Green Job Hazards

Lapse in Appropriations

For workplace safety and health, please call 800-321-6742; for mine safety and health, please call 800-746-1553; for Job Corps, please call 800-733-5627 and for Wage and Hour, please call 866-487-9243 (866-4-US-WAGE).  This website is currently not being updated due to the suspension of Federal government services. The last update to the site was 10/1/2025.  Updates to the site will start again when the Federal government resumes operations.

Hydrogen Fuel Cells: Freeze Burns

Workers may also be exposed to freeze burns when liquid hydrogen comes into contact with the skin. Hydrogen in the liquid form can be very cold -- hydrogen becomes a liquid below -423°F. To protect workers from the freeze burn hazards, the containers should be double-walled and vacuum-jacketed, and should designed to vent hydrogen safely in gaseous form if either the outer or inner wall experiences a leak.