Ammonia Exposure
Burns and airway irritation from ammonia gas or liquid
Quick Facts
- Type: Toxic chemical exposure
- Common sources: Cleaners, refrigeration, fertilizer
- Telltale clue: Sharp, suffocating odor
- Seek urgent care: Trouble breathing, eye or skin burns
Overview
Ammonia is a colorless gas with a sharp, suffocating odor, and it is also widely used in liquid form. It is found in household cleaning products, industrial refrigeration systems, and agricultural fertilizers. Because ammonia is very water-loving, it reacts strongly with the moist surfaces of the eyes, nose, throat, and lungs, causing irritation and chemical burns.
Most everyday exposures from household cleaners cause only mild, temporary irritation. However, concentrated ammonia, such as anhydrous ammonia used in farming and refrigeration, can cause severe burns and life-threatening airway injury. Large exposures are a medical emergency.
Symptoms
Symptoms depend on the concentration and whether the gas, liquid, or vapor contacted the eyes, skin, or airways.
- Mild exposure: Watery, burning eyes, runny nose, sore throat, and coughing.
- Moderate to severe inhalation: Chest tightness, wheezing, severe shortness of breath, and swelling of the airway.
- Skin and eye contact: Burning pain, redness, blistering, and chemical burns; concentrated ammonia can cause serious eye injury and vision loss.
- Swallowing liquid ammonia: Severe burns of the mouth, throat, and stomach.
Severe airway swelling and lung injury can develop quickly and are dangerous.
Causes
Harm comes from breathing ammonia vapor or from direct contact of the gas or liquid with the eyes, skin, or airways. Common sources include:
- Household cleaners: Glass and surface cleaners containing ammonia.
- Mixing chemicals: Combining ammonia cleaners with bleach releases additional toxic gases.
- Refrigeration systems: Industrial cooling uses anhydrous ammonia, which can leak.
- Agriculture: Anhydrous ammonia fertilizer can cause severe burns if mishandled.
Concentrated, water-free (anhydrous) ammonia is far more dangerous than dilute household products.
Risk Factors
- Working in agriculture, refrigeration, or chemical manufacturing
- Mixing ammonia-based cleaners with bleach or other products
- Using cleaners in poorly ventilated spaces
- Pre-existing asthma or lung disease
- Being a child or older adult, who may be more sensitive to irritants
Diagnosis
Diagnosis relies on the history of exposure and an examination of the affected areas. Tests are guided by severity:
- History and examination: Identifying the source and inspecting the eyes, skin, and airways.
- Eye assessment: Careful eye examination after any splash, since ammonia eye burns are serious.
- Oxygen and chest X-ray: To evaluate the lungs after significant inhalation.
- Airway evaluation: Direct examination of the throat and airway if swelling is suspected.
Treatment
Immediate decontamination is the priority, followed by supportive care.
- Fresh air: Move the person away from the source right away.
- Rinsing: Flush exposed eyes and skin with large amounts of water for at least 15 to 20 minutes; eye exposure needs prolonged irrigation.
- Remove contaminated clothing: To stop ongoing chemical contact.
- Oxygen and breathing support: For shortness of breath or airway swelling, which may require hospital care.
- Burn and wound care: For chemical burns of the skin or eyes, often with specialist input.
Do not try to neutralize ammonia with other chemicals; rinsing with water is the safe approach.
Prevention
- Never mix ammonia-containing cleaners with bleach or other products
- Use cleaners in well-ventilated areas and avoid breathing the fumes
- Wear eye protection and gloves when handling concentrated ammonia
- Follow workplace safety procedures around refrigeration and fertilizer systems
- Store ammonia products in labeled containers away from children
When to See a Doctor
Call emergency services for severe shortness of breath, choking, swelling of the throat, collapse, or a serious chemical burn, especially after exposure to concentrated ammonia. Begin rinsing the eyes or skin with water while waiting for help.
Seek prompt care if you have:
- Any ammonia splash to the eye
- Persistent coughing, wheezing, or chest tightness
- Burns or blistering of the skin
- Worsening breathing in the hours after exposure
Frequently Asked Questions
How dangerous is household ammonia cleaner?
Diluted household ammonia usually causes only mild, short-lived irritation of the eyes, nose, and throat with good ventilation. The serious danger is from concentrated, water-free ammonia used in farming and refrigeration, or from mixing ammonia cleaners with bleach, which releases toxic gas.
What should I do if ammonia splashes in my eye?
Rinse the eye immediately with large amounts of clean water for at least 15 to 20 minutes and seek medical care right away. Ammonia penetrates eye tissue quickly and can cause serious injury, so prompt and prolonged rinsing is important.
Can I mix ammonia and bleach to clean better?
No. Mixing ammonia with bleach releases toxic gases that can severely irritate the lungs. Never combine these products, and always use cleaners one at a time in a well-ventilated space.
How soon should I worry about breathing problems after exposure?
Breathing problems can begin within minutes, but serious lung effects sometimes develop over several hours. If you have ongoing cough, wheezing, chest tightness, or worsening breathing, seek medical care even if you felt fine at first.
Is anhydrous ammonia more dangerous than household ammonia?
Yes. Anhydrous (water-free) ammonia used in agriculture and refrigeration is highly concentrated and can cause severe burns and life-threatening airway injury almost instantly. It requires strict safety precautions and protective equipment.
References
- Agency for Toxic Substances and Disease Registry (ATSDR). Ammonia.
- Centers for Disease Control and Prevention (CDC). Facts About Ammonia.
- MedlinePlus, U.S. National Library of Medicine. Ammonia poisoning.
- Occupational Safety and Health Administration (OSHA). Ammonia.