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Common name: Cyclotetramethylenetetranitramine (HMX), desensitized
Chemical formula: C4H8N8O8
Physical state: Typically found as a desensitized crystalline solid or in a moistened form to reduce explosive risk
Color: White, off-white, or pale yellow
Odor: Odorless
Other names: HMX, Octogen
Intended use: Ingredient in explosive formulations, propulsion systems, and research applications where high detonation performance is called for. Cyclotetramethylenetetranitramine gets used in explosive mixtures, which brings an obligation for careful safety measures in every step.
Main hazard: Explosive potential even in desensitized form
Acute effects: Eye, skin, and respiratory tract irritation
Chronic exposure: May cause liver and blood disturbances over continued contact
Routes of exposure: Inhalation, skin contact, ingestion
Symptoms: Headache, dizziness, nausea, skin redness, cough
Sensitivity: Impact, friction, and static discharge still pose risk; desensitization lowers but does not erase this danger
Environmental hazard: Non-negligible risk to aquatic life if spilled or disposed of improperly, given toxicity profile.
Main ingredient: Cyclotetramethylenetetranitramine (HMX) – usually 80% to 99% by weight
Desensitizing agents: Water (commonly 10–20% for moistened grade), various phlegmatizers (waxes, polymers) in specialized forms; exact type and amount influence sensitivity
No significant impurities commonly associated with off-the-shelf, well-produced HMX for industrial use
No known hazardous byproducts from simple storage if kept dry and cool.
Eye contact: Rinse with clean, lukewarm water for several minutes; seek medical advice if irritation persists
Skin contact: Remove contaminated clothing, wash contact area with soap and water
Inhalation: Move to fresh air promptly, support breathing as needed, consult a doctor if symptoms develop
Ingestion: Rinse mouth, do not induce vomiting, obtain medical help immediately
General remarks: Medical professionals should be alerted to the nitro compound exposure, given possible blood and organ concerns; do not delay professional intervention in serious cases.
Suitable extinguishing media: Water spray (fog), dry chemical powder may work for small fires
Non-suitable: Never use high-pressure water streams or attempt to move burning material
Hazards during fire: Risk of detonation or violent decomposition under intense heat
Decomposition products: Oxides of nitrogen, carbon monoxide, various toxic fumes
Protective gear: Self-contained breathing apparatus, full protective gear recommended for responders
Isolation: Evacuate area, keep nonessential personnel away; fire fighters face personal risk if the material explodes.
Personal precautions: Wear gloves, goggles, dust mask or respirator, antistatic clothing
Environmental precautions: Prevent entry into drains and surface or groundwater
Cleanup methods: Avoid friction, impact, or use of metal tools; scoop gently with plastic implements if possible
Avoid dust generation; moisten any dry powder with water for collection
Waste collected should be stored in sealed, clearly labeled containers for professional disposal.
Handling: Maintain good ventilation; use spark-free and static-free tools, avoid rough handling or dropping
Keep away from sources of ignition, open flames, and heat
Always wear chemical-resistant gloves and eyewear
Strict procedures should be followed during transfer, mixing, or use
Storage: Store in tightly closed containers in cool, dry, well-ventilated areas
Segregate from incompatible substances—strong acids, bases, and combustibles
Regularly inspect for spills, leaks, or deterioration
Access restricted to trained personnel; signage should clearly mark hazard.
Engineering controls: Local exhaust ventilation reduces dust, fume, and vapor exposure
Personnel: Wear chemical splash goggles, nitrile or PVC gloves, flame-resistant clothing, and antistatic footwear
Respiratory protection: Certified respirator for dust and fumes, especially during handling of dry powder
Hygiene: Wash hands and exposed skin before eating, drinking, or leaving the work area
Remove and launder contaminated clothing before reuse; showers and eye wash stations in the facility improve safety outcomes
No established occupational exposure limits for HMX, but levels should always be kept as low as practical.
Appearance: White to off-white crystalline powder, no distinctive odor
Melting point: Decomposes above 276°C; does not melt cleanly
Boiling point: Not applicable (decomposes at high temperature)
Solubility: Practically insoluble in water, soluble in acetone and certain organic solvents
Vapor pressure: Negligible at room temperature
Molecular weight: 296.16 g/mol
Explosive sensitivity: Desensitization lowers accident risk, but handling requires constant respect for latent energy
Stability: Stable under recommended storage, deteriorates with exposure to heat, pressure, or incompatible chemicals.
Chemical stability: Maintains integrity under cool, dry storage
Thermal hazards: Decomposition and risk of explosion above 276°C
Reactivity: Strong oxidizer; reacts dangerously with fuels, reducing agents, and many metals
Avoid: Impact, friction, extended sunlight, contact with acids, strong bases, or incompatible chemicals
Hazardous decomposition: Nitrogen oxides, carbon monoxide, various dangerous gases upon fire or detonation
Inert when properly maintained, but mishandling or accidental mixing with traces of oil or organic materials can trigger hazardous events.
Acute toxicity: Low oral toxicity in small accidental doses, but ingestion, inhalation, or large skin exposures can lead to cyanosis, dizziness, or more severe health issues
Chronic effects: Prolonged or repeated contact may affect blood (methemoglobinemia risk), liver, and kidneys
Sensitization: Not a common skin sensitizer, but individuals may develop irritation
Mutagenicity, carcinogenicity, reproductive hazards: Not proven or clearly demonstrated in tested populations, yet the general lack of long-term studies for niche explosives means risks cannot be dismissed
Practical experience: Most worker health problems stem from inadequate ventilation, spills, or poor hygiene practices; personal caution cuts avoidable incidents.
Toxicity: Harmful to aquatic plants and invertebrates, possible risk in runoff or wastewater
Persistence and degradability: Degrades slowly in the environment, especially in soil or sediment
Bioaccumulation: Not known to accumulate in animal tissues or food chains in significant amounts, but persistence means trace contamination can linger
Large spills: Can poison water sources, disrupt biological processes in treatment plants, and persist long after visible material disappears
Minimizing risk: Collect and dispose of all residues competently, avoid washing into outdoor drains or waterways, and report serious incidents to relevant agencies without delay.
Waste material: Classified as hazardous; do not attempt home or casual disposal
Methods: Controlled incineration at specialized hazardous waste facilities; never landfill or pour down the drain
Containers: Triple-rinse, then dispose of in adherence with local hazardous waste regulations
Contact authorities: Engage certified hazardous waste contractors familiar with explosives and similar high-energy materials
Community safety: Secure all waste pending removal, prevent access to unauthorized individuals, and do not store for extended periods before professional pickup.
Regulation: Subject to strict controls under international, national, and regional laws
Classification: Usually as an explosive (UN 0226 for HMX, wet or phlegmatized, as per UN Recommendations on the Transport of Dangerous Goods)
Transport mode: Only moving by licensed, specialist carriers with trained hazardous materials staff
Packaging: Rugged, sealed, clearly labeled containers designed to withstand jostling and climate variation
Documentation: Accurate labeling, manifests, and hazard placards must accompany all shipments
Spillage, theft, fire, or accident in transit calls for immediate notification of authorities—attempts to hide incidents have led to disaster in historic cases.
Explosives categorization: Controlled substance in most jurisdictions, with licensing, storage, and handling tightly monitored by government departments
Occupational health: National workplace safety agencies (such as OSHA in the US, HSE in the UK) lay down guidelines covering everything from training to fire safety
Environmental law: Pollutant discharge and accidental release regulations reflect the risk of groundwater and food chain contamination
Reporting: Most countries require mandatory reporting of incidents, spills, or theft
Penalties: Severe for unauthorized possession, transport, or disposal, reflecting both environmental and security risks of energetic materials lying outside the law.
