June 28, 2013 | Earlier this week, we discussed the different hazard class divisions for common Fourth of July celebratory fireworks. Here is a look at the grouping of the hazard classes according to their compatibility:
"A" – Primary explosive substance
"B" – Articles containing a primary explosive substance and not containing two or more effective protective features; some articles, such as detonators for blasting, detonator assembled for blasting and primers, and cap-type are included