Chemical burn: the right things to do in the first few minutes

May 12, 2026 at 9:00 am

A chemical burn can occur in a matter of seconds: a bottle of cleaner splashing, battery acid spilling, a cleaning product mishandled. Unlike a thermal burn, the product continues to act on tissues as long as it remains in contact with the skin or eyes. This is why first aid for a chemical burn is primarily based on the speed and duration of rinsing. In the minutes following the accident, your actions make all the difference.

Chemical vs. Thermal Burn: Why the Difference Matters

A thermal burn results from contact with a heat source — boiling water, steam, flame. A chemical burn, on the other hand, is caused by a corrosive agent that reacts with biological tissues: acid (battery acid, hydrochloric acid), base (caustic soda, concentrated bleach, ammonia), household cleaning products, pesticides, or agricultural products.

The fundamental difference: heat stops acting as soon as the source is removed. A chemical product, however, continues to penetrate the layers of the skin until it is completely eliminated. For this reason, rinsing a chemical burn must last 30 minutes — 10 minutes longer than for a thermal burn — as recommended by Montreal Public Health.

Identifying the type of burn also guides emergency calls: the Poison Control Center needs to know the product involved to guide you precisely.

The 5 Immediate Actions to Take

Every second counts. Here are the steps to follow in order, as defined by Montreal Public Health and the Canadian Centre for Occupational Health and Safety (CCOHS):

Secure the area and protect yourself. Before intervening, make sure you do not contaminate yourself. Wear gloves if you have them on hand, and avoid any direct contact with clothing or skin exposed to the product.
Remove contaminated clothing and jewelry. Gently remove all clothing, shoes, and jewelry touched by the product, without tearing them if they adhere to the skin. Textile fibers trap the chemical product against the skin and worsen the burn.
If the product is a powder: brush off dry first. Before any rinsing, eliminate solid residues with a gloved hand or a piece of clean cloth. Adding water to a chemical powder can trigger an additional reaction.
Rinse thoroughly with lukewarm water for 30 minutes. Use lukewarm water — neither cold nor hot. Rinsing must be continuous and abundant. Thirty minutes is a long time, but it is the necessary time to dilute and thoroughly eliminate the corrosive product. Do not shorten this step.
Cover with a dry, non-adherent dressing. After rinsing, gently cover the burned area with a dry, non-adherent dressing. Avoid any sticky dressing that could adhere to damaged tissues.

Throughout the rinsing — and ideally before interrupting it if the product is unknown — call the Quebec Poison Control Center at 1-800-463-5060. This service is available 24 hours a day, 7 days a week.

Special Case: Eye Burns

A chemical splash in the eyes constitutes an ophthalmic emergency. The eyeball is extremely vulnerable to corrosive agents, and every second without rinsing can compromise vision.

Here are the immediate actions to take:

Rinse the eyes immediately and thoroughly with lukewarm water or saline solution.
Forcefully keep the eyelids open throughout the rinsing — it's uncomfortable, but essential for the water to reach the entire surface of the eye.
If the person wears contact lenses, do not delay rinsing to try to remove them: start rinsing immediately.
Rinse for at least 15 to 20 minutes, according to CCOHS recommendations.
Call 911 without delay.

Do not wait to assess the apparent severity of the injury before calling for help: some products cause internal damage that is not immediately visible.

What Never to Do

Certain instinctive reflexes can, in the case of a chemical burn, seriously worsen the situation:

Never neutralize the product with its opposite. Pouring a base on an acid burn (or vice versa) causes an exothermic chemical reaction that generates heat and worsens the lesions. Rinsing with water remains the only appropriate action.
Do not rub the skin. Rubbing spreads the product, pushes it into deeper layers, and increases the affected area.
Do not apply ice. Ice causes vasoconstriction and can cause cold burns in addition to the chemical lesions already present.
Do not apply fatty substances, ointments, or disinfectants to the burn before receiving advice from a healthcare professional.
Do not pierce blisters that form: they protect tissues from infection.

Calling the Poison Control Center: When and Why

The Quebec Poison Control Center (1-800-463-5060) is more than just an information line: it is an emergency toxicology service available at all times, staffed by healthcare professionals trained to guide responders and victims in real-time.

Call the Poison Control Center:

During rinsing, if you do not know the product involved — they can tell you if a longer duration is needed or if additional precautions are necessary.
Before interrupting rinsing for a severe burn or one caused by an unknown product.
As soon as a child is involved, regardless of the apparent severity.
In all cases of doubt about what to do.

Always keep the product's safety data sheet (or at least its name and manufacturer) on hand to transmit to emergency services or the Poison Control Center. This information significantly speeds up risk assessment and treatment recommendations.

If the person is unconscious, convulsing, or has breathing difficulties, call 911 first.

In the Workplace: Prevention and Preparation

Chemical burns are particularly common in professional environments where corrosive products are handled: laboratories, factories, industrial cleaning workshops, agriculture. Prevention is both a legal responsibility and a moral obligation.

Some concrete measures to implement:

Install safety showers and eyewash stations that comply with standards, accessible within 10 seconds from any exposed workstation.
Ensure that safety data sheets for all chemical products used are up-to-date and easily accessible.
Train all staff in first aid procedures in case of chemical contact.
Equip each risk area with an adapted first aid kit, including non-adherent dressings and protective gloves.

For personal protective equipment and safety equipment adapted to your environment, consult the SuperMedic safety equipment collection — designed for professionals and industrial settings.

Conclusion

When facing a chemical burn, every action counts, and every second lost worsens the injury. Remember the essentials: remove contaminated clothing, rinse thoroughly with lukewarm water for 30 minutes, and call the Quebec Poison Control Center at 1-800-463-5060. Never neutralize the product with another product, and never rub the skin.

Whether you are at home or in the workplace, being ready to intervene starts with having the right tools at hand. Discover our complete first aid kits and our non-adherent dressings to ensure you are well-equipped when it truly matters.

Disclaimer: This article is provided for educational purposes only. It does not replace the advice of a healthcare professional or certified first aid protocols. In case of emergency, dial 911 or call the Quebec Poison Control Center at 1-800-463-5060.

Written By : SuperMedic