Medical<unk>  is used to treat a type of cancer known as acute promyelocytic leukemia (APL). It may be used both in cases that are unresponsive to other agents, such as all-trans retinoic acid (ATRA) or as part of the initial treatment of newly diagnosed cases. This initial treatment may include combination therapy of<unk>  with all-trans retinoic acid (ATRA). Effectiveness appears similar to Realgar/Indigo naturalis, which can be taken by mouth and is less expensive but is less available. In the 1970s, Chinese researcher Zhang Tingdong and colleagues discovered this use. It was approved for leukemia treatment in the United States in 2000. University of Hong Kong developed a liquid form of<unk>  that can be given by mouth. Organoarsenic compounds, such as feed additives (roxarsone) and medication (neosalvarsan), are derived from<unk> . Manufacturing Industrial uses include usage as a precursor to forestry products, in colorless glass production, and in electronics. Being the main compound of<unk> , the<unk>  is the precursor to elemental<unk> ,<unk>  alloys, and<unk> e semiconductors. Bulk<unk> -based compounds sodium<unk> e and sodium cacodylate are derived from the<unk> . A variety of applications exploit<unk> 's toxicity, including the use of the oxide as a wood preservative. Copper arsenates, which are derived from<unk> , are used on a large scale as a wood preservative in the U.S. and Malaysia, but such materials are banned in many parts of the world. This practice remains controversial. In combination with copper(II) acetate,<unk>  gives the vibrant pigment known as Paris green used in paints and as a rodenticide. This application has been discontinued. Alternative medicine Despite the well known toxicity of<unk> ,<unk>  was used in traditional Chinese medicine, where it is known as pi-shuang (). In homeopathy, it is called<unk> um album. Some discredited patent medicines, e.g., Fowler's solution, contained derivatives of<unk>  oxide.
Arsenic trioxide
Arsenic trichloride
Carbon tetrachloride
Butylated hydroxytoluene
Arsenic pentafluoride
Tetrachlorodecaoxide
Coal tar
Vinyl chloride