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ChemicalBook >> CAS DataBase List >>2-Mercaptobenzothiazole


Chemical Name:
MBT;2-MBT;MERCAPTOBENZOTHIAZOLE;Benzo[d]thiazole-2(3H)-thione;2-BENZOTHIAZOLETHIOL;2-Benzothiazolethiol (MBT);Accelerator M;2-Merkaptobenzotiazol;benzothiazole-2-thiol;2-Mercaptobenzthiazole
Molecular Formula:
Molecular Weight:
MDL Number:
MOL File:
MSDS File:
Last updated:2023-10-31 18:45:31

2-Mercaptobenzothiazole Properties

Melting point 177-181 °C(lit.)
Boiling point 223°C (rough estimate)
Density 1.42
vapor pressure <0.000003 hPa (25 °C)
refractive index 1.6100 (estimate)
Flash point 243 °C
storage temp. Store below +30°C.
solubility 0.12g/l
form Powder
pka 9.80±0.20(Predicted)
color Yellow
PH 7 (0.12g/l, H2O, 25℃)
Odor Odorless
explosive limit 15%(V)
Water Solubility <0.1 g/100 mL at 19 ºC
Sensitive Air Sensitive
λmax 325nm(MeOH)(lit.)
Merck 14,5868
BRN 119484
Stability Stable. Incompatible with strong oxidizing agents. Flammable.
LogP 2.86
Indirect Additives used in Food Contact Substances 2-MERCAPTOBENZOTHIAZOLE
FDA 21 CFR 175.105; 176.300; 177.2600
CAS DataBase Reference 149-30-4(CAS DataBase Reference)
EWG's Food Scores 5
Proposition 65 List 2-Mercaptobenzothiazole
IARC 2A (Vol. 115) 2018
NIST Chemistry Reference 2-Mercaptobenzothiazole(149-30-4)
EPA Substance Registry System 2-Mercaptobenzothiazole (149-30-4)
Pesticides Freedom of Information Act (FOIA) 2,Mercaptobenzothiazole


Risk and Safety Statements

Symbol(GHS)  GHS hazard pictogramsGHS hazard pictograms
Signal word  Warning
Hazard statements  H317-H410
Precautionary statements  P261-P272-P273-P280-P302+P352-P333+P313
Hazard Codes  Xi,N
Risk Statements  43-50/53
Safety Statements  24-37-60-61
RIDADR  UN 3077 9/PG 3
WGK Germany  2
RTECS  DL6475000
Autoignition Temperature 465 °C
HazardClass  9
PackingGroup  III
HS Code  29342020
Toxicity LD50 orally in Rabbit: 1680 mg/kg LD50 dermal Rabbit > 7940 mg/kg
NFPA 704
3 0

2-Mercaptobenzothiazole price More Price(45)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich M3302 2-Mercaptobenzothiazole 97% 149-30-4 1kg $65.9 2023-06-20 Buy
Sigma-Aldrich 8.14674 2-Mercaptobenzothiazole for synthesis 149-30-4 250g $44.1 2023-06-20 Buy
Sigma-Aldrich 8.14674 2-Mercaptobenzothiazole for synthesis 149-30-4 1kg $75.7 2023-06-20 Buy
Sigma-Aldrich 63730 2-Mercaptobenzothiazole technical, ≥90% (T) 149-30-4 250g $34.8 2023-01-07 Buy
TCI Chemical M0247 2-Mercaptobenzothiazole 149-30-4 5G $19 2023-06-20 Buy
Product number Packaging Price Buy
M3302 1kg $65.9 Buy
8.14674 250g $44.1 Buy
8.14674 1kg $75.7 Buy
63730 250g $34.8 Buy
M0247 5G $19 Buy

2-Mercaptobenzothiazole Chemical Properties,Uses,Production


Mercaptobenzothiazole is a rubber chemical, an accelerant of vulcanization. It is contained in the "mercapto mix". The most frequent occupational categories are metal industry, homemakers, health services and laboratories, building industries, and shoemakers. It is also used as a corrosion inhibitor in cutting fluids or in releasing fluids used in the pottery industry.

Chemical Properties

pale yellow monoclinic needle-like or flaky crystals with a disagreeable odor. Insoluble in water and gasoline, soluble in ethanol, ethyl ether, acetone, ethyl acetate, benzene, chloroform and dilute alkali solution.


2-Mercaptobenzothiazole (MBT) is an industrial chemical that is used principally in the manufacture of rubber.Vulcanization accelerator for type of rubber usually used in the production of household rubber gloves rather than medical rubber gloves; corrosion inhibitor in metal-working fluids, detergents, antifreeze, and photographic emulsions. In addition, 2-MBT is formed as a reaction product from some vulcanisation accelerators in elastomer production.


2-mercaptobenzothiazole is an accelerator, retarder, and peptizer for natural and other rubber products, but is also used as a corrosion inhibitor in soluble cutting oils and antifreeze mixtures; in greases, adhesives, photographic-film emulsions; detergents; veterinary products, such as tick and flea powders and sprays.It is added to polyether polymers as a stabilizer to resist damage by air and ozone, and is a component approved in the USA in some skin medications for dogs (HSDB, 2015).
2-Mercaptobenzothiazole is also used as an intermediate in the production of pesticides such as 2-(thiocyanomethylthio)benzothiazole (Azam & Suresh, 2012), and sodium and zinc salts of 2-mercaptobenzothiazole are approved for use as pesticides by the EPA (1994).


2-Mercaptobenzothiazole is produced by reacting aniline, carbon disulfide, and sulfur at high temperature and pressure; the product is then purified by dissolution in a base to remove the dissolved organics. Re-precipitation is achieved by the addition of acid (Kirk-Othmer, 1982; NTP, 1988).
Refined 2-mercaptobenzothiazole was produced by recrystallization from 2-mercaptobenzothiazole with industrial grade and oxidized to 2,2'-dithiobis(benzothiazole), using oxygen as an oxidant, nitric oxide as a oxygen carrier and alcohols as solvents, in a circulating fluidized reactor under one-step oxidation. 2,2'-Dithiobis(benzothiazole) was thus obtained with high purity up to 99 %, melting point at 183 oC, high yield over 98 %, through the optimization of reaction parameters as reaction time, temperature, reactants ratio, with less waste generation and emission during the production process. Alcohol solvents can be reused after purification.


ChEBI: 2-Mercaptobenzothiazole is a 1,3-Benzothiazole substituted at the 2-position with a sulfanyl group. It is used as a vulcanisation accelerator in the crosslinking of rubber.

Synthesis Reference(s)

The Journal of Organic Chemistry, 26, p. 3436, 1961 DOI: 10.1021/jo01067a101

General Description

Pale yellow to tan crystalline powder with a disagreeable odor.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

2-Mercaptobenzothiazole is incompatible with strong oxidizing agents. Also incompatible with acids and acid fumes.

Health Hazard

Thiazoles cause allergic skin reactions of type IV [delayed-type hypersensitivity (DTH)].
2-mercaptobenzothiazole is a Standardized Chemical Allergen. The physiologic effect of 2-mercaptobenzothiazole is by means of Increased Histamine Release, and Cell-mediated Immunity.

Fire Hazard

2-Mercaptobenzothiazole is combustible.

Safety Profile

Suspected carcinogen withexperimental carcinogenic and tumorigenic data. Poisonby ingestion and intraperitoneal routes. Experimentalteratogenic and reproductive effects. Mutation datareported. Incompatible with oxidizers. When heated todecomposition


2-Mercaptobenzothiazole has a sensitizing effect, and with chronic exposure (e.g., through the use of rubber gloves) it may induce skin reactions. 2-Mercapto-1-methylimidazole displays teratogenic effects in humans, and it is suspected of being a carcinogen. 6-Mercaptopurine derivatives influence cell division, and have been employed as cytostatic agents. They have been found to be teratogenic in animal studies. Methylthio-substituted triazines, which are used as herbicides, are only slightly toxic. The corresponding LD50 or LC50 values derived from animal studies are above the level of 1000 mg/ kg. Similar values have been established for a methylthiotriazinone that is the active ingredient in the herbicide Sencor.


MBT was not mutagenic in Ames bacterial assays, but it induced chromosomal damage in mammalian cells in culture. Reproductive effects were not observed in two-generation studies of rats treated with up to 15,000 ppm MBT in the diet.

Purification Methods

Crystallise it repeatedly from 95% EtOH, or purify it by incomplete precipitation by dilute H2SO4 from a basic solution, followed by several crystallisations from acetone/H2O or *benzene. It complexes with Ag, Au, Bi, Cd, Hg, Ir, Pt, and Tl. [Beilstein 27 II 233, 27 III/IV 2709.]

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View Lastest Price from 2-Mercaptobenzothiazole manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
2-Mercaptobenzothiazole pictures 2023-12-07 2-Mercaptobenzothiazole
US $5.00 / kg 1kg ≥99% 200mt/year Jinan Finer Chemical Co., Ltd
2-Mercaptobenzothiazole pictures 2023-12-07 2-Mercaptobenzothiazole
US $80.00-60.00 / kg 1kg 99% 20Tons Hebei Dangtong Import and export Co LTD
2-Mercaptobenzothiazole pictures 2023-10-31 2-Mercaptobenzothiazole
US $0.00-0.00 / kg 1kg 99% 50000kg Hebei Yibangte Import and Export Co. , Ltd.
2-Benzothiazolethiol (MBT) Sulfur Accelerator M 2-mercaptobenzothialole 2-Mercaptobenzothiazole (2-MBT) 2-mercaptobenzothiazole(mbt) 2-Mercaptobenzthiazole 2-Mercptobenzothiazole 2-Merkaptobenzotiazol 2-merkaptobenzotiazol(polish) 2-Merkaptobenzthiazol Accel M AccelaratorMBT Accelerator M Accelerator mercapto accelerator(m) AcceleratorM accelm AG 63 Benzothiazole, 2-mercapto- Benzothiazole, mercapto- Benzothiazole-2-thione Benzothiazolethiol Dermacid Drmacid Ekagom G ekagomg Kaptaks Kaptax MBT, captax Mebetizole Mebithizol Mercaptobenzothiazol Mercaptobenzthiazole Mertax NCI-C56519 Nocceler M Nuodeb 84 nuodex84 Pennac mbt powder pennacmbtpowder Perkacit MBT p-Methylbenzothiazole Pneumax MBT pneumaxmbt Rokon Royal MBT royalmbt Soxinol M soxinolm Sulfadene Thiotax USAF gy-3 USAF xr-29 usafgy-3 usafxr-29 Vulkacit M Vulkacit M, vulkacit merkapto/c Vulkacit Mercapto
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