Azure, a quatrefoil saltirewise Or bearing a quatrefoil of the first charged with a dragon of the second, armed and langued Gules grasping in its dexter paw a hatchet Yellow.
That for the regiments and separate battalions of the Illinois Army National Guard: From a wreath Or and Azure, upon a grassy field the blockhouse of old Fort Dearborn Proper.
PRIDE INTEGRITY COURAGE.
Cobalt blue and golden yellow are the colors traditionally associated with the Chemical Corps. The two quatrefoils allude to the unit's designation. The dragon, symbolically a staunch defender, epitomizes the unit's motto, "PRIDE, INTEGRITY, COURAGE," and has been used historically to identify chemical operations.
The crest is that of the Illinois Army National Guard.
The coat of arms was approved on 7 January 1997.