Poisoning and Swallowed Chemicals
Why this matters
Every service van carries something that will hurt a person who swallows it: drain opener, pool acid, hypochlorite, glycol, solvent, pesticide concentrate. It almost never happens on purpose: a product got poured into a drink bottle and someone grabbed the wrong one. The first two minutes after that are decided by two phone numbers and one rule, and the most common mistake is a well-meant one: making the person throw up.
This card is about the swallowed route. Splashes to the eye and breathed fumes have their own cards, cited below. Nothing here replaces hands-on first-aid certification, which is what actually makes a responder; it is what to know so that the call you make is the right one.
Which number, and when
There are two calls, and the person's state picks between them.
- Call 911 first if the person is unconscious or hard to wake, is not breathing or is struggling to breathe, is having a seizure, or cannot swallow and is drooling (a sign the mouth and throat are burned). Those are emergency-services problems regardless of what was swallowed. Tell the dispatcher what the product is; they can conference in a poison center.
- Call Poison Control at 1-800-222-1222 if the person is awake, alert and breathing normally. In the United States that one number routes to the regional poison center for wherever the call comes from. It is free, it answers around the clock, and the person on the line is a nurse, pharmacist or physician trained in toxicology. They will tell you whether this is a stay-and-watch, a go-to-the-ER, or a call-911.
Do not wait for symptoms before calling. Several of the worst trade chemicals produce nothing for hours, and the specialist needs the time, the amount and the product while the details are fresh. If the person's condition changes at any point during or after the Poison Control call (drowsy, breathing harder, vomiting, confused), hang up and call 911.
Put the Poison Control number in every tech's phone and on the inside of every kit lid. A number that has to be searched for gets called late.
The rule, and the reasoning behind it
Do not induce vomiting. No fingers down the throat, no salt water, no syrup of ipecac. Ipecac used to sit in every first-aid kit; the American Academy of Pediatrics withdrew its home-use recommendation in 2003, and poison centers no longer advise it. The reasons are specific to what trades carry:
- Corrosives (lye-based drain opener, sulfuric-acid drain opener, muriatic acid, strong hypochlorite) burn on the way down. Bringing them back up burns the same tissue a second time.
- Hydrocarbons (gasoline, kerosene, mineral spirits, lamp oil, many solvents) are thin and slippery. The real danger is not the stomach but the lungs: a little inhaled during swallowing or vomiting causes a chemical pneumonia far more serious than the swallowed amount. Vomiting is exactly how it gets into the airway. Coughing, choking or gasping after a hydrocarbon swallow is a reason to call 911.
- Everything else gains almost nothing from vomiting, and it delays the treatment the hospital actually uses.
The other things not to do:
- Do not neutralize. Vinegar for a base or baking soda for an acid makes heat in the throat.
- Do not give anything by mouth (water, milk, a sports drink) unless the poison specialist tells you to. They sometimes do, for some corrosives in an alert person, and they will say how much. A drowsy person given a drink can choke.
- Do not let the person drive themselves anywhere. If they are sent to an ER and are alert, a coworker can drive them; if they are anything less than alert, 911 does the transport.
Do wipe or rinse what is on the outside. If the product spilled on the lips, chin or hands, wipe it off and rinse the skin with water, wearing gloves yourself. Pesticide concentrates and some solvents also absorb through skin, so take off soaked clothing. Have the person spit out anything still in the mouth.
What to have in your hand when the call connects
The specialist will ask the same things every time, and the answers sit on the container. Pick it up before you dial, not after.
POISON CONTROL CALL CARD (inside kit lid)
1-800-222-1222 not alert / not breathing: 911
WHO age ___ approx weight ___ lb
WHAT product name off the label ____________
active ingredient / percent __________
(no label? say so, and say what it was
last used for)
HOW MUCH sip / mouthful / more swallowed or spat
WHEN time of swallow ____ time of call ____
NOW awake? breathing? coughing? vomited?
burns at mouth? drooling?
WHERE job address, in case they send 911
Bring the CONTAINER and the SDS with the person.
Do not induce vomiting.
The Safety Data Sheet (SDS) is the manufacturer's 16-section hazard document that OSHA's Hazard Communication Standard, 29 CFR 1910.1200, requires for every hazardous chemical an employer has on hand. Section 1 carries the manufacturer's emergency phone number. Section 3 lists ingredients and concentrations, which is what the specialist actually needs. Section 4 is first-aid measures. The product label carries a shorter "IF SWALLOWED" precautionary statement that usually ends in "Do NOT induce vomiting" for exactly the products where it matters. If the shop keeps SDSs in an app or binder, practice pulling one up from a van in under a minute; a binder in the office is no help at a pool equipment pad.
The trade chemicals that change the call
| What was swallowed | Where it is in the van | What a responder sees | Why it changes the call |
|---|---|---|---|
| Lye or acid drain opener | Plumbing, handyman | Pain, drooling, trouble swallowing, burns in the mouth (sometimes none visible) | Throat injury can exist without mouth burns; specialist almost always wants evaluation |
| Muriatic acid, hypochlorite | Pool, cleaning, masonry | Same corrosive picture; coughing if fumes were breathed too | Often paired with an inhalation exposure; tell the specialist both |
| Ethylene glycol | Hydronic, chiller, auto | Often nothing at first; later looks drunk, then very sick | Delayed toxicity; hospital treatment works best given early, before symptoms |
| Methanol | Washer fluid, some solvents, fuel additives | Nothing at first; later headache, vision changes | Same delayed pattern as ethylene glycol |
| Gasoline, kerosene, mineral spirits | Generators, small engines, painting | Coughing, choking, gasping | Lung aspiration is the threat; coughing means 911 |
| Pesticide concentrate | Pest, lawn | Varies widely by product family | Label first-aid statement and its hotline matter; skin and clothing too |
Propylene glycol is the one worth separating. Many hydronic and potable-adjacent loops use it instead of ethylene glycol, and it is far less toxic. But a tech rarely knows which one is in a system someone else filled years ago, and the two look identical in a sample bottle. If the type is unknown, say "glycol, type unknown" and let the specialist treat it as the worse one. Guessing propylene to make the problem smaller is how a treatable poisoning goes untreated.
Why "I feel fine" is not the all-clear
The person who swallowed it will usually want to shake it off. They spat most of it out, it tasted bad, they feel normal, they have three more calls. For corrosives that may even be true. For ethylene glycol and methanol it is the trap: the body turns them into toxic acids over hours, and the window in which the hospital's antidote prevents kidney or vision damage is the window in which the person feels fine. A specialist who sends someone to the ER for a mouthful of an unknown glycol is not overreacting, and the shop's job is to get them there and keep them there until the clinicians release them.
The same is true of a hydrocarbon swallow where the person coughed afterward. Chemical pneumonia can build over several hours. Poison Control may tell you to watch the person and call back; when they do, someone stays with the person for the whole watch period they name. Do not send them back up a ladder alone.
Worked example: the sample in the door pocket
A hydronic tech, Dana, drains part of a boiler loop at a two-story house to replace a circulator and catches the fluid in a clear drink bottle so she can check freeze protection with a refractometer back at the van. Her apprentice, Luis, about 160 lb and 22 years old, has an identical bottle of water in the same door pocket. At 10:40 he takes a mouthful of the wrong one, notices a sweet taste, spits most of it out and swallows some.
10:41. Dana asks two questions: is he awake and breathing normally (yes), and is he coughing (no). That routes the call to Poison Control, not 911. She tells him to spit again and rinse and spit, and does not give him anything to drink.
10:42. She picks up the bottle and walks to the boiler. The system tag reads "inhibited glycol" with a fill date eight years old and no type. There is no jug on site. She photographs the tag.
10:43. She calls 1-800-222-1222 with the card. Who: 22, about 160 lb. What: boiler loop glycol, type unknown, tag photographed; her refractometer, read on its two scales, gives a concentration in the 30s either way, and she reports the reading and that she cannot tell which scale applies. How much: about one mouthful, most spat out, some swallowed. When: 10:40. Now: alert, no cough, no vomiting, no symptoms.
The specialist's call. Because the type is unknown and ethylene glycol cannot be excluded, Luis goes to the nearest emergency department now, not when symptoms start. He is alert, so Dana may drive him. She caps the sample bottle, bags it, and takes it, the tag photo and the refractometer reading with them.
12:50. Luis feels completely normal and wants to leave before labs come back. Dana, who has been told why the delay matters, calls the office and the owner tells Luis the shop wants him to stay until the doctor discharges him, and that the afternoon calls are being covered. That conversation is the shop's whole job in this case. The office also opens the injury report (see related: Accident and Incident Reporting SOP).
What would have changed the call. If the system's fill records had shown propylene glycol, and the amount was small, the specialist might have advised watching him at home with a callback. That is the poison center's decision to make with the facts in front of them, not the tech's to make in advance by assuming the milder chemical. If Luis had started coughing after the swallow, which suggests some went into his airway, or had become drowsy, the call would have been 911 from the driveway.
The failure this prevents. Without the card, Luis says he is fine, they finish the job, and nobody calls anyone. With ethylene glycol, the first sign arrives that evening when he is home alone.
Where swallowing actually starts
Almost every trade poisoning traces back to a decanted chemical. Never put a chemical, a sample or a dilution in a food or drink container, ever, including "just for today." Use a dedicated sample bottle or spray bottle that cannot be mistaken for a drink, and label it. OSHA's Hazard Communication Standard requires workplace containers of hazardous chemicals to be labeled, at 29 CFR 1910.1200(f), with a narrow exception for a portable container used immediately by the person who filled it, under the conditions the standard lists; a sample bottle riding in a door pocket for an afternoon is not that. A state-plan state may layer its own labeling rules on top. Keep drinks in a separate cooler or the cab, never in the same pocket or bin as samples, and make "no drinks in the chemical bay" a van rule, not a suggestion.
References
- American Association of Poison Control Centers: Poison Help line 1-800-222-1222 and guidance for workplace exposures
- OSHA, Hazard Communication Standard, 29 CFR 1910.1200 (SDS sections and container labeling)
- American Red Cross and American Heart Association first aid guidelines (poisoning, do not induce vomiting)
- See related: The First Five Minutes After Someone Is Hurt; Calling 911 From a Job Site So They Find You; How to Flush an Eye After a Chemical Splash; Inhalation Exposure First Response
- See related: First Aid + AED on the Jobsite