爆炸性 is an abstract noun formed by the verb 爆炸 (explode) plus the suffix 性 (-ity / -ness), meaning 'explosiveness' or 'explosive nature'. It is used both literally — describing materials or situations that can explode — and figuratively, to describe news, events, or growth that is shocking, sensational, or extremely rapid. The figurative sense is common in media and business contexts, and you'll often hear it in phrases like 爆炸性新闻 (explosive/sensational news) or 爆炸性增长 (explosive growth).