Phentetiothalein Sodium
Title: Phentetiothalein Sodium
CAS Registry Number: 18265-54-8
CAS Name: 4,5,6,7-Tetraiodophenolphthalein sodium
Additional Names: 3,3-bis(4-hydroxyphenyl)-4,5,6,7-tetraiodo-1(3H)-isobenzofuranone disodium salt; 3,4,5,6-tetraiodophenolphthalein disodium salt; phenoltetraiodophthalein sodium
Trademarks: Iso-Iodeikon
Molecular Formula: C20H8I4Na2O4
Molecular Weight: 865.87
Percent Composition: C 27.74%, H 0.93%, I 58.63%, Na 5.31%, O 7.39%
Literature References: Prepd by the condensation of phenol and tetraiodophthalic acid or its anhydride: Orndorff, Black, Am. Chem. J. 41, 349 (1909); Zalkind, Belikova, Zh. Prikl. Khim. 8, 1210 (1935). Isomeric with iodophthalein sodium, q.v.
Properties: Bronze-purple, odorless, slightly hygroscopic granules. Dec on exposure becoming incompletely sol. Sol in water, alcohol. Keep tightly closed.
Therap-Cat: Diagnostic aid (radiopaque medium¾cholecystography and hepatic function).
Keywords: Diagnostic Aid (Radiopaque Medium).

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