PEG-40 Stearate (SG-40) is of low toxicity and non-hazardous. During use, attention should be focused on personal protection, proper storage, and operational procedures; avoiding dust inhalation and eye contact ensures safe use.
Detailed Description
PEG-40 Stearate (SG-40) is a high-purity nonionic surfactant, appearing as a white to slightly yellowish waxy solid at room temperature. Its acute oral toxicity is extremely low (rat LD50 > 5000 mg/kg), it is non-irritating to skin and eyes (tested per OECD 404/405 standards), and it has no sensitization, mutagenicity, or reproductive toxicity. It is classified as non-hazardous and has a high safety profile in use.
Although the product itself exhibits excellent safety, standard procedures should be followed in industrial operations. The melting point is approximately 30–40°C; excessive heat can cause melting and caking, while excessively low temperatures may lead to solidification and degradation. Therefore, special attention to temperature control is required during storage and handling. Its molecular structure is stable, resistant to acid, alkali, and high-concentration salts, and it can be compounded with anionic, cationic, and amphoteric surfactants. However, contact with strong oxidizing agents (such as peroxides, perchlorates, etc.) should be avoided to prevent adverse reactions.
Regarding environmental aspects, the product exhibits low toxicity to aquatic organisms (fish LC50 > 100 mg/L), possesses good biodegradability (complying with OECD 301 standards), and does not tend to accumulate long-term in the environment. Nevertheless, large spills into drains, waterways, or soil should be avoided, and disposal must comply with local environmental regulations.
Handling and Storage Essentials
Personal Protection Recommendations
- Hand Protection: Wear appropriate protective gloves such as nitrile rubber during handling, avoiding prolonged contact.
- Eye Protection: Wear safety goggles to prevent solid particles or dust from entering the eyes.
- Respiratory Protection: If dust or splashing may occur during operations, use a dust mask or respirator.
- Work Environment: Ensure good ventilation. After work, wash hands and exposed skin thoroughly; do not eat, drink, or smoke during operations.
Storage Requirements
- Temperature Range: Recommended storage temperature is 5°C to 35°C to prevent melting and caking at high temperatures or solidification and degradation at low temperatures.
- Warehouse Conditions: Store in a cool, dry, well-ventilated area away from heat sources, flames, and direct sunlight.
- Packaging Management: Keep containers tightly closed; reseal immediately after opening to prevent moisture absorption. Use original packaging or containers made of stainless steel or plastic.
- Incompatible Materials: Avoid storage with strong oxidizers (peroxides, perchlorates, etc.).
- Shelf Life: Under suitable storage conditions, the typical shelf life is 12 months from the date of manufacture; expired product should be retested before use to determine suitability.
Emergency Response Measures
| Emergency Situation | Response Method |
|---|
| Spill / Leak | Small spills: adsorb with inert absorbent material (sand, vermiculite), collect into closed containers. Large spills: dike to contain, then pump to transfer. Prevent entry into drains and waterways. Collect and treat residual washing wastewater. |
| Skin Contact | Immediately flush with plenty of water and soap for at least 15 minutes. Remove contaminated clothing. The product is non-irritating; flushing removes residues. |
| Eye Contact | Gently rinse with running water or physiological saline for at least 15 minutes, keeping eyelids open. If discomfort persists, seek medical attention. |
| Inhalation | Move the person to fresh air away from the exposure source. If discomfort occurs, seek medical attention promptly. |
| Ingestion | Immediately rinse mouth; do not induce vomiting. May drink 1–2 cups of water. If large amounts are ingested or discomfort appears, seek medical attention immediately and show the product information. |
| Firefighting | The product is non-flammable (flash point > 200°C), but may thermally decompose when exposed to fire. Use water mist, foam, dry powder, or carbon dioxide extinguishers. Firefighters should wear self-contained breathing apparatus and full protective clothing. Combustion may release carbon monoxide, carbon dioxide, and minor irritating vapors. |
Application Recommendations
When used in various applications, it is recommended to determine the optimal dosage through experimental trials based on the specific formulation system:
- Personal Care Products (creams, lotions, etc.): As an O/W emulsifier, typical dosage is 1%–5% of the total formulation, forming stable and fine emulsions over a wide pH and temperature range.
- Textile Auxiliaries: When used as a softener, antistatic agent, or leveling agent, recommended dosage should be adjusted according to fiber type and process requirements, typically 0.5%–3% of the working solution.
- Metalworking Fluids: As an emulsifying and lubricating component, it is recommended to use in combination with other additives; the specific proportion should be optimized based on the base oil type and processing conditions.
- Pesticide Formulations: As an emulsifying dispersion carrier, the dosage depends on the active ingredient properties and formulation type; it is recommended to determine through compatibility tests.
Precautions
- Although this product is of low toxicity and non-hazardous, it is still an industrial-use product; keep out of reach of children and do not ingest.
- Handle gently during use to avoid packaging damage and spillage; use tools to avoid generating static sparks.
- Waste disposal should follow local regulations. High-temperature incineration (with energy recovery and exhaust gas purification systems) is recommended; uncontaminated packaging can be recycled.
- Do not discharge large quantities of the product directly into untreated water bodies; introduction to wastewater treatment systems should be gradual under appropriate microbial acclimation.
