2-Mercaptobenzothiazole
Title: 2-Mercaptobenzothiazole
CAS Registry Number: 149-30-4
CAS Name: 2(3H)-Benzothiazolethione
Additional Names: 2-benzothiazolethiol; MBT
Trademarks: Captax; Dermacid; Mertax; Thiotax
Molecular Formula: C7H5NS2
Molecular Weight: 167.25
Percent Composition: C 50.27%, H 3.01%, N 8.37%, S 38.34%
Literature References: Prepd industrially by reacting aniline, carbon disulfide, and sulfur at elevated press. and temps: Kelly, US 1631871. Purification by treatment with a per-acid salt in alkaline medium: Weyker, Ebel, US 2730528 (1956 to Am. Cyanamid). Improved process: Szlatinay, US 3031073 (1962 to Monsanto).
Properties: Pale yellow, monoclinic needles or leaflets. Disagreeable odor. d 1.42. mp 180.2-181.7° (the technical product mp 170-175°). Practically insol in water. Soly at 25° (g/100 ml) in alcohol: 2.0; ether 1.0; acetone 10.0; benzene 1.0; carbon tetrachloride <0.2; naphtha <0.5. Moderately sol in glacial acetic acid. Sol in alkalies and alkali carbonate solns.
Melting point: mp 180.2-181.7° (the technical product mp 170-175°)
Density: d 1.42
 
Derivative Type: Zinc salt
Trademarks: Bantex
Properties: Light yellow powder, d425 1.70.
Density: d425 1.70
 
Derivative Type: Sodium salt
Trademarks: Nuodex 84
 
Use: Rubber vulcanization accelerator. Salts used as fungicide.

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