We've included information regarding flammability, toxicity, risk assessments, and potential climate change impact to address the environmental and safety aspects of DuPont™ Opteon™ YF refrigerant (HFO-1234yf).
» Also refer to Regulatory information
Opteon™ YF (HFO-1234yf) is a mildly flammable (as measured by ASTM E681) refrigerant for use in automotive air-conditioning. It is difficult to ignite and has slow flame propagation (1.5 cm/sec). Independent laboratories have run extensive testing and concluded that the risks associated with Opteon™ YF (HFO-1234yf) flammability did not need to be mitigated by significant system redesign (e.g., secondary loop).
» Refrigerant Flammability Basics [.pdf]
» Refrigerant Flammability Data
Opteon™ YF (HFO-1234yf) has been evaluated by independent laboratories for acute toxicity and long term toxicity. It features low acute toxicity similar to HFC-134a. Long-term toxicity results to date are also favorable and requirements at manufacturing sites or service centers (occupational health) are expected to be similar to current refrigerant.
Acute toxicity tests are conducted to evaluate the adverse effects produced by a single exposure to the test substance. Acute toxicity data is useful for understanding likely impact of inadvertent/accidental substance releases. Acute tests are generally conducted by exposing laboratory animals via the most likely route of exposure. For example highly volatile compounds are tested via inhalation, rather than by a dermal or oral route. Acute toxicity tests are generally in the first tier of toxicity testing.
» Summary [.pdf]
» 2008 SAE ARSS Flammability Assessment of 1234yf [.pdf]
» 2008 SAE - CRP Risk Assessment of HFO-1234yf [.pdf]
» 2007 B Cool Safety Assessment of CO2 [.pdf]
» Atmospheric Chemistry of HFO-1234yf [.pdf]
» VOC of HFO-1234yf [.pdf]
» 2008 VDA - Green MAC LCCP® [.pdf]
» 2006 SAE - EU ACEA Armines Leak Study [.pdf]
» More information on climate change