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Phenylphosphonic dichloride is used in the preparation of 2-phenyl-[1,3,2]dioxaphosphepane-2-oxide. Further, it acts as an effective reagent for the chlorinative dehydration of some heterocycles.
Effective reagent for the chlorinative dehydration of some heterocycles, in cases where conventional reagents such as POCl3 or P2O5 fail; see, e.g.: J. Med. Chem., 14, 339 (1971):
Kızılkaya, C.; Biçen, M.; Karataş, S.; Güngör, A. Thermal, mechanical and structural investigation of copolyimide-silica hybrids containing phosphine oxide. Prog. Org. Coat. 2015, 86, 108-116.
Liang, B.; Hong, X.; Zhu, M.; Gao, C.; Wang, C.; Tsubaki, N. Synthesis of novel intumescent flame retardant containing phosphorus, nitrogen and boron and its application in polyethylene. Polym. Bull. 2015, 72 (11), 2967-2978.
Hazard Statements: H302-H314-H318
Harmful if swallowed. Causes severe skin burns and eye damage. Causes serious eye damage.
Precautionary Statements: P260u-P303+P361+P353-P305+P351+P338-P301+P330+P331-P405-P501a
IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.