The chemicals mentioned are not inflammable. But may be explosve in uncontrolled process run by Novices. If the rate of production goes dangerously it acts like a Bomb.
If you track the history of the such explosions in various factories in the Boisar MIDC, you will realise that there is almost one every month. The safety officer are surely not doing their work and many incidents dont event get reported.
I hope this time we see some strict action and not some shoddy probe.