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  1. Home
  2. Health Library
  3. Poison
  4. Oxalic acid poisoning

Oxalic acid poisoning

Poison

Oxalic acid is a poisonous, colorless substance. This article discusses poisoning from swallowing oxalic acid.

This article is for information only. DO NOT use it to treat or manage an actual poison exposure. If you or someone you are with has an exposure, call your local emergency number (such as 911), or your local poison center can be reached directly by calling the national toll-free Poison Help hotline (1-800-222-1222) from anywhere in the United States.

Oxalic acid

Oxalic acid may be found in some:

  • Anti-rust products
  • Bleaches
  • Metal cleaners
  • Rhubarb leaves

Note: This list may not be all inclusive.

Symptoms

Symptoms of oxalic acid poisoning include:

  • Abdominal pain
  • Burns and blisters where the acid contacted the skin, lips, tongue, and gums
  • Collapse
  • Convulsions
  • Mouth pain
  • Shock
  • Throat pain
  • Tremors (unintentional trembling)
  • Vomiting

Home Care

Seek immediate medical help. DO NOT make a person throw up unless told to do so by Poison Control or a health care professional.

If the chemical was swallowed, immediately give the person water or milk, unless instructed otherwise by a health care provider. DO NOT give water or milk if the person is having symptoms (such as vomiting, convulsions, or a decreased level of alertness) that make it hard to swallow.

Before Calling Emergency

The following information is helpful for emergency assistance:

  • Person's age, weight, and condition
  • Name of the product (ingredients and strengths, if known)
  • Time it was swallowed
  • Amount swallowed

However, DO NOT delay calling for help if this information is not immediately available.

Poison Control

Your local poison center can be reached directly by calling the national toll-free Poison Help hotline (1-800-222-1222) from anywhere in the United States. This hotline number will let you talk to experts in poisoning. They will give you further instructions.

This is a free and confidential service. You should call if you have any questions about poisoning or poison prevention. It does NOT need to be an emergency. You can call for any reason, 24 hours a day, 7 days a week.

What to Expect at the Emergency Room

The health care provider will measure and monitor vital signs, including temperature, pulse, breathing rate, and blood pressure. The person may receive:

  • Activated charcoal
  • Airway support, including oxygen, breathing tube through the mouth (intubation), and breathing machine (ventilator)
  • Blood and urine tests
  • Camera down the throat (endoscopy) to see burns in the food pipe (esophagus) and stomach
  • Chest x-ray
  • EKG (electrocardiogram, or heart tracing)
  • Fluids through a vein (intravenous or IV)
  • Medicines to treat symptoms
  • Tube through the mouth into the stomach to aspirate remaining acid

Outlook (Prognosis)

How well a person does depends on the amount of poison swallowed, how concentrated the poison is, and how quickly treatment was received. The faster a person gets medical help, the better the chance for recovery.

Severe damage to the mouth, gastrointestinal tract, or airway may occur and quickly cause death if not treated. Holes (perforation) in the esophagus and stomach may cause serious infections in both the chest and abdominal cavities, which may result in death.

References

National Library of Medicine; Specialized Information Services; Toxicology Data Network. Oxalic cid. Toxnet.nlm.nih.gov Web site. toxnet.nlm.nih.gov/cgi-bin/sis/search2/r?dbs+hsdb:@term+@DOCNO+1100. Updated June 24, 2005. Accessed February 9, 2017.

Olson KR, Hung YM. Oxalic acid. In: Olson KR, ed. Poisoning and Drug Overdose. 6th ed. New York, NY: McGraw-Hill Lange; 2012:chap 121.

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Review Date: 1/31/2017

Reviewed By: Jacob L. Heller, MD, MHA, Emergency Medicine, Emeritus, Virginia Mason Medical Center, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

 
 
 

 

 

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