene polyoxypropylene ether fatty acid esters. According to the Globally Harmonized System of Classification and Labelling of Chemicals (GHS), this product is not classified as a hazardous substance and does not fall under hazardous chemicals. Under normal use conditions, it poses no significant risk to human health or the environment.
From a human health perspective, the acute toxicity of this product is extremely low — the oral LD50 for rats is greater than 2000 mg/kg, classified as low toxicity. It is non-irritating to skin and eyes and has no skin sensitization potential. This means that during routine handling, even accidental contact will not cause severe irritation or allergic reactions. However, as a chemical product, it is still recommended to wear protective gloves and goggles during operation to avoid prolonged direct contact.
From an ecological impact perspective, this product has low toxicity to aquatic organisms (fish 96h LC50 greater than 100 mg/L), is not bioaccumulative, and is readily biodegradable, exhibiting good environmental compatibility. This means it will not accumulate in the food chain or cause persistent damage to aquatic ecosystems, fully meeting the environmental requirements of clean production in the modern paper industry.
| Item | Parameter |
|---|---|
| Hazard Classification | Non-hazardous substance |
| Acute Toxicity (oral, rat) | LD50 > 2000 mg/kg (low toxicity) |
| Skin Corrosion/Irritation | Non-irritating |
| Serious Eye Damage/Eye Irritation | Non-irritating |
| Skin Sensitization | Non-sensitizing |
| Flammability | Non-flammable liquid, closed cup flash point > 150 °C |
| Explosiveness | None |
| Oxidizing Properties | None |
| Aquatic Ecotoxicity | LC50 (fish, 96h) > 100 mg/L (low toxicity) |
| Bioaccumulation | Not bioaccumulative |
| Biodegradability | Readily biodegradable |
Paper defoamer XS-02 is widely used in scenarios such as papermaking pulping black liquor, paper machine white water circulation, coating color, surface sizing, industrial water treatment, and water-based ink/adhesive systems. Its nonionic nature provides excellent compatibility with various anionic and cationic additives in the system, without causing side reactions or precipitation. It achieves ideal defoaming and foam suppression effects at very low addition levels, offering outstanding cost-effectiveness.