1,1-dichloro-1-fluoroethane

CAS Number: 1717-00-6. Production and importation of HCFC-141b in
the US was to end on December 31, 2002, however it can be used
and sold until existing supplies are depleted. It is used as a
foaming agent, cleaning agent, and as a replacement for CFC-111
and CFC-113. Chemical formula = C2H3Cl2F. Molecular weight =
116.95 g/mol.