Oxalic acid toxicity

Background

  • Used in bleach and rust removers
  • Also found in some species of plants

Mechanism of Toxicity

  • Solution form:
    • Irritative and Corrosive
    • Causes hypocalcemia and formation of calcium oxalate crystals that can deposit in brain, heart, and kidneys.
  • Insoluble form:
    • Local mucous membrane irritation

Toxic Dose

  • 5-15 g can be lethal

Clinical Features

Differential Diagnosis

Evaluation

  • Clinical
  • No specific levels for oxalic acid

Management

Disposition

References

  • Olson, K. Poisoning and Drug Overdose, 1999.