HMX
High Melting eXplosive
Key Specs
Detonation Velocity
9,100 m·s⁻¹ at high density — classed as a powerful secondary high explosive.
Synonyms
- HMX, Octogen, cyclotetramethylene-tetranitramine.
HMX
HMX is a white, opaque crystalline powder, free of visible impurities and moisture. HMX is used to produce detonating cords and shock tubes that remain thermally stable up to ~300 °C. It is also blended with other explosives and with plasticizers/phlegmatizers to make compositions such as FO-4.5, FP-3.5, OWC, Octol, and LX-14 for warhead main charges, ammunition, boosters, pyrotechnic devices, and oil-well charges. When combined with polymer binders, HMX forms PBX materials suitable for insensitive-munitions applications.
Chemical Properties
Velocity of Detonation: 9100 m/s
Density: 1,908 kg/m³
Detonation Pressure: 39 GPa
Heat of Explosion: 6,192 KJ/kg
Oxygen Balance: -21.5%
Sensitivity: 7.4 J
Friction Sensitivity: 120 N
Water Resistance: Pass
Handling and Safety Notes
Packaging: 25 ± 0.2 kg per cardboard box 380 x 375 x 335 mm
UN Number: 0226
Hazard Class: 1.1D
Compatability Group: D
Trained Personnel Only: Handling, transport, storage and use of HMX must be performed exclusively by qualified, authorized explosives professionals following company procedures and applicable law.
Avoid Shock, Impact & Heat: HMX is a high explosive — avoid strong shock, impact, friction and proximity to heat sources or open flames; rough handling increases risk.
Do Not Attempt Improvised Initiation: Detonation requires approved initiation systems and must only be performed by trained technicians. Never attempt to ignite or initiate by flame, spark, or improvised means.
Storage Conditions: Store in a cool, dry, well-ventilated area, in original/approved packaging, away from incompatible materials (strong oxidizers, acids, etc.), ignition sources and direct sunlight. Follow SDS and local regulations for segregation and limits.
Static Electricity & Electrostatically Sensitive Operations: Take precautions to minimize static buildup; conduct transfers and handling per approved, site-specific procedures and grounding/bonding protocols.
Packaging Integrity: Keep packaging sealed, intact and clearly labeled to prevent contamination and preserve stability. Inspect packaging regularly for damage.
Personal Protective Equipment (PPE): Use appropriate PPE required by your SDS and site rules (e.g., eye protection, gloves, protective clothing). PPE choices should be determined by risk assessment and safety officers.
Environmental Protection: Prevent release to soil, drains or waterways. Manage residues, cleaning fluids and waste as hazardous material and dispose through licensed hazardous-waste contractors in accordance with regulations.
Emergency Preparedness: Maintain site emergency plans, trained responders and appropriate firefighting/containment resources. In case of suspected contamination, damage, fire or release, evacuate non-essential personnel and notify emergency services and safety officers immediately.
Documentation & Compliance: Always consult and keep accessible the SDS, transport documentation and required licenses/permits. Comply with DOT, ATF/other national regulations, export controls and local law.
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Inspection & Lifecycle Management: Perform routine inspections, inventory control, and follow manufacturer/SDS guidance for shelf life, storage limits and disposal. Retire or return material per authorized procedures.
Composition
HMX 98%
RDX 2%