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41
Other medical treatment: symptomatic treatment and support therapy when indicated. Do not administer
adrenaline or sympatheticomimetic drugs after exposure, due to the risk of arrhythmia and possible cardiac
arrest.
4) Environmental data
Persistence and degradation
• HFC 143a: slow decomposition in lower atmosphere (troposphere). Duration in atmosphere is 55 years.
• HFC 125: slow decomposition in lower atmosphere (troposphere). Duration in atmosphere is 40 years.
• HFC 134a: relatively rapid decomposition in lower atmosphere (troposphere). Duration in atmosphere is
15.6 years.
• HFC 143a, 125, 134a: does not affect photochemical smog (not included in volatile organic components
– VOC – as established in the UNECE agreement). Does not cause ozone rarefaction.
Product exhausts released in the atmosphere do not cause long-term water contamination.