HMX —Cyclotetramethylene Tetranitramine

Tetranitramine
Highest-velocity military explosive for shock tube and oil-well 
perforating charges
Chemical formula
Grades (HMX content)
RDX content
C₄H₈N₈O₈
Crystal type / appearance β-type  ·  white crystal
Special ≥ 99.5%  ·  A ≥ 99.0%  ·  B ≥ 
98.0%  ·  C ≥ 93.0%
≤ 0.3% (Special)  ·  ≤ 1.0% (A)  ·  ≤ 2.0% 
(B)  ·  ≤ 7.0% (C)
Melting point (capillary) ≥ 273 °C (Special / A)  ·  ≥ 271 °C (B)  ·  ≥ 
268 °C (C)
Acetone / inorganic 
insolubles
≤ 0.05%  ·  ≤ 0.03%