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Clean Hydrogen Partnership

Explosion at a chlorine production plant

Event

Event ID
603
Quality
Description

An increase of power surge affected the electrolytic chlorine production unit resulting in an excess of H2 in cells, which ignited and exploded.

Event Initiating system
Classification of the physical effects
Hydrogen Release and Ignition
Nature of the consequences
Macro-region
North America
Country
United States
Date
Component involved
electrolytic cell
Failure mode
internal explosion
Initiating cause
malfunctioning (electrolyser, cross-over)
Root causes
Unknown
Date entry in HIAD
28/01/2026

Facility

Application
Chemical industry
Sub-application
chlorine production
Hydrogen supply chain stage
Process temperature range [C]
Above ambient temperature (50°C to 100°C)
Location type
Confined
Location
unknown
Operational condition
Description of the facility/unit/process/substances

Hydrogen in chlorine has a wide flammability range between approximately 5% and 95%. The reaction is highly exothermic and characterise by a low ignition energy.

Emergency & Consequences

Number of fatalities
0
Number of injured persons
0
Currency
US$
Property loss (onsite)
69.000

In-depth data

Release type
gas mixture
Involved substances (% vol)
H2,
Cl2
Release temperature [°C]
25
Probable IGNITION SOURCE
Explosion type

References

Sources categories
Zalosh
Reference & weblink

Table II - Industrial Incidetns of Appendix A of Zalosh and Short
COMPARATIVE ANALYSIS OF HYDROGEN FIRE AND EXPLOSION INCIDENTS
Quarterly Report No. 2 for Period December 1, 1977 - February 28, 1978
https://www.osti.gov/biblio/6566131
(accessed September 2020)