According to the GHS classification criteria, OP-21 Octylphenol Polyoxyethylene Ether falls under the following hazard categories: Skin corrosion\/irritation (Category 2), causes skin irritation (H315); Serious eye damage\/eye irritation (Category 2A), causes serious eye irritation (H319); Reproductive toxicity (Category 2), suspected of damaging fertility or the unborn child (H361); Acute aquatic toxicity (Category 2) and Chronic aquatic toxicity (Category 2), toxic to aquatic life with long-lasting effects (H401+H411). GHS pictograms include GHS07 (exclamation mark), GHS08 (health hazard), and GHS09 (environmental hazard). The signal word is "Warning".
In terms of health hazards, skin contact may cause moderate irritation, manifested as redness, dryness, and cracking. Eye contact may cause severe irritation, with symptoms such as pain, tearing, conjunctival congestion, and eyelid swelling. Inhalation of vapors or aerosols generated by heating may irritate the respiratory tract, causing coughing and throat discomfort. Ingestion may lead to gastrointestinal irritation symptoms such as nausea, vomiting, and diarrhea. It is particularly important to note that long-term, high-dose exposure in animal experiments has shown significant reproductive and developmental toxic effects, mainly attributed to the endocrine-disrupting properties (estrogen-like activity) of the octylphenol group. Repeated exposure may also affect the liver and kidneys.
| Safety Indicator | Data | Description |
|---|---|---|
| Oral LD50 (Rat) | >2000 mg\/kg | Low acute oral toxicity |
| Dermal LD50 (Rabbit) | >2000 mg\/kg | Low acute dermal toxicity |
| Fish 96h LC50 | 1–10 mg\/L | Toxic to aquatic life |
| Daphnia 48h EC50 | 1–10 mg\/L | Toxic to aquatic life |
| Algae 72h ErC50 | 1–10 mg\/L | Toxic to aquatic life |
| pH (1% aqueous solution) | 6.0–8.0 | Nearly neutral |
| Flash Point (Closed Cup) | >150℃ | Not flammable |
| Sensitization | Not a skin sensitizer | — |
The environmental risk of OP-21 cannot be ignored. The octylphenol group in the product can gradually degrade in the environment into octylphenol, which has stronger endocrine-disrupting activity, is not readily biodegradable, and is persistent (log Kow approximately 3.5–4.8). Acute toxicity data for fish, daphnia, and algae are all in the range of 1–10 mg\/L, classified as "toxic to aquatic life" and may cause long-term adverse effects on the reproduction and development of aquatic organisms. Therefore, all waste liquids and washing water generated during production and use must not be directly discharged; they must be treated by professional wastewater treatment systems to meet standards before discharge.
In summary, the most critical safety points for using OP-21 can be summarized as follows: ① Wear protective gloves, goggles, and protective clothing throughout the operation; ② Strictly avoid eye contact; if contact occurs, rinse immediately and seek medical attention; ③ Individuals of childbearing age and pregnant women should avoid long-term or repeated exposure (due to reproductive toxicity risks); ④ All waste and washing liquids must not be discharged into water bodies and must be disposed of as hazardous waste in accordance with regulations. Before use, be sure to read the product Safety Data Sheet (SDS) in detail and strictly follow relevant operating procedures.