(The following is a reformatted version of a press release
issued by Dupont and received via electronic mail. The release
was confirmed by the sender.) 
Failure to Implement Mobile Air Conditioning Directive in Europe
Has Significant Costs in Emissions Reports DuPont 
Delaying Implementation can Result in Millions of Tons of
Additional Greenhouse Gas Emissions 
WILMINGTON, Del., March 12, 2013 - DuPont today expressed
disappointment in Daimler’s statement that it will postpone
compliance with Europe’s Mobile Air Conditioning (MAC) Directive
while it pursues a technology that reportedly will not be ready
to implement for many years. 
The MAC Directive, which is a central part of the European
Union’s sustainability program and went into force Jan. 1, 2013,
requires that automotive air conditioning systems in new model
vehicles sold in the European Union use a refrigerant with a
global warming potential (GWP) of less than 150.  Failure to
implement the MAC Directive immediately comes at a considerable
cost in terms of greenhouse gases introduced into the
environment.  For example, delaying the MAC Directive until the
start of 2015 would result in higher greenhouse gas emissions
equivalent to putting 400,000 additional cars on the road.* 
Automakers have had a number of years to identify a refrigerant
for use in complying with the MAC Directive.  Automakers from
around the world evaluated a range of refrigerants as candidates
for MAC Directive compliance, including HFO-1234yf and carbon
dioxide.  Among the available options, the consensus view was
that HFO-1234yf is the most suitable alternative when
considering performance, life-cycle climate performance, safety,
implementation costs and industry readiness. 
“Automakers conducted extensive testing, and concluded that HFO-1234yf is the best option overall,” said Thierry Vanlancker,
president, DuPont Chemicals & Fluoroproducts.  “This involved
extensive testing in real-life conditions, and evaluations
conducted at independent, third-party laboratories.  The results
consistently showed that the refrigerant is highly unlikely to
ignite and that ignition requires an extremely unlikely
combination of exceptional conditions that are not consistent
with real world collision scenarios.” 
All industry-sponsored risk assessments have determined that
HFO-1234yf can be used safely and that neither flammability nor
hydrogen fluoride formation present a significant safety
concern.  In fact, a presentation co-authored by Daimler and
presented in September 2012 in Germany, concluded that “R1234yf
equipped vehicles are as safe as those using R134a - for
occupants, mechanics, first emergency responders and fire
The automotive industry has established recommendations to
enable the safe use of HFO-1234yf.  DuPont is not aware of any
documented cases of actual vehicle crash tests where HFO-1234yf
ignited.  Further, another German car manufacturer was recently
quoted in a news report as saying that the results of their
testing of HFO-1234yf have been positive without exception. 
“Safety is a core value of DuPont and is central to everything
we do,” added Vanlancker.  “We certainly put safety as the first
priority and we have a high degree of confidence that HFO-1234yf
can be safely used as an automotive refrigerant.  We remain
committed to work with Daimler to overcome their current
technical concerns.” 
Using carbon dioxide as an automotive refrigerant reduces fuel
efficiency of vehicles and this becomes an overriding factor in
the warmer geographies of the world.  Further, use of carbon
dioxide as an automotive refrigerant involves the potential for
passengers to breathe unacceptable levels of carbon dioxide in
the event of a refrigerant leak. 
DuPont co-developed HFO-1234yf in response to Europe’s MAC
Directive, and the company markets and sells the refrigerant
under the name Opteon™ YF.  DuPont applies its scientific
expertise to creating sustainable solutions that make a
difference in the world and our commercialization of Opteon™ YF
is a great example of this.  Opteon™ YF is a scientific
breakthrough that has a 99.7 percent lower global warming
potential than the refrigerant it was developed to replace, and
has potential to reduce emissions equivalent to using billions
fewer liters of fuel every year. 
DuPont (NYSE: DD) has been bringing world-class science and
engineering to the global marketplace in the form of innovative
products, materials, and services since 1802.  The company
believes that by collaborating with customers, governments,
NGOs, and thought leaders we can help find solutions to such
global challenges as providing enough healthy food for people
everywhere, decreasing dependence on fossil fuels, and
protecting life and the environment.  For additional information
about DuPont and its commitment to inclusive innovation, please
The DuPont Oval Logo, DuPont™, The miracles of science™ and
Opteon™ are registered trademarks or trademarks of DuPont or its
* Estimates are based on the number of new model cars expected
to enter the market in the European Union and the difference in
GWP between HFO-1234yf and R-134a (GWPs of 4 and 1430,
Janet E. Smith
302-999-3144 (office)
302-379-8144 (cell) 
(bjh) NY 
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