Educational summary of documented chemical interactions. Do NOT attempt any of these mixtures. If an accidental mix occurs, evacuate, ventilate, and call emergency services. Terms of use.

Chemical mixture

Can you mix Hydrogen peroxide and Hydrochloric acid?

!Caution required. Slow release of chlorine at high concentrations.
oxidizer
Hydrogen peroxide
CAS 7722-84-1
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acid
Hydrochloric acid
CAS 7647-01-0
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What happens

Concentrated peroxide oxidizes chloride to chlorine. Dilute household solutions are essentially inert but concentrated technical grade should be kept apart.

Reaction products

  • Chlorine (Cl2)
  • Water

If contact happens

Handle concentrated (>30 percent) peroxide in a fume hood, away from chloride sources.

Other common mixtures

See all 35 mixtures →

Educational summary based on public NIOSH, OSHA and CAMEO Chemicals data. Always consult the official Safety Data Sheet before handling.