OP-21 (octylphenol ethoxylate) belongs to the class of alkylphenol ethoxylates (APEOs) nonionic surfactants. According to the safety data from Guoli Chemical, the product has the following core environmental issues: its octylphenol group is difficult to degrade rapidly in the environment, and the degradation product octylphenol has strong endocrine-disrupting activity and can persist in the environment. The product is clearly classified as "Hazardous to the aquatic environment — Acute hazard category 2" and "Hazardous to the aquatic environment — Chronic hazard category 2", and the GHS label includes the environmental hazard pictogram (GHS09).
At the international regulatory level, APEO substances (including octylphenol ethoxylates and nonylphenol ethoxylates) have been strictly restricted by various environmental regulations. The EU REACH regulation has included octylphenol in the Candidate List of Substances of Very High Concern (SVHC), restricting its use above certain concentrations. Textile industry standards such as OEKO-TEX Standard 100 and ZDHC (Zero Discharge of Hazardous Chemicals) also set strict limits on APEO residues. Therefore, if your application involves export of textiles, leather products, or targets end markets with strict environmental requirements, the use of OP-21 may pose compliance risks.
Regarding test reports: Currently, no third-party environmental test report for OP-21 is directly available in the Guoli Chemical product database. For a complete test report (e.g., SGS test, APEO content test, biodegradability test, etc.), it is recommended to directly contact Guoli Chemical's sales or technical department to confirm whether they can provide batch test reports that meet specific testing standards (e.g., EN 14362-2 for APEO determination in textiles, GB/T 23972, etc.).
| Risk Category | GHS Classification | Hazard Description |
|---|---|---|
| Acute aquatic toxicity | Category 2 | H401: Toxic to aquatic life |
| Chronic aquatic toxicity | Category 2 | H411: Toxic to aquatic life with long-lasting effects |
| Endocrine-disrupting properties | — | The octylphenol group exhibits estrogen-like activity, interfering with aquatic organism reproduction and development |
| Environmental persistence | — | The degradation product octylphenol persists in the environment, with a log Kow of approximately 3.5–4.8 |
| Test Subject | Endpoint | Data Range |
|---|---|---|
| Fish | 96h LC50 | 1–10 mg/L |
| Daphnia | 48h EC50 | 1–10 mg/L |
| Algae | 72h ErC50 | 1–10 mg/L |
Note: The above data are estimated based on components or similar substances; actual values may vary depending on product formulation and test conditions. Data source: Guoli Chemical Product Safety Data Sheet.
1. Alternative evaluation: If the end product needs to comply with regulations such as OEKO-TEX, REACH, or ZDHC, it is recommended to consider using APEO-free nonionic surfactants such as fatty alcohol ethoxylates (AEO series) or branched alcohol ethoxylates as substitutes. Guoli Chemical offers corresponding alternative products.
2. Compliant usage scenarios: If continuing to use OP-21 in industrial fields without APEO restrictions (e.g., some non-export metalworking fluids, industrial cleaning, etc.), strict wastewater treatment and waste management must be implemented to prevent direct discharge into water bodies.
3. Residue monitoring: For processing industries such as textiles and leather, APEO residue testing should be conducted on finished products after using OP-21 to ensure compliance with downstream customer or export destination limit standards.