Benzothiazole-2-thiol
2-Mercaptobenzothiazole
CAS: 149-30-4
Molecular Formula: C7H5NS2
Benzothiazole-2-thiol - Names and Identifiers
| Name | 2-Mercaptobenzothiazole |
| Synonyms | M MBT 2-MBT Z-MBT 2-Benzothiazolethiol Rubber Accelerator M Sulfur Accelerator M Benzothiazole-2-thiol Rubber Accelerator MBT 2-Mercaptobenzothiazole 1,3-benzothiazole-2(3H)-thione Rubber Pharmaceutical intermediate Refined(M) |
| CAS | 149-30-4 |
| EINECS | 205-736-8 |
| InChI | InChI=1/C7H5NS2/c9-7-8-5-3-1-2-4-6(5)10-7/h1-4H,(H,8,9) |
Benzothiazole-2-thiol - Physico-chemical Properties
| Molecular Formula | C7H5NS2 |
| Molar Mass | 167.25 |
| Density | 1.46g/cm3 |
| Melting Point | 172-180℃ |
| Boling Point | 305°C at 760 mmHg |
| Flash Point | 138.3°C |
| Water Solubility | <0.1 g/100 mL at 19℃ |
| Solubility | Soluble in alkali and carbonate solution, soluble in glacial acetic acid in appropriate amount, almost insoluble in water. |
| Vapor Presure | 0.000844mmHg at 25°C |
| Appearance | Crystallization |
| Storage Condition | 2-8℃ |
| Sensitive | Sensitive to air and light |
| Refractive Index | 1.783 |
| MDL | MFCD00005781 |
| Physical and Chemical Properties | Density 1.42 melting point 172-180°C flash point 243°C (dec.) water solubility <0.1g/100 mL at 19°C |
| Use | Mainly used in the manufacture of tires, inner tube, tape, rubber shoes and other industrial rubber products |
Benzothiazole-2-thiol - Risk and Safety
| Hazard Symbols | Xi - Irritant N - Dangerous for the environment  |
| Risk Codes | R43 - May cause sensitization by skin contact R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S24 - Avoid contact with skin. S37 - Wear suitable gloves. S60 - This material and its container must be disposed of as hazardous waste. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | UN 3077 |
Benzothiazole-2-thiol - Upstream Downstream Industry
Benzothiazole-2-thiol - Reference
| Reference Show more | 1. Zhan, Y-H, Wei, Y-C, Zhang, H-F, Luo, M-C, Zheng, T-T, Liao, S. Analysis of the thermogenesis mechanism of natural rubber under high speed strain. Polym Adv Technol. 2020; 31: 1994– 2006. https://doi.org/10.1002/pat.4923 2. [IF=5.03] Tingting Zheng et al."Study on the ozone aging mechanism of Natural Rubber."Polym Degrad Stabil. 2021 Apr;186:109514 3. [IF=4.379] Zhan Yue-Hua et al."Effect of protein on the thermogenesis performance of natural rubber matrix."Sci Rep-Uk. 2020 Oct;10(1):1-9 4. [IF=3.665] Yue-Hua Zhan et al."Analysis of the thermogenesis mechanism of natural rubber under high speed strain."Polym Advan Technol. 2020 Sep;31(9):1994-2006 |
Benzothiazole-2-thiol - Nature
Open Data Verified Data
light yellow needle-like or plate-like monoclinic crystals with unpleasant odor and special bitterness. Insoluble in water, 25 ° C. In ethanol solubility of 2G/lOOmL, in acetone 10g/lOOmL. In carbon tetrachloride less than 0. 2G/lOOmL, moderately soluble in glacial acetic acid, soluble in alkali and alkali metal carbonate solutions. Flash point 515~520 ℃, flame can burn. By high heat decomposition, release of toxic smoke.
Last Update：2024-01-02 23:10:35
Benzothiazole-2-thiol - Introduction
Slightly smelly, with a bitter unpleasant smell. Non-toxic.
Last Update：2022-10-16 17:14:04
Benzothiazole-2-thiol - Uses and synthesis methods
chemical properties
Pale yellow monoclinic needles or flaky crystals with an unpleasant smell. Insoluble in water and gasoline, soluble in ethanol, ether, acetone, ethyl acetate, benzene, chloroform and dilute lye.
use
1. Sensitive reagents and rubber accelerators for the verification of gold, bismuth, cadmium, cobalt, mercury, nickel, lead, thallium and zinc
2. Mainly used to manufacture tires, inner tubes, tapes, rubber shoes and other industrial rubber products
3. this product is one of the effective corrosion inhibitors for copper or copper alloy. when the cooling system contains copper equipment and a certain amount of copper ions in raw water, this product can be added to prevent copper corrosion.
4, 2-mercaptobenzothiazole is an intermediate of the herbicide fenthiazide, as well as a rubber accelerator and its intermediate.
5. It is mainly used as a brightener for bright copper sulfate. It has good leveling effect. The general dosage is 0.05~0.10g/l. It can also be used as a brightener for cyanide silver plating. After 0.5g/L is added, the polarization degree of the cathode is increased, and the silver ions are aligned to form a bright silver plating layer.
6. as a general vulcanization accelerator, this product is widely used in various rubbers. It has a rapid promotion effect on natural rubber and synthetic rubber usually vulcanized with sulfur. But the use requires activation of zinc oxide and fatty acids. It is often used in conjunction with other accelerator systems, such as with dithiothiuram and dithiocarbamate tellurium, which can be used as an accelerator for butyl gums; with trisalt cis-butyl diacid lead, it can be used for light-colored water-resistant chlorosulfonated polyethylene compound. In latex, it is often combined with dithiocarbamate, and when combined with diethyldithiocarbamate diethylamine, it can be vulcanized at room temperature. The product is easily dispersed and does not pollute in rubber. However, due to its bitter taste, it is not suitable for rubber products in food contact. Accelerator M is an intermediate of accelerators MZ,DM,NS,DIBS,CA,DZ,NOBS,MDB, etc. 2-mercaptobenzothiazole is refluxed with 1-amino-4-nitroanthraquinone and potassium carbonate in dimethylformamide for 3h to prepare dye disperse brilliant red S-GL(C.I.Disperse Red 121). This dye is used for dyeing polyester and its blended fabrics. When 2-mercaptobenzothiazole is used as an electroplating additive, it is also called acid copper plating brightener M, and when it is used as a brightener for bright copper plating with copper sulfate as the main salt. In addition, the product is also used to prepare pesticide fungicides, nitrogen fertilizer synergists, cut oil and lubricating additives, organic anti-ash agents in photographic chemistry, metal corrosion inhibitors, etc. In addition, it is also a reagent for chemical analysis. The product is low in toxicity and has a stimulating effect on the skin and mucous membranes.
7. Rubber accelerator MBT(M).
8. it is a universal accelerator, mainly used in rubber products such as tires, rubber shoes, adhesive tapes, etc. Rubber products that cannot be used for food packaging due to bitter taste/p>
9. It is mainly a solvent for polyurethane synthetic leather, amino acid synthetic leather, resin vegetable oil, mineral oil, medicine, paint, and dye. It is a stabilizer for 1,1, 1-trichloroethane and is also used for plasticizers, Antioxidant, etc.
10. Wang wants to be used in IR, NR, SBR, NBR, HR and EPOM systems. at present, Wang is a major acidic vulcanizing agent with medium vulcanizing speed and can achieve higher activity when combined with other vulcanizing agents such as WIlLLING DM and WIlLLING TMTD. Its vulcanization temperature is low, it is easy to disperse in rubber and does not pollute. It is mainly used to manufacture tires, tapes, rubber shoes and other industrial rubber products, but it cannot be used as food materials.
11. Test bismuth, cobalt, copper, gold, lead, mercury, nickel, thallium and zinc. Determination of silver, cadmium, iridium, lead, platinum and rhodium by gravimetric analysis. Photometric determination of selenium and tellurium. Determination of silver by volumetric analysis. Rubber vulcanization accelerator
12. Test bismuth, cobalt, copper, gold, lead, mercury, nickel, thallium and zinc. Determination of silver, cadmium, iridium, lead, platinum and rhodium. Photometric determination of selenium and tellurium. Determination of silver by volumetric analysis. Rubber vulcanization accelerator.
13. Used as a rubber accelerator; used as an intermediate for cephalosporins and other drugs
production method
1. There are many production methods for this product, but mainly three methods using aniline, o-nitrochlorobenzene and diphenylthiourea as raw materials. 1. Aniline is usually used as raw material to directly react aniline, carbon disulfide and sulfur in an autoclave. Aliphatic amine, dimethylformamide, trithiazolidine and formaldehyde can also be used instead of carbon disulfide to make aniline React with sulfur under pressure. The method using aniline as raw material has high reaction pressure, generally above 4MPa and up to 15MPa, so it is also called high pressure method. 2. The reaction of o-nitrochlorobenzene as raw material o-nitrochlorobenzene and reducing agent sodium hydrosulfide, sodium polysulfide or hydrogen sulfide can be reduced to o-amino thiophenol. Further react with carbon disulfide to prepare accelerator M. Some of these methods have a longer reaction time (sodium hydrosulfide takes about 20h), but they can be carried out under normal pressure or lower pressure, also known as the normal pressure method. 3. Using diphenylthiourea as raw material, the reaction pressure of this method is between the above two methods, below 4MPa, which is generally called medium pressure method.
2. water treatment agent 03301
3. its preparation method is to use o-chloronitrobenzene, sodium polysulfide and carbon disulfide as raw materials, react at 110~130 ℃ and 343kPa pressure to generate 2-mercaptobenzothiazole sodium salt, and then acidify with sulfuric acid and wash with water to obtain the product.
aniline, carbon disulfide and sulfur can also be reacted at about 200 ℃, and then kept at 7.85 MPa pressure and 250~260 ℃ for 2.5 h to obtain 2-mercaptobenzothiazole. sodium hydroxide is dissolved into sodium salt, acidified to pH = 9, filtered, the filtrate is acidified and neutralized at 38~40 ℃, washed with water and dried to obtain the product.
4. add aniline, carbon disulfide and sulfur to the condensation kettle in turn. Its feeding ratio is (mol): 1: 0.96: 0.36. Heating to about 260 ℃ at 8.1MPa. The condensation reaction ended after 2h. 2-mercaptobenzothiazole crude product. Cool down and transfer it to a neutralization kettle. Add 7~8 ° Bé lye to neutralize, filter, discard impurities, transfer the filtrate into an acidification kettle, and add 10 ° Bé sulfuric acid to acidify to a pH value of 6~7. Filter, wash the cake with water twice, dry, crush, and sift to package the finished product.
category
Pesticides
toxicity classification
High toxicity
acute toxicity
oral-rat LD50: 100 mg/kg; Abdominal-mouse LD50: 100 mg/kg
flammability hazard characteristics
Contact acid to decompose sulfur oxides and nitrogen oxide gases; combustion produces toxic nitrogen oxides and sulfur oxide smoke
storage and transportation features
Ventilated and dry at low temperature; stored separately from warehouse food raw materials, acids and oxidants
fire extinguishing agent
Dry powder, foam, sand, carbon dioxide, mist water
Last Update：2024-05-21 11:30:13
Benzothiazole-2-thiol - Security information
| WGK Germany | 2 |
| RTECS number | DL6475000 |
| auto-ignition temperature | 465 °C |
| TSCA | Yes |
| HazardClass | 9 |
| PackingGroup | III |
| customs code | 29342020 |
| toxic substance data | 149-30-4(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 1680 mg/kg LD50 dermal Rabbit > 7940 mg/kg |
Last Update：2024-05-21 11:30:32
Benzothiazole-2-thiol - Nature
| Vapor pressure | <0.000003 hPa (25 °C) |
| refractive index | 1.6100 (estimate) |
| flash point | 243 °C |
| storage conditions | Store below +30°C. |
| solubility | 0.12g/l |
| acidity coefficient (pKa) | 9.80±0.20(Predicted) |
| morphology | Powder |
| color | Yellow |
| Odor | Odorless |
| PH value | 7 (0.12g/l, H2O, 25℃) |
| explosion limit value (explosive limit) | 15%(V) |
| water solubility | <0.1 g/100 mL at 19 °C |
| maximum wavelength (& lambda;max) | 325nm(MeOH)(lit.) |
| sensitivity | Air Sensitive |
| Merck | 14,5868 |
| BRN | 119484 |
| stability | Stable. Incompatible with strong oxidizing agents. Flammable. |
| InChIKey | YXIWHUQXZSMYRE-UHFFFAOYSA-N |
| (IARC) Carcinogen Classification | 2A (Vol. 115) 2018 |
| NIST chemical information | 2-Mercaptobenzothiazole(149-30-4) |
| EPA chemical information | 2-Mercaptobenzothiazole (149-30-4) |
Last Update：2024-09-03 13:05:16
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View History
Raw Materials for Benzothiazole-2-thiol
缓蚀剂
PBTCA类缓蚀剂
胶管
N,N-二环己基-2-苯并噻唑次磺酰胺
N-环己基-2-苯并噻唑次磺酰胺
胶板
2-苯并噻唑基-N-吗啉基硫醚
N-叔丁基-2-苯并噻唑次磺酰胺
2-氯苯并噻唑
2-甲氨基苯并噻唑
QⅠ-105阻垢剂
促进剂DBM
PBTCA类缓蚀剂
胶管
N,N-二环己基-2-苯并噻唑次磺酰胺
N-环己基-2-苯并噻唑次磺酰胺
胶板
2-苯并噻唑基-N-吗啉基硫醚
N-叔丁基-2-苯并噻唑次磺酰胺
2-氯苯并噻唑
2-甲氨基苯并噻唑
QⅠ-105阻垢剂
促进剂DBM
Downstream Products for Benzothiazole-2-thiol
2,2'-Dithiobis(benzothiazole)
N,N-Dicyclohexyl-2-benzothiazolsulfene amide
N-tert-Butyl-2-benzothiazolesulfenamide
scale inhibitor and sipersant TS-104
scale agent QⅠ-105
Accelerator DBM
2-((Difluoromethyl)sulfonyl)benzo[d]thiazole, 98%
2-Amino-6-nitrobenzothiazole
N,N-Dicyclohexyl-2-benzothiazolsulfene amide
N-tert-Butyl-2-benzothiazolesulfenamide
scale inhibitor and sipersant TS-104
scale agent QⅠ-105
Accelerator DBM
2-((Difluoromethyl)sulfonyl)benzo[d]thiazole, 98%
2-Amino-6-nitrobenzothiazole