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Product Name: Polyoxymethylene (POM), also called Acetal or Delrin
Chemical Name: Polyoxymethylene
Synonyms: Acetal resin, Polyacetal, Polyformaldehyde
Recommended Use: Engineering thermoplastic, industrial and consumer plastic parts
Manufacturer Contact: Company address, emergency phone number, email for SDS
CAS Number: 9002-81-7
Classification: Not considered hazardous under GHS for solid form; dust and fumes may be hazardous
Signal Word: None for solid; "Warning" for dust or fumes
Hazard Statements: Dust generated during processing may cause irritation; thermal decomposition releases hazardous gases
Pictograms: Exclamation mark (if dust or fume exposure)
Precautionary Statements: Avoid breathing dust or fumes; use in well-ventilated areas; prevent fire risk by avoiding ignition sources
Physical Hazards: Dust explosion risk if finely divided; static discharge
Health Hazards: Eye, nose, throat irritation from dust or fumes
Environmental Hazards: No acute aquatic toxicity in solid state; risks if pellets/particles enter environment
Chemical: Polyoxymethylene Homopolymer or Copolymer
Chemical Formula: (CH2O)n
POM Content: 98–100%
Common Additives: Stabilizers, antioxidants, pigments (if colored)
Impurities: Minute traces of residual monomers and formaldehyde
Restrictions: Exact composition may depend on grade and manufacturer
Inhalation: Move to fresh air; seek medical attention for symptoms of coughing, shortness of breath, or dizziness caused by inhaling dust or fumes
Skin Contact: Wash with soap and water; remove contaminated clothing if molten material contacts skin, do not peel off solidified plastic, get professional medical help
Eye Contact: Flush eyes with plenty of clean water for at least 15 minutes; lift eyelids to remove debris; get prompt medical attention for burning, redness, or pain
Ingestion: Rinse mouth; drink water; seek medical help if discomfort develops
Advice for Medical Personnel: Treat symptomatically based on exposure type
Suitable Extinguishing Media: Water spray, dry chemical, foam, carbon dioxide
Unsuitable Media: Direct water jet onto burning material not preferred as it may spread molten resin
Hazards from Combustion: Carbon monoxide, formaldehyde, and other toxic gases
Firefighting Instructions: Wear full protective gear including SCBA; fight fire from upwind position
Special Hazards: Dust explosions can occur if fine POM dust is airborne in confined spaces
Decomposition Products: Formaldehyde, formic acid, and trace organic compounds
Personal Precautions: Avoid generating dust; use personal protective equipment
Environmental Precautions: Prevent spilled pellets or powder from entering drains, waterways, or soil
Spill Cleanup: Use mechanical means (shovel, broom, vacuum with HEPA filter); sweep up to avoid slip hazard; store recovered material in labeled container
Waste Disposal: Dispose in line with local, state, and federal regulations
Reference to Other Sections: For protective clothing, see Exposure Controls and Personal Protection
Safe Handling Advice: Use local ventilation at points where dust or fumes generate; refrain from smoking, eating, or drinking during handling; ground equipment and containers to prevent static discharge
Minimize Risk: Avoid spills of pellets, as these create slip hazard;
Storage Requirements: Store in dry, cool, well-ventilated area away from heat, direct sunlight, ignition sources, or oxidizers
Storage Materials: Use containers/materials compatible with plastic resin
Incompatible Materials: Strong acids, oxidizing agents
Other Precautions: Prevent build-up of dust; keep away from sources of heat or fire; do not stack pallets above recommended height
Control Parameters: OSHA PEL for nuisance dust: 15 mg/m3 (total), 5 mg/m3 (respirable)
Engineering Controls: Adequate general and exhaust ventilation; explosion-proof electrical equipment where dust accumulates
Personal Protective Equipment: Safety goggles/glasses, gloves resistant to heat if molten; dust masks or NIOSH-approved respirator for dust or vapor exposure
Skin Protection: Long-sleeved shirts, long pants, closed-toe footwear
Respiratory Protection: Dust mask for dusty conditions; half or full-face respirator for thermal processing
Hygiene Measures: Wash hands after handling; remove and wash contaminated clothing before reuse
Appearance: White or colored granules, pellets, or powder
Odor: Odorless as solid; pungent, formaldehyde-like smell if overheated
Melting Point: 160–175°C (varies by grade)
Boiling Point: Not applicable
Density: 1.41–1.43 g/cm3
Solubility: Insoluble in water; soluble in some organic solvents at elevated temperatures
pH: Not applicable
Vapor Pressure: Not applicable
Flash Point: Above 300°C (decomposition begins)
Auto-ignition Temperature: 350–375°C
Explosion Properties: Dust poses an explosion risk under rare circumstances
Other Properties: High stiffness, high mechanical strength, good chemical resistance
Chemical Stability: Stable at room temperature under recommended storage conditions
Possibility of Hazardous Reactions: None under normal conditions; risk with strong acids or oxidants
Conditions to Avoid: Overheating, flame, hot surfaces, incompatible chemicals
Incompatible Materials: Strong acids (e.g., nitric, sulfuric), oxidizers, chlorine compounds
Hazardous Decomposition Products: Formaldehyde, carbon monoxide, formic acid, other organics
Polymerization: Not likely to occur
Acute Toxicity: Not toxic in solid form; inhalation of dust or decomposition gases may cause irritation or nausea
Skin Corrosion/Irritation: Low hazard for intact skin; burns possible from molten plastic
Serious Eye Damage/Irritation: Dust can irritate eyes; molten material may cause severe injury
Respiratory or Skin Sensitization: No data suggesting sensitization risk from solid
Carcinogenicity: No known cancer risk from solid POM; formaldehyde (off-gas when overheated) is considered a potential human carcinogen
Chronic Effects: Prolonged exposure to dust or decomposition products can aggravate pre-existing respiratory conditions
Other Effects: No significant effects reported for products in normal use
Ecotoxicity: Non-toxic to fish or aquatic organisms in solid, unmodified form
Persistence and Degradability: Not readily biodegradable; resistant to UV and environmental degradation
Bioaccumulative Potential: Not expected to bioaccumulate
Mobility in Soil: Insoluble material, will remain where deposited
Other Adverse Effects: Pellet pollution can cause physical harm to wildlife through ingestion; microplastics risk if broken down
Waste Disposal Methods: Send to licensed recycler or, if not feasible, to an approved landfill; incinerate only in facilities capable of handling plastic waste and air emissions
Environmental Precautions: Prevent uncontrolled discharge to the environment; avoid burning in open air
Packaging Disposal: Clean thoroughly before recycling or disposal; follow local waste regs
Do Not Dispose: Do not flush into surface water or municipal sewage
Regulatory Information: Follow all applicable waste management rules
UN Number: Not regulated as a dangerous good via road, rail, air, or sea
Proper Shipping Name: Polyoxymethylene; Acetal resin
Transport Hazard Class: Not classified as hazardous
Packing Group: Not applicable
Environmental Hazards: Not a marine pollutant
Special Precautions: Protect from physical damage, excessive heat, and moisture; secure loads to prevent spillage; prevent release of pellets into environment
TSCA Status: Listed
EU REACH: Registered under polymer exemption
SARA Title III Sections 302/304/311/312: Not subject to reporting
DSL/NDSL (Canada): Listed
OSHA Hazard Communication Standard: Not hazardous in solid form
Other Regulations: Comply with workplace and environmental rules regarding dust exposure and waste management; confirm compliance with any substance-specific rules for additives or pigments
West Ujimqin Banner, Xilingol League, Inner Mongolia, China
