Polyhalogen compounds Flashcards
what are polyhalogen compounds
compounds containing more than one halogen atom.
dichloromethane in manufacturing industries
used as a paint remover, propellant in aerosols and is used in drugs
how does dichloromethane harm us
harms the CNS
low levels of dichloromethane can harm us in what way
impaired hearing and vision
high levels of dichloromethane can harm us in what way
dizziness, nausea and numbness in toes and fingers.
skin contact with dichloromethane
causes burns and mild redness of the skin and can burn the cornea.
trichloromethane(chloroform)
used in the projection of freon refrigerant R-22
chloroform in surgery and why is not used anymore
anaesthetic but depresses the CNS, destroys the liver and kidneys.
what happens when chloroform is oxidised
forms a poisonous gas called carbonyl chloride(phosgene)
triiodomethane but why is not used anymore
was used an antiseptic but due to its smell
carbon tetrachloride
used to manufacture refrigerants and propellants. forms CFCs
dangers of CCl4
liver cancer, permanent damage to nerve cells, coma, death.depletes the ozone layer
what are freons?
chlorofluorocarbon compounds of methane and ethane are collectively known as freons.
how are freons formed
from ccl4 by swarts reaction
dangers of freons
upsets natural ozone balance and is used in refrigeration, air conditioning and aerosol propellants.
