alert
attention
beware
biohazard
blue
bones
brick
bright
caution
chemical
chemistry
color
colorful
danger
dangerous
death
glowing
hazard
hazardous
icon
illustration
isolated
lab
label
light
neon
pictogram
poison
protection
radioactive
risk
safety
security
sign
skeleton
skull
sticker
stop
substance
symbol
toxic
triangle
virus
wall
warning
zone
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