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Substance Name: Methyl Cellulose
Chemical Formula: C6H7O2(OH)3-x(OCH3)x
Other Names: Cellulose, methyl ether
Appearance: White or off-white powder
Common Uses: Thickener in food, binder in pharmaceuticals, adhesion in building materials, and viscosity control in personal care items
Key Feature: Insoluble in cold water, but forms a gel when heated
Hazard Classification: No major hazards identified under standard conditions
Main Concerns: Dust may irritate eyes, skin, and respiratory tract on direct contact
Long-term Effects: Limited evidence of chronic health concerns; ingestion in large amounts may cause gastrointestinal upset
Combustibility: Can burn if exposed to fire or high heat sources
Precautionary Labels: Not considered toxic, but always best to practice caution, especially in closed or poorly ventilated spaces
Main Ingredient: Methyl cellulose polymer
Purity: Typically above 99% methyl ether substituted cellulose
Impurities: Trace sodium chloride, sodium glycolate, or unreacted cellulose
Additives: Rarely present in technical or pharmaceutical grades
Inhalation: Move to fresh air, rinse nose and mouth, provide water
Eye Contact: Rinse thoroughly with clean water, do not rub eyes, seek care for continued irritation
Skin Contact: Wash affected area with soap and water, remove contaminated clothing if needed
Ingestion: Rinse mouth, drink water, expect mild irritation at worst, seek help for large or accidental high-dose exposures
Medical Attention: Usually not required unless unusual symptoms develop
Suitable Extinguishing Agents: Water mist, dry chemical, CO2, foam
Special Hazards: Burning methyl cellulose releases carbon monoxide, carbon dioxide, small amounts of formaldehyde
Firefighter Protection: Standard protective equipment, including self-contained breathing apparatus for heavy smoke
Fire Characteristics: Material may smolder or flare under direct flame, but not explosive
Containment: Sweep up powder to avoid dust dispersal, avoid dry sweeping large spills in confined spaces
Clean-Up: Collect residue carefully, vacuum if possible to reduce airborne dust, dispose of clean-up waste in accordance with local guidelines
Personal Protection: Use gloves, eye protection, and a dust mask for larger or poorly ventilated spills
Environmental Impact: No specific environmental hazards from small releases; contain large spills to keep them out of drains due to viscosity in water
Handling Tips: Minimize dust during transfers, seal containers promptly after use, avoid direct contact with eyes and prolonged skin exposure
Storage Conditions: Store in a dry, cool place protected from moisture and direct sunlight, use airtight containers to prevent lumping or degradation
Incompatibilities: Strong oxidizers, highly acidic or basic conditions accelerate breakdown
Special Precautions: Keep away from ignition sources because fine dust can ignite in concentrated form
Engineering Controls: Use local exhaust ventilation for batch mixing or industrial handling
Respiratory Protection: Dust masks recommended in dusty environments
Eye Protection: Safety goggles or glasses during mixing or when powder is airborne
Skin Protection: Gloves for prolonged handling, especially on sensitive or compromised skin
Workplace Monitoring: Keep levels of airborne dust below recommended exposure limits set by occupational safety agencies
State: Fine white or off-white powder
Odor: Odorless
Melting/Decomposition Temperature: Begins to decompose above 200°C
Solubility: Forms a gel in hot water, swells in cold water
pH in Solution: 5.5 to 8.0 for standard grades
Density: Roughly 1.3 g/cm³
Viscosity: Strongly dependent on concentration and temperature in solution
Chemical Stability: Maintains structure under normal storage and usage
Conditions to Avoid: Moisture, excessive heat, open flame
Hazardous Reactions: Rare under regular conditions, but mixing with strong oxidizers can prompt oxidation
Thermal Decomposition: Generates carbon oxides, formaldehyde at high temperatures
Acute Toxicity: Extremely low toxicity
Inhalation: Dust may cause mechanical irritation, coughing or sneezing
Eye/Skin Contact: Redness or itch with direct, undiluted contact
Ingestion: Large quantities may lead to bloating or digestive discomfort
Chronic Effects: No evidence links methyl cellulose to chronic illness in humans
Environmental Fate: Biodegradable, typically breaks down under natural conditions
Aquatic Toxicity: Low toxicity to fish and aquatic organisms
Persistence: Does not persist or accumulate in soil or water under routine conditions
Bioaccumulation: No potential for bioaccumulation due to molecular size and water solubility
General Guidance: Collect waste and dispose in accordance with local, regional, or national regulations
Incineration: Safe for municipal or industrial incineration
Landfill: Acceptable if permitted by local authorities, as material is non-hazardous
Recycling: Not typically recycled due to changes after use, but clean powder may be repurposed for non-critical applications
UN Number: Not regulated
Packing Group: Not applicable
Hazard Class: Not listed as a transport hazard according to most regulations
Transport Conditions: Protect from moisture and rough handling to avoid ruptured containers and spilled dust
Special Precautions: Shield from ignition sources during loading and unloading in bulk transit
Global Inventories: Included in major chemical inventories such as the US TSCA, EU REACH, Canadian DSL, Japanese ENCS
Occupational Exposure Limits: Referenced as a nuisance dust, usually under 10 mg/m³ for total dust in workplace air
Labeling: Not classified as hazardous under most global standards
Employer Responsibilities: Ensure workplace safety through access to data, good transfer practices, and awareness of hygiene procedures
