In 2010, The U.S. Environmental Protection Agency (EPA) issued
a significant new use rule (SNUR) under the Toxic Substances
Control Act (TSCA) for the chemical substance, HFO-1234yf. The
rule states: "The EPA is further addressing the issue of risks
to DIYers in the Significant New Use Rule for 1-propene-
2,3,3,3-tetrafluoro- (75 FR 65987, Oct. 27, 2010). This SNUR
requires submission of a SNUN at least 90 days before sale or
distribution of products intended for use by a consumer for
the purpose of servicing, maintenance and disposal involving
HFO-1234yf."
As previously stated, the action requires persons who intend to manufacture, import or process the chemical substance for a use that is designated as a significant new use by this final rule, to notify the EPA at least 90 days prior to official use. The required notification would then provide the EPA with the opportunity to evaluate the intended use and, if necessary, to prohibit or limit that activity before it occurs.
The Automotive Service Association (ASA), in a 2010 letter, asked that the EPA include both a certification process and an equipment requirement for any purchasers of HFO-1234fy due to the flammability of the proposed substitute. The EPA’s most recent response states, “While this final rule effectively prohibits DIY use because the final use conditions do not include unique fittings allowing for use with small refrigerant containers, we are not making any final determination about whether HFO-1234yf may be safely used by DIYers.”This latest EPA action finalized approval for the new refrigerant in motor vehicle air conditioning systems.
To view the regulation, visit www.TakingTheHill.com.
