Fire extinguisher does not need to be Ex certified because it is intended to be used after an explosion to extuinguish fire.
What happens if this initializes another explosion while using it? May this ever happen?
Keep up good work!
Arpad
competenceability to apply knowledge and skills to achieve intended results Ex competent
One manufacturer and one client’s comm I have been involved in… Written
Yes. Source: gestis Keep up good work! Arpad exprofessional.com veress@exprofessional.com
The flammability range of hydrogen-air mixture is stated to be from 4 % (LEL)
arpadveress 
