The present disclosure provides purified forms of iobenguane and preparations of a precursor to iobenguane, such as a polymer, the polymer comprising a monomer of formula (I)

##STR00001##

or a pharmaceutically acceptable salt thereof, the preparation comprising leachable tin at a level of 0 ppm to 850 ppm.

The present disclosure provides purified forms of iobenguane and preparations of a precursor to iobenguane, such as a polymer, the polymer comprising a monomer of formula (I)

##STR00001##

or a pharmaceutically acceptable salt thereof, the preparation comprising leachable tin at a level of 0 ppm to 850 ppm.

The present invention relates to an ethylene and propylene ionomer and a process for the preparation of an ethylene and propylene ionomer.

The present invention relates to an ethylene and propylene ionomer and a process for the preparation of an ethylene and propylene ionomer.

The present invention relates to a semi-crystalline polyolefinic ionomer and a process for the preparation of a semi-crystalline polyolefinic ionomer.

The present invention relates to a semi-crystalline polyolefinic ionomer and a process for the preparation of a semi-crystalline polyolefinic ionomer.

The present invention relates to an amorphous functionalized olefin copolymer composition and a process for the preparation of an amorphous functionalized olefin copolymer composition.

The present invention relates to an amorphous functionalized olefin copolymer composition and a process for the preparation of an amorphous functionalized olefin copolymer composition.

The present invention relates to a semi-crystalline functionalized olefin copolymer composition and a process for the preparation of a semi-crystalline functionalized olefin copolymer composition.

The present invention relates to a semi-crystalline functionalized olefin copolymer composition and a process for the preparation of a semi-crystalline functionalized olefin copolymer composition.