explosion
alcohol
bacteria
bacterium
beaker
biology
burner
caution
chemical
chemistry
danger
disease
dish
energy
equipment
experiment
fire
flame
flask
germs
glass
glassware
green
grey
hazard
icon
illustration
isolated
laboratory
medical
medicine
microbe
microbiology
nuclear
pollution
power
radiation
radioactivity
research
safety
science
set
toxic
tube
virus
white
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