01 // Why lab rules exist
Lab safety rules exist because science labs use heat, glass, sharp tools, and chemicals that are safe when handled correctly and genuinely dangerous when they are not. Every lab file on this site notes its hazard level and lists the specific precautions for that activity, but a few rules apply to almost every lab.
Most classroom lab accidents are preventable: they come from skipping goggles, rushing a step, or not knowing where the safety equipment is before starting. Reading the full procedure before you start, not while you are mid-experiment, is one of the simplest ways to avoid a mistake.
02 // Common hazard symbols
| Symbol means | What it warns about | What to do |
|---|---|---|
| Corrosive | Can burn skin or eyes on contact | Wear goggles and gloves, avoid splashes |
| Flammable | Catches fire easily | Keep away from open flame or heat |
| Toxic | Harmful if swallowed, inhaled, or absorbed | Never taste-test; wash hands after |
| Irritant | Can cause redness or discomfort on contact | Avoid skin and eye contact; rinse if exposed |
| Biohazard | May contain organisms that can cause illness | Follow disposal instructions; no eating nearby |
03 // Ground rules for every lab
- Read the full procedure before you start, so you know every hazardous step in advance rather than discovering it mid-lab.
- Know where the eyewash station, fire extinguisher, and exit are before the lab begins, not after something happens.
- Tie back long hair and loose clothing near any open flame or moving equipment.
- Never eat, drink, or taste anything in a lab space, even something that looks like food.
- Report a spill, breakage, or injury to your teacher immediately — do not try to quietly clean it up and move on.
04 // Questions people ask
What should you do first if a chemical splashes in your eye?
Go straight to the eyewash station and rinse continuously for at least 15 minutes while telling your teacher what happened — do not wait to finish the step you were on first.
Are goggles required for every lab, even low-hazard ones?
Most school lab policies require goggles for any activity involving liquids, heat, or glassware, even a lab labeled low hazard, because splashes and breakage can happen in any of those.
Why can't you eat in a lab space even if the food is sealed?
Because a lab space can have invisible chemical residue on surfaces, and eating there creates a habit of hand-to-mouth contact that becomes dangerous the moment a real hazardous spill happens.