Safety in a chemical laboratory is essential for anyone who works with chemicals and laboratory equipment. Compliance with health and safety rules protects health, life and the working environment, as well as reduces the risk of accidents and contamination. In the laboratory, every element – from equipment to station organization – matters, so knowledge of mandatory procedures is the basis for responsible work.
In this article, we present the most important rules that ensure the safe use of chemicals, proper storage of hazardous substances in the laboratory and control over working conditions, including proper ventilation in the laboratory.
What personal protective equipment is required in a chemical laboratory?
In a chemical laboratory, proper protective equipment is essential to reduce the risk of contact with chemicals, fire, and other hazards. Always use personal protective equipment (PPE) to protect your body, eyes and hands from burns and chemicals. Basic equipment includes: a protective apron (cotton and always fastened), safety glasses or laboratory goggles that provide full eye protection and face protection, and protective gloves, matched to the type of substances used.
Don't forget towear full footwear to cover your toes and tie up your long hair – this protects you from contact with fire and chemicals. These measures are the first line of defense against burns and poisoning, in accordance with health and safety rules. If you work with dust, fumes or chemical aerosols, also use protective masks.
It is worth remembering:
- The protective apron protects the body from dirt and burns.
- Safety glasses / laboratory goggles provide full protection for your eyes and face.
- Choose protective gloves according to the type of substance.
- Full shoes and tied hair minimize the risk of accidents.
What should I not do when working with chemicals?
There are many risks involved in working with chemicals, so follow strict safety rules. Any violation of the rules increases professional risks and can lead to serious accidents.
Never consume food or drink beverages in the laboratory – it is forbidden to eat, drink or chew gum. It is absolutely forbidden to pipette with your mouth – always use suction devices such as pumps or pears. Do not touch the reagents with your hands or check their taste to avoid poisoning or irritating the skin.
After you finish work and before leaving the laboratory, remember to wash your hands, which is a basic element of occupational hygiene and helps reduce the risk of accidents. Regular adherence to these rules also facilitates the correct risk assessment in subsequent experiments.
How to read warning pictograms and safety data sheets (SDS)?
Working with chemicals requires full awareness of the hazards. Before you start your experiment, read theinformation in the Safety Data Sheet (SDS) carefully – this is the main source of knowledge about the properties of substances, how to store reagents and NDS (Maximum Permitted Concentration) to control exposure to harmful chemicals. Compliance with REACH and CLP rules ensures that the data is up-to-date and reliable.
Pay particular attention to hazard pictograms, including CLP pictograms, which indicate the presence of hazardous substances such as carcinogens or mutagens. Each pictogram indicates the type of hazard – e.g. toxicity, corrosive or flammable – and helps you quickly identify risks when working with chemicals.
Also observe the markings in the SDS: the H phrases indicate the type of hazard, and the P phrases indicate the precautions and actions to be taken in the event of an accident. This allows you to handle substances safely and minimize occupational risks in the laboratory.
How to safely perform experiments and operate laboratory equipment?
Safety during experiments depends on the care and proper handling of the equipment. Before you start, make sure you knowthe rules of the laboratory and know how to safely handle chemical reagents and laboratory equipment.
Always follow the rules of acid dilution, for example: "Remember, young chemist, always pour acid into the water" to avoid a violent reaction. Inspect each laboratory glassware before use to rule out cracks that could cause an accident.
When testing the smell of a substance, use the palm fanning technique instead of sniffing directly from the dish. When working with a gas burner and heating substances , always point the outlet of the tube in a safe direction, away from yourself and others.
When using volatile or toxic substances, use a fume hood or a laboratory extractor to limit contact with fumes. Also remember to be careful when working with acids and hydroxides, as well as other chemical reagents that can be dangerous to the skin or respiratory tract.
How to properly dispose of chemical waste?
Working safely in the laboratory also includes proper waste disposal to protect yourself and the environment. Never pour chemical waste into the sink – this can cause contamination and chemical reactions with dangerous consequences.
Segregate waste into specially marked containers: separate containers for solvents, metal salts and other groups of substances. All sorbents used in the absorption of chemicals should be treated as hazardous waste.
Remember that toxic substances and corrosive substances require special attention when storing and handing them over for disposal. Store them in the right places, such as in chemical cupboards, before they go into the right containers.
How to behave during a fire or a leak of a dangerous substance?
In the lab, always be prepared for emergencies. Knowledge of equipment and procedures is essential for the safety of all people and to limit damage.
During a fire, followfire safety rules (fire safety). Use available extinguishing agents, such as a fire extinguisher ora fire blanket, remembering that live appliances must not be extinguished with water. Always stay calm and follow established emergency procedures.
In the event of a chemical leak, use suitable sorbents and, if possible, neutralize the reactive agents. Remember to limit the spread of chemicals, and if necessary, perform appropriate decontamination of the site.
Always know the escape routes and the location of the lab exits. Use extreme caution when working with flammable substances, explosives, oxidizing substances, and reactive substances. Store them in suitable places, such as fireproof cabinets, to reduce the risk of fire.
How to provide first aid for burns and poisoning in the laboratory?
In the lab, every moment counts, so react immediately to any accidents. Report the incident to the instructor and proceed with first aid in accordance with safety rules.
In case of chemical contamination, use an eye washer to rinse your eyes or a safety shower to rinse your skin. For acid burns , rinse the area with plenty of cold water to minimize chemical effects. Thermal burns should also be cooled with water and protected against further injury.
If you have come into contact with irritants, poisonous gases or toxic vapours, ensure that your respiratory tract is properly protected and remove the victim from the danger zone. Use the available first aid kit and, if necessary, apply chemical neutralization procedures in a safe manner.
To sum up, safe work in the laboratory is a combination of prudence, knowledge of the rules and appropriate equipment. Remember to use personal protective equipment, properly operate equipment and segregate chemical waste.
Also, check how laboratory ventilation works - requirements, types and safety rules to make sure that the air in the laboratory is clean and safe. Even small habits such as checking reagent labels or protecting the respiratory tract significantly reduce the risk of accidents and make everyday work easier.
March 24, 2026