Product Name: N-Phenylmaleimide Chemical Formula: C10H7NO2 Synonyms: N-Phenyl-2,5-dihydro-2,5-dioxo-1H-pyrrole CAS Number: 941-69-5 Recommended Use: Intermediate for polymers, resins, and specialty chemicals Manufacturer: Reliable details should be checked on packaging or supplier receipt Emergency Contact: Refer to company safety office or local emergency response Contact Phone: Find in company emergency protocols
Classification: Harmful if swallowed, irritating to eyes, respiratory system, and skin GHS Label: Warning symbol, exclamation mark Hazard Statements: Causes serious eye irritation; may cause respiratory irritation; harmful if swallowed Precautionary Statements: Avoid dust inhalation, use only in well-ventilated areas, wear protective gloves and eye protection Potential Health Effects: Inhaling dust can make nose and throat irritated. Swallowing may upset stomach or cause nausea. Skin contact may bring redness or itching.
Chemical Name: N-Phenylmaleimide Purity: Generally ranges from 98% to 100% Impurities: Trace maleic anhydride and aniline depending on grade Molecular Weight: 173.17 g/mol Physical Form: Pale yellow flaky crystals or powder
Inhalation: Move person to fresh air right away; monitor for signs of irritation. If symptoms continue, medical help is necessary. Skin Contact: Immediately wash affected skin with soap and plenty of water. Remove contaminated clothing and shoes; launder before reuse. If redness or pain persists, see a doctor. Eye Contact: Flush eyes gently under running water for 15+ minutes, lifting eyelids during washing. Remove contact lenses if it’s simple. Urgent medical attention is safest. Ingestion: Rinse mouth. Drink water only if person is fully conscious. Medical advice needed as soon as possible. Symptoms of Overexposure: Eye and skin irritation, cough, stomach upset, and headache.
Suitable Extinguishing Media: Dry chemical powder, carbon dioxide, alcohol-resistant foam. Water spray may help cool containers but avoid direct stream on spill. Potential Hazards: Can release toxic gases like CO, NOx during combustion. Powder can form combustible dust clouds in air. Special Protective Equipment: Firefighters need self-contained breathing apparatus and chemical-resistant gear. Evacuate downwind area if heavy smoke forms. Specific Fire Hazards: Thermal breakdown creates hazardous fumes. Heated containers may rupture.
Spill Response: Isolate spill area to stop dust from spreading. Wear mask, goggles, and gloves. Scoop up and place in a dry, sealable drum. Sweep gently to avoid creating dust. Wash contaminated surface with water. Environmental Precautions: Prevent entry into drains, waterways, or soil. Spilled material should not escape to outside environment. Decontamination Methods: Mop area with plenty of water after collecting solid. Use absorbent material for any residue. Collect waste for disposal according to local rules.
Safe Handling: Handle in a chemical fume hood or well-ventilated space. Avoid breathing dust or contacting skin and eyes. Don’t eat, drink, or smoke near the material. Storage Conditions: Store in a dry, cool, well-ventilated room away from strong acids, bases, and oxidizing chemicals. Tightly seal original container. Protect from moisture and sunlight to stop clumping or decomposition. Incompatible Materials: Keep away from strong acids, strong bases, and oxidizers. Personal Hygiene: Wash hands before breaks and at end of shift. Change contaminated clothing.
Engineering Controls: Use exhaust ventilation or hood to keep dust levels down. Local extraction is the best way to cut inhalation risk. Personal Protective Equipment: Gloves: Nitrile or neoprene Eye: Chemical splash goggles Skin: Lab coat or protective apron Respiratory: Dust mask or NIOSH-certified respirator if high airborne concentration exists Exposure Limit: No established TLV or OSHA PEL; it's safest to minimize exposure as much as possible. Washing Facilities: Eye-wash station and safety shower nearby
Appearance: Pale yellow solid; flaky crystal or powder Odor: Very faint or none Melting Point: 84–86°C Boiling Point: Decomposes before boiling Solubility: Low in water; dissolves in acetone, chloroform, benzene Vapor Pressure: Negligible at room temperature Density: About 1.28 g/cm³ pH: Not applicable Flash Point: Above 200°C (method depends on test setup) Other Properties: Stays stable when kept dry; may cake if stored in humid air.
Chemical Stability: Stable under recommended storage conditions Reactive Conditions: Exposure to heat, moisture, acids, strong bases, and oxidizing agents can cause breakdown Hazardous Decomposition: Burning may release noxious fumes like nitrogen oxides and carbon oxides Polymerization: May occur under heat or in the presence of radical initiators
Exposure Routes: Inhalation, skin contact, ingestion Acute Effects: Irritation of eyes, nose, throat, and skin Chronic Effects: No long-term health studies in people, but laboratory tests suggest repeated exposure may lead to organ effects LD50 Data: Animal oral LD50 reported in the range of 1200-3000 mg/kg (rat, oral) Sensitization: No evidence of allergic sensitization from available studies Carcinogenicity: Not listed as carcinogenic by NTP, IARC, or OSHA
Ecotoxicity: Low information on aquatic toxicity; not expected to bioaccumulate, but dust can disturb aquatic environments Mobility in Soil: Not mobile; adheres to soil particles Persistence and Degradability: Breaks down slowly in environment; sunlight and microbes may slowly degrade product Bioaccumulation: Not expected due to low fat solubility Precautions: Prevent large amounts from entering drains, water bodies, or soil
Appropriate Methods: Send waste to licensed chemical disposal facility. Do not allow any residue into drains, water sources, or sewers. Container Disposal: Triple rinse empty containers and offer for recycling or incineration if permitted by local law. Regulations: Handle as hazardous waste under local, state, or federal requirements Disposal Precautions: Avoid dust exposure during transfer or disposal.
Proper Shipping Name: N-Phenylmaleimide UN Number: Not classified as dangerous for transport under most regulations Transport Hazard Class: Not regulated as hazardous Packing Group: Not assigned Special Precautions: Keep containers tightly sealed and protected from moisture. Avoid stacking drums to prevent collapse or leaks in transit.
TSCA Status: Listed in the US Toxic Substances Control Act inventory EINECS/ELINCS: Registered in European Chemical Agency inventory REACH Status: Registration required for import or production in the EU SARA Title III: Not listed as hazardous substance under SARA Section 313 Other Regulations: Subject to standard safe handling rules in workplaces; review country-specific occupational exposure and environmental protection guidelines. Label Requirements: Clear hazard labeling and information sheet must be available at use point.
