About ERT guide
Listing of various chemicals ( gas, solid, liquid), on exposure their effects on humans ( headache, coughing etc ) and exposure limits (PEL,STEL,IDLH)* , good for emergency response team responders or people working with chemicals so that you know encountered some of the symptoms, you may have been exposed to the chemical unknowingly.
*
PEL - permissible exposure limit
STEL - short term exposure limit
IDLH - immediately dangerous to life or health
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