10 laboratory safety precautions protect every technician on shift. Wear your full PPE. Dress for the hazard. Read the SDS before you open anything. Keep food and cosmetics out of the lab.
Label every container. Never pipette by mouth. Use the fume hood and the safety cabinet properly. Separate your waste streams. Clean as you go. And know exactly what to do in an emergency.
Each one maps to a specific OSHA standard.
Lab safety is not a checkbox on a compliance list. Lab safety is not a checkbox on a compliance list. It is a daily discipline that every technician builds into how they work.
Most lab accidents do not happen because people lack training.
They happen because someone took a shortcut. Or skipped a step they had done a thousand times before. Or assumed it was fine, because it always had been.
When safety slips, the cost is never small. It lands on your people, your samples, your data, and your accreditation.
This guide covers the safety precautions in a laboratory that every clinical technician needs. Habits you build into a normal shift. Each one comes with the OSHA standard behind it, so you know where the requirement comes from.
1. PPE is non-negotiable
Personal Protective Equipment (PPE) is your first line of defense. It prevents injuries. It slows the spread of infection. And it stands between you and any chemical or biological exposure.
The precaution: Wear your full PPE kit whenever you are in a lab zone. That means:
- Certified safety goggles
- A lab coat, fully fastened
- Gloves matched to what you are handling
Why it matters: Your skin and eyes are the most vulnerable parts of your body in a lab. They take the brunt of the three most common hazards: splashes, spills, and aerosols.
Gloves prevent direct skin contact. Lab coats stop contamination from moving to your clothing. Goggles are the eye protection standard in every lab zone, shielding you from substances that cause irreversible damage in seconds.
Some chemicals destroy tissue silently, with no immediate symptoms to warn you. Under OSHA’s PPE standard (29 CFR 1910.132), your employer must assess workplace hazards and provide the right protection. The assessment only works if you wear the equipment.
Read also: Optimize your PPE Uses
2. Dress for the hazard, head to toe
What you wear under your lab coat matters as much as the coat itself.
The precaution:
- Wear full-length pants. No shorts, and no skirts above the knee.
- Wear closed-toe shoes that cover your feet completely.
- Tie long hair back and secure it.
- Remove rings, bracelets, and dangling jewelry before your shift.
- Roll up or fasten loose sleeves.
Why it matters: Spills reach the floor. So does broken glass. Full-length clothing and closed-toe shoes are the only barrier between your skin and whatever lands there.
Loose fabric, untied hair, and hanging jewelry create a different problem. They catch fire. They conduct heat. They snag in moving equipment.
OSHA requires your employer to assess these hazards under 29 CFR 1910.132, but the assessment only protects you if you dress for the hazard before you walk in.
Precautions 1 and 2 are the foundation, because they speak about personal protection – the first line of defence. These are entirely under your control. You choose what to wear, whether to fasten it, and whether to do it every single day.
3. Know your chemicals – master the SDS
Never use a chemical without reading its Safety Data Sheet (SDS). The precaution: Before opening any container, review the SDS for flammability, toxicity, reactivity, and any special storage or handling requirements.
Why it matters: Chemicals do not behave the way assumptions suggest. Some ignite on contact with air. Some react violently with water. Some seem harmless and cause neurological damage over years.
OSHA’s Hazard Communication Standard (29 CFR 1910.1200) requires an SDS to be readily accessible for every hazardous chemical in the workplace, in a fixed 16-section format.
The SDS also specifies the storage conditions a chemical needs to stay stable. Poor storage lets substances degrade, evaporate, or break down into something more dangerous than what you bought.
“I didn’t know it reacted with water” is not a defense after an incident – the information was in Section 10 the whole time.
4. No food, drink, or cosmetics
A laboratory is not a place to eat, drink, apply makeup, chew gum, or handle contact lenses.
The precaution: Never eat, drink, chew gum, apply lip balm, or use cosmetics in any laboratory area.
Why it matters: Cross-contamination is invisible. Hands that look clean can carry traces of toxins, bacteria, or carcinogens, and those traces travel – hand to cup, cup to mouth, mouth to bloodstream.
This is explicit in OSHA’s Bloodborne Pathogens Standard, 29 CFR 1910.1030(d)(2)(ix), which prohibits eating and drinking in areas where there is a reasonable likelihood of occupational exposure.
Never store food or drink in a refrigerator, freezer, or cabinet that holds blood or other potentially infectious materials.
Wash your hands with soap and water every time you leave the bench. Do it after you remove your gloves, not instead of wearing them. Gloves fail in ways you cannot see, and a pinhole tear leaves no mark on your skin.
OSHA requires your employer to provide handwashing facilities under 29 CFR 1910.1030(d)(2)(iii), and requires you to wash immediately after removing gloves or any other PPE. Soap and water beat hand sanitizer here. Alcohol gel does not remove chemical residue or spores.
The lab is a controlled environment designed to protect you. Undermining that control with a coffee cup is a poor trade.
5. Label everything, always
Labeling is not paperwork. Labeling is communication with whoever uses the bench after you.
The precaution: Label every beaker, flask, and tube with contents, concentration, date, and your initials. Never leave an unidentified liquid on a bench.
Why it matters: A clear liquid on a bench could be water. It could also be hydrochloric acid. Nobody can tell by looking.
A label answers that question before anyone has to guess. It protects whoever uses the bench after you. It also protects emergency responders, who must treat every unknown container as the worst case.
Under 29 CFR 1910.1200(f), every workplace container of a hazardous chemical must display the product identifier and the matching hazard warnings.
Unlabeled containers are also a serious problem for emergency responders, who have to treat an unknown as the worst case. Labeling takes ten seconds. Not labeling can cost far more.
6. Safe pipetting technique
The precaution: Never pipette by mouth. Use mechanical or electronic pipetting devices, without exception.
Why it matters: Mouth pipetting was standard practice for decades, and the record of poisonings, infections, and hospitalizations is what ended it. One accidental inhalation introduces toxins directly into your lungs or bloodstream. OSHA prohibits it outright for any material covered by 29 CFR 1910.1030(d)(2)(xii).
Aspirating a toxic or infectious fluid may feel like a near miss in the moment. The consequences – infection, chemical burns to the mouth and airway, systemic toxicity – are not proportional to how minor it felt.
Precautions 3 through 6 are chemical and biological hygiene. They govern how you handle the materials that make the lab run. Not excess caution, just treating every container and every fluid as something that deserves attention.
7. Use engineering controls properly
Fume hoods and Biological Safety Cabinets are your primary defense against inhalation hazards.
The precaution: Work with volatile, toxic, or odorous chemicals in a fume hood. Work with infectious agents in a Biological Safety Cabinet. Confirm the sash is at the correct height and airflow is functioning before you begin.
Why it matters: The respiratory system is exceptionally vulnerable. Some vapors attack the lungs directly, some cross into the central nervous system, and some damage organs slowly with no early symptom. OSHA’s Laboratory Standard (29 CFR 1910.1450) requires that fume hoods and other protective equipment function properly, and that specific measures be taken to ensure adequate performance.
Controls only work when used correctly. Overloading a hood, using it as permanent chemical storage, or blocking the airflow path defeats it. Check the airflow indicator before each use rather than assuming.
8. Strict waste segregation
The precaution: Know the difference between general trash, biohazard waste, sharps containers, and chemical waste streams, halogenated versus non-halogenated. Never mix incompatible wastes.
Why it matters: Improper waste disposal is an environmental hazard. The wrong combination of wastes causes reactions, fires, and toxic gas. Improper disposal is an environmental hazard. It also results in penalties by OSHA and EPA RCRA regulations.
Sharps have their own requirements. Under 29 CFR 1910.1030(d)(4)(iii)(A), place them in containers that are closable, puncture-resistant, and leak-proof.
That requirement exists because one failure keeps happening. Someone puts a sharp in general waste. The next person handling that bag does not expect it.
Proper segregation protects not only lab staff but cleaners, waste handlers, and the environment downstream.
9. Clean as you go
Housekeeping is the most overlooked of the laboratory safety precautions and one of the most consequential.
The precaution: Keep workstations organized and clutter-free. Clean chemical spills immediately with the correct spill kit. Keep emergency exits, safety showers, eyewash stations, fire extinguishers, fire alarms, and the first aid kit accessible and unobstructed at all times.
Why it matters: Clutter costs you seconds, and seconds are what an emergency takes from you. A blocked eyewash station is useless at the moment you need it most.
OSHA requires you to keep workplaces clean, orderly, and sanitary, and to keep passageways clear.
Equipment and environment precautions 7 through 9 cover the lab space itself. Safety does not stop at personal behavior; it extends to how you use protective systems and manage what leaves the bench.
10. Know your emergency protocols
The precaution: Know the location and correct use of safety showers, eyewash stations, fire extinguishers, fire blankets, and spill kits. Memorize evacuation routes. Take part in drills.
Why it matters: When panic sets in, logic fades, fine motor skills weaken, and decision-making slows. Preparation builds the muscle memory you will fall back on. 29 CFR 1910.151(c) requires suitable facilities for quick drenching or flushing of the eyes and body within the work area, and 29 CFR 1910.38 requires a written emergency action plan with evacuation procedures and route assignments.
Precautions to take with exits in the laboratory
Emergency exits are where good intentions most often fail an inspection, so treat them as their own checklist:
- Keep every exit route unobstructed. no carts, no boxes, no equipment staged “temporarily” in an egress path.
- Never lock or block an exit door from the inside during working hours. Exit routes must be free of anything that could impede movement (29 CFR 1910.36).
- Know at least two routes out of every room you work in. The nearest exit may be the one on fire.
- Confirm exit signage is illuminated and visible from anywhere along the route.
- Keep exit doors free of decorations, notices, or anything that obscures their purpose.
- Do not route an exit path through a high-hazard area, past the flammables cabinet is not an escape route.
- Walk the route during drills, not just on the floor plan. People evacuate the way they have practiced.
Precaution 10, the Emergency Preparedness, accepts that incidents still happen. What separates a managed incident from a catastrophe is whether the response was rehearsed.
Lab safety is a mindset, not a checklist
These laboratory precautions and safety practices span personal protection, chemical handling, equipment discipline, waste management, housekeeping, and emergency response. Followed consistently, they stop being rules you remember and become the way work gets done.
A safe lab is also a productive one. Staff who feel protected work faster, and labs that document their safety and precautions in the laboratory clear CAP and CLIA inspections with far less friction.
Frequently asked questions
What are the 10 laboratory safety precautions?
Wear complete PPE, dress for the hazard, read the SDS before using any chemical, keep food and cosmetics out of lab areas, label every container, never mouth-pipette, use fume hoods and biological safety cabinets correctly, segregate waste streams, clean as you go, and know your emergency protocols. Each maps to a specific OSHA standard, and all ten should appear in your lab’s Chemical Hygiene Plan.
What is the most important safety precaution in a lab?
PPE, because it is the last barrier between you and an exposure and it is entirely within your control. That said, OSHA’s hierarchy of controls ranks engineering controls – fume hoods, biological safety cabinets – above PPE, because they remove the hazard rather than shielding you from it. The strongest answer is that PPE is the most important precaution you personally control, and engineering controls are the most effective ones your lab provides.
Which OSHA standard covers laboratory safety?
29 CFR 1910.1450, the Occupational Exposure to Hazardous Chemicals in Laboratories standard, is the primary one. It requires a written Chemical Hygiene Plan and a designated Chemical Hygiene Officer. Clinical labs handling human blood or body fluids are also covered by the Bloodborne Pathogens Standard, 29 CFR 1910.1030, and every lab is subject to Hazard Communication under 29 CFR 1910.1200.
What safety precautions apply to exits in the laboratory?
Exit routes must stay permanently unobstructed and unlocked from the inside during working hours. Know at least two routes out of every room, keep signage illuminated and unobscured, avoid routing egress past high-hazard areas such as flammables storage, and walk the route during drills rather than only reviewing it on a floor plan.
How often should lab safety training be conducted?
OSHA requires initial training before an employee begins work with hazardous chemicals, and additional training whenever a new hazard is introduced. Bloodborne pathogens training under 29 CFR 1910.1030 must be repeated at least annually. Most accredited labs run annual refreshers with competency assessment, which also satisfies CAP and CLIA personnel requirements.
What is the difference between a fume hood and a biological safety cabinet?
A chemical fume hood pulls air away from you and exhausts it outside, protecting the person but not the sample. A biological safety cabinet uses HEPA filtration to protect the operator, the sample, and the environment, and is what you use for infectious agents. They are not interchangeable – volatile chemicals in a BSC can damage the HEPA filter and release contamination.
Do these precautions satisfy CAP and CLIA requirements?
They cover the operational core, but CAP and CLIA also require documented evidence: a current Chemical Hygiene Plan, training records, competency assessments, incident logs, and equipment certification records. Following the precautions is the practice; documenting them is what an inspector actually reviews.
