© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Chemical Name: Methyl Nadic Anhydride
Common Names: 5-methyl-2,3-dicarboxylic anhydride, MNA
Chemical Formula: C10H6O3
Appearance: Transparent, colorless crystals or white to pale yellow solid
Odor: Faint, acrid smell
Classification: Irritant to skin, eyes, and respiratory tract
Main Risks: Contact leads to burning or stinging sensations, inhalation may trigger coughing and sore throat
Environmental Hazard: Harmful to aquatic life with long-lasting effects
Chronic Impact: Prolonged exposure increases risk of developing sensitivity or allergic reactions
Substance: Pure Methyl Nadic Anhydride, single component
Purity: Typically above 99% in commercial and industrial supplies
Impurities: Trace levels of related organic acids or anhydrides may be present from synthesis processes
Eye Contact: Rinse thoroughly with plenty of water, remove contact lenses if present, seek medical advice if irritation persists
Skin Contact: Wash affected area with soap and water, remove contaminated clothing, watch for rash or blisters
Inhalation: Move to fresh air immediately, rest and seek assistance if coughing or shortness of breath develops
Ingestion: Do not induce vomiting, rinse mouth carefully, seek medical attention without delay
Suitable Extinguishing Media: Use dry chemical, carbon dioxide, or foam – water spray for larger fires
Hazardous Combustion Products: Emits acrid fumes, carbon oxides. Incomplete combustion risks more toxic byproducts
Protective Equipment: Firefighters wear self-contained breathing apparatus and chemical-resistant clothing to limit exposure
Spill Response: Ventilate area, avoid breathing dust or fumes
Containment: Cover with inert absorbent, prevent material from entering drains or soil
Cleanup: Collect and store in sealed, labeled containers for proper disposal – wear gloves, goggles, and dust mask
Handling: Avoid skin and eye contact, minimize release of dust with careful transfer, use only with adequate ventilation
Storage: Store in cool, dry location away from acids, bases, or moisture sources; tightly sealed containers prevent hydrolysis and degradation
Incompatibility: Reacts with strong bases, acids, water, and oxidizing agents – separate these materials in storage rooms
Engineering Controls: Local exhaust and fume hoods recommended for routine work
Personal Protective Equipment: Chemical-resistant gloves, safety goggles or face shield, protective lab coat, NIOSH-approved respirator if dust or fumes present
Work Practices: Do not eat, drink, or smoke in areas with anhydride exposure, clean surfaces regularly to prevent residue build-up
Molecular Weight: 174.16 g/mol
Melting Point: Ranges around 94 to 96°C
Boiling Point: Decomposes before boiling
Solubility: Insoluble in water, dissolves in many organic solvents
Vapor Pressure: Low at room temperature
Decomposition: Moisture and heat speed up breakdown; releases acidic vapors as it decomposes
Stability: Stable under recommended storage, breaks down in presence of water or strong acids/bases
Reactiveness: Generates heat and fume clouds with water, forms acids
Incompatible Materials: Avoid storing with oxidizers, compounds that speed decomposition
Acute Effects: Strong irritant to eyes, skin, mucosal tissue; coughing, nausea likely after inhalation
Chronic Exposure: Sensitization risks with repeated or prolonged skin contact, allergic contact dermatitis may develop
Other Toxicity Data: Low vapor pressure means accidental inhalation is less frequent, but handling powders without protection can cause acute symptoms quickly
Environmental Fate: Degrades to organic acids in soil and water
Aquatic Toxicity: Toxic to aquatic invertebrates in significant concentrations
Persistence: Not considered highly persistent, but chronic small spills can add up over time
Waste Handling: Collect all residue and contaminated absorbent in approved sealed drums
Disposal: Send for chemical incineration or authorized hazardous waste facility pickup – do not release to drain or landfill
Regulatory Compliance: Follow regional and national waste management laws for anhydride-containing chemicals
Shipping Type: Typically shipped as a solid in fiber drums or sealed metal containers
Hazard Labeling: Marked as corrosive, irritant; requires full documentation during shipment
Handling Measures: Protect containers from moisture, impacts, and high temperatures during transport
Regulation Status: Subject to workplace exposure standards for irritant chemicals in many regions
Label Requirements: Standard hazardous chemical labeling with risk, safety, and precautionary statements
Reporting Obligations: Some countries mandate reporting of large quantities stored onsite to environmental and emergency agencies
