National Toxicology Program

Selected information from two of the National Library of Medicine's databases: ChemIDPlus¹ and HSDB².

Names (NTP)

• 2-Mercaptobenzothiazole
• 2(3H)-BENZOTHIAZOLETHIONE (9CI)
• MBT

Structure

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Chemical Properties²

Property	Description
Color/Form	PALE, YELLOW MONOCLINIC NEEDLES OR LEAFLETS YELLOWISH POWDER NEEDLES FROM ALC OR DILUTE METHANOL Yellowish to tan crystalline powder
Odor	DISAGREEABLE ODOR DISTINCTIVE ODOR (DEPENDS ON DEGREE OF PURIFICATION)
Taste	None found
Boiling Point	None found
Melting Point	180.2-181.7 DEG C
Molecular Weight	167.25
Corrosivity	None found
Critical Temperature & Pressure	None found
Density/Specific Gravity	1.42
Disassociation Constants	The dissociation constant for 2-mercaptobenzothiazole is between 6.7 and 7.2.
Heat of Combustion	None found
Heat of Vaporization	None found
log P (octanol-water)	log Kow = 2.41
pH	None found
Solubilities	PRACTICALLY INSOL IN WATER; SOLUBILITY @ 25 DEG C (G/100 ML): ALC 2.0; ETHER 1.0; ACETONE 10.0; BENZENE 1.0; CARBON TETRACHLORIDE LESS THAN 0.2; NAPHTHA LESS THAN 0.5; MODERATELY SOL IN GLACIAL ACETIC ACID; SOL IN ALKALIES & ALKALI CARBONATE SOLN SOL IN DIL CAUSTIC SODA, ALCOHOL, CHLOROFORM; INSOL IN GASOLINE SOL IN HOT ACETIC ACID MORE SOL IN CRUDE SWEAT THAN IN WATER
Spectral Properties	MAX ABSORPTION (METHANOL): 235 NM (LOG E= 4.12); 282 NM SHOULDER (LOG E= 3.34); 320 NM (LOG E= 4.43); SADTLER REF NUMBER: 11493 (IR, PRISM); 8139 (IR, GRATING) Intense mass spectral peaks: 167 m/z (100%), 69 m/z (33%), 45 m/z (23%), 63 m/z (20%) IR: 6034 (Coblentz Society Spectral Collection) UV: 390 (Sadtler Research Laboratories Spectral Collection) NMR: 10149 (Sadtler Research Laboratories Spectral Collection) MASS: 1092 (Atlas of Mass Spectral Data, John Wiley & Sons, New York)
Surface Tension	None found
Vapor Density	None found
Vapor Pressure	None found
Relative Evaporation Rate	None found
Viscosity	None found
Other Properties	CONVERSION FACTOR: 6.83 MG/CU M= 1 PPM MP: 170-173 deg C /Technical mercaptobenzothiazole/ Light yellow powder; specific gravity: 1.70 @ 25 deg C/4 deg C. /Zinc salt of mercaptobenzothiazole/

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Uses²

• SALTS USED AS FUNGICIDE/S/
  
• FUNGICIDE FOR PRESERVING TEXTILES /SRP: FORMER USE/ **PEER REVIEWED**
  
• Vulcanization accelerator for rubber (requires use of stearic acid for full activation), tire treads and carcasses, mechanical specialities; corrosion inhibitor in cutting oils and petroleum products, extreme pressure additive in greases.
  
• MEDICATION (VET) **QC REVIEWED**
  

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Superlist Classes¹

• None found

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Notes (Sources: NTP,HSDB,RTECS,MESH)¹

• None found

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Other Registry Numbers¹

• 112242-83-8
  
• 119170-41-1
  
• 12640-90-3
  
• 4464-58-8
  
• 55199-93-4
  
• 81605-65-4
  

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Synonyms (Sources: NTP, HSDB,RTECS,MESH)¹

• Accel M
• Accelerator M
• 2-Benzothiazolethiol
• Benzothiazole-2-thione
• 2(3H)-Benzothiazolethione
• 2-Benzothiazolinethione
• 2-Benzothiazolyl mercaptan
• Captax
• Dermacid
• Ekagom G
• HSDB 4025
• Kaptaks
• Kaptax
• MBT
• 2-MBT
• Mebetizole
• Mebithizol
• Mercaptobenzothiazole
• 2-Mercaptobenzothiazole
• Mercaptobenzthiazole
• 2-Mercaptobenzthiazole
• Mertax
• NCI-C56519
• Nuodex 84
• Pennac MBT powder
• Pneumax MBT
• Rokon
• Rotax
• Royal MBT
• Soxinol M
• Sulfadene
• Thiotax
• USAF GY-3
• USAF XR-29
• Vulkacit M
• Vulkacit mercapto
• Vulkacit mercapto/C

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Links to Additional Information¹

• PubMed AIDS
• PubMed Cancer
• CCRIS
• DART
• EINECS
• EMIC
• Haz-Map
• HSDB
• PubMed
• MeSH
• PubMed Toxicology
• TOXLINE
• TOXMAP
• TRI2000
• TRI2001
• TRI2002
• TRI95
• TRI96
• TRI97
• TRI98
• TRI99
• PubChem
• TRI2003
• TRI2004
• TRI2005

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Footnotes

¹ Source: the National Library of Medicine's ChemIDPlus, 10/28/2007.

² Source: the National Library of Medicine's Hazardous Substance Database, 10/28/2007.