S-Benzylthiuronium Chloride
Title: S-Benzylthiuronium Chloride
CAS Registry Number: 538-28-3
CAS Name: Carbamimidothioic acid phenylmethyl ester monohydrochloride
Molecular Formula: C8H11ClN2S
Molecular Weight: 202.70
Percent Composition: C 47.40%, H 5.47%, Cl 17.49%, N 13.82%, S 15.82%
Literature References: Prepd by refluxing a mixture of 126 g benzyl chloride, 76 g thiourea, and 200 ml alcohol for 0.5 hr: Donleavy, J. Am. Chem. Soc. 58, 1004 (1936).
Properties: Crystals from alc or dil HCl, mp 172-174°. Metastable form, mp 146-148°. Can be converted to the higher melting form by dissolving in alcohol and seeding with crystals, mp 172-174°.
Melting point: mp 172-174°; mp 146-148°; mp 172-174°
Use: Reagent for cobalt and nickel; identification and separation of carboxylic, sulfinic, and sulfonic acid.

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