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2-Mercaptobenzimidazole

Description Reference
Product Name
2-Mercaptobenzimidazole
CAS No.
583-39-1
Chemical Name
2-Mercaptobenzimidazole
Synonyms
1H-BENZO[D]IMIDAZOLE-2-THIOL;Mercaptobenzimidazole;Vulkanox;SuMilizer MB;Benzimidazole-2-thiol;2-BENZIMIDAZOLETHIOL;Benzimidazol-2-thiol;2-Mercapto benzanidazole;AOMB;asmmb
CBNumber
CB8490256
Molecular Formula
C7H6N2S
Formula Weight
150.2
MOL File
583-39-1.mol
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2-Mercaptobenzimidazole Property

Melting point:
300-304 °C (lit.)
Boiling point:
270.6±23.0 °C(Predicted)
Density 
1.42
vapor pressure 
0-0.001Pa at 25℃
refractive index 
1.5500 (estimate)
Flash point:
>250°C
storage temp. 
2-8°C
solubility 
0.3g/l
form 
Powder
pka
10.24±0.10(Predicted)
color 
White to beige
Water Solubility 
<0.1 g/100 mL at 23.5 ºC
Merck 
14,1082
BRN 
119867
Stability:
Stable. Incompatible with strong oxidizing agents.
LogP
0.88-1.66 at 20-25℃
CAS DataBase Reference
583-39-1(CAS DataBase Reference)
NIST Chemistry Reference
2-Mercaptobenzimidazole(583-39-1)
EPA Substance Registry System
2-Mercaptobenzimidazole (583-39-1)
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Safety

Hazard Codes 
Xn
Risk Statements 
20/21/22-36/37/38-22
Safety Statements 
26-36-24/25
RIDADR 
UN 2811 6.1/PG 3
WGK Germany 
2
RTECS 
DE1050000
Autoignition Temperature
480 °C
TSCA 
Yes
HazardClass 
6.1
PackingGroup 
III
HS Code 
29339910
Toxicity
LD50 orally in Rabbit: 300 mg/kg
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H301Toxic if swalloed

H317May cause an allergic skin reaction

H373May cause damage to organs through prolonged or repeated exposure

H412Harmful to aquatic life with long lasting effects

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P273Avoid release to the environment.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P310IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P314Get medical advice/attention if you feel unwell.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
PHR3123
Product name
Rabeprazole Related Compound C
Purity
pharmaceutical secondary standard, certified reference material
Packaging
50MG
Price
$549
Updated
2025/07/31
Sigma-Aldrich
Product number
1598042
Product name
Rabeprazole Related Compound C
Purity
United States Pharmacopeia (USP) Reference Standard
Packaging
25mg
Price
$1300
Updated
2025/07/31
Sigma-Aldrich
Product number
51810
Product name
2-Mercaptobenzimidazole
Purity
analytical standard
Packaging
50mg
Price
$63
Updated
2022/05/15
TCI Chemical
Product number
B0055
Product name
2-Mercaptobenzimidazole
Purity
>98.0%(HPLC)(T)
Packaging
25g
Price
$16
Updated
2025/07/31
TCI Chemical
Product number
B0055
Product name
2-Mercaptobenzimidazole
Purity
>98.0%(HPLC)(T)
Packaging
500g
Price
$85
Updated
2025/07/31
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2-Mercaptobenzimidazole Chemical Properties,Usage,Production

Description

2-Mercaptobenzimidazole is a very useful corrosion inhibitor and cleaner. It can be used to remove the mercury (II) from aqueous solutions and chlor-alkali industry wastewater1. It can be added to the surface film to inhibit the corrosion of metals like copper2-3 and mild steel4. It can also be used as the carrier for the coated-wire mercury (II)-selective electrodes5.
2-Mercaptobenzimidazole is also used as an anti-degradant. It is utilized for protecting rubber from oxidation. It is also employed as an intermediate in the preparation of rabeprazole. Further, it finds application in anti-leprosy drugs in medicine6.

Reference

  1. Manohar, D. M., K. A. Krishnan, and T. S. Anirudhan. "Removal of mercury (II) from aqueous solutions and chlor-alkali industry wastewater using 2-mercaptobenzimidazole-clay." Water Research 36.6(2002):1609.
  2. Chadwick, D., and T. Hashemi. "Electron spectroscopy of corrosion inhibitors: Surface films formed by 2-mercaptobenzothiazole and 2-mercaptobenzimidazole on copper." Surface Science 89.1(1979):649-659.
  3. Trachli, B., et al. "Protective effect of electropolymerized 2-mercaptobenzimidazole upon copper corrosion." Progress in Organic Coatings 44.1(2002):17-23.
  4. Wang, Lin. "Evaluation of 2-mercaptobenzimidazole as corrosion inhibitor for mild steel in phosphoric acid." Corrosion Science 43.12(2001):2281-2289.
  5. Mazloum, M, M. K. Amini, and I. Mohammadpoor-Baltork. "Mercury selective membrane electrodes using 2-mercaptobenzimidazole, 2-mercaptobenzothiazole, and hexathiacyclooctadecane carriers." Sensors & Actuators B Chemical 63.1(2000):80-85.
  6. https://www.alfa.com/en/catalog/A18350/

Chemical Properties

yellow or white crystals

Uses

An antidegradant, protecting rubber from oxidation. An intermediate in the synthesis of Rabeprazole (R070500)

Uses

2-Mercaptobenzimidazole is used as an antidegradant. It is utilized for protecting rubber from oxidation. It is also employed as an intermediate in the preparation of rabeprazole. Further, it finds application in anti-leprosy drugs in medicine. In addition to this, it is used as a copper plating brightener.

Synthesis Reference(s)

Organic Syntheses, Coll. Vol. 4, p. 569, 1963
The Journal of Organic Chemistry, 29, p. 3209, 1964 DOI: 10.1021/jo01034a020

General Description

White to yellow crystals or cream colored powder. Slight odor.

Air & Water Reactions

Dust explosion: 0.140 oz/ft3. Insoluble in water. 2-Mercaptobenzimidazole is moisture sensitive. .

Reactivity Profile

An organosulfide and an amine. Organosulfides are incompatible with acids, diazo and azo compounds, halocarbons, isocyanates, aldehydes, alkali metals, nitrides, hydrides, and other strong reducing agents. Reactions with these materials generate heat and in many cases hydrogen gas. Many of these compounds may liberate hydrogen sulfide upon decomposition or reaction with an acid. Amines are chemical bases. They neutralize acids to form salts plus water. These acid-base reactions are exothermic. The amount of heat that is evolved per mole of amine in a neutralization is largely independent of the strength of the amine as a base. Amines may be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen is generated by amines in combination with strong reducing agents, such as hydrides.

Fire Hazard

Flash point data for 2-Mercaptobenzimidazole are not available; however, 2-Mercaptobenzimidazole is probably combustible.

Flammability and Explosibility

Non flammable

Safety Profile

Poison by intraperitoneal and intravenous routes. Moderately toxic by ingestion. Skin and eye irritant. When heated to decomposition it emits toxic fumes of SO, and NO,. See also MERCAPTANS.

Purification Methods

Crystallise it from aqueous EtOH, AcOH or aqueous ammonia. It complexes with many metals. [Brown J Chem Soc 1976 1958, Beilstein 24 II 65, 24 III/IV 287.]

2-Mercaptobenzimidazole Preparation Products And Raw materials

Raw materials

Ethanol Potassium hydroxide Sodium sulfide 2-Nitrochlorobenzene Carbon disulfide 2-Nitroaniline o-Phenylenediamine

Preparation Products

1H-BENZIMIDAZOLE-2-SULFONIC ACID Lansoprazole
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View Lastest Price from 2-Mercaptobenzimidazole manufacturers

Hebei Chuanghai Biotechnology Co,.LTD
Product
2-Mercaptobenzimidazole 583-39-1
Price
US $30.00/kg
Min. Order
10kg
Purity
99.7%
Supply Ability
10000kg
Release date
2025-06-09
Anhuyan (Hainan) Biotechnology Co., LTD
Product
2-Mercaptobenzimidazole 583-39-1
Price
US $0.00/G/KG
Min. Order
1G/KG
Purity
99%
Supply Ability
10000000KG
Release date
2025-04-22
WUHAN FORTUNA CHEMICAL CO., LTD
Product
2-Mercaptobenzimidazole 583-39-1
Price
US $0.00/Kg/Drum
Min. Order
1KG
Purity
99%min
Supply Ability
10 tons
Release date
2021-08-09

583-39-1, 2-MercaptobenzimidazoleRelated Search:

Benzimidazole 2-Chlorobenzimidazole Dioctyldiphenylamine Styrenated phenol Sodium thiomethoxide N-(2-Naphthyl)aniline Phenformin 2-Hydroxybenzimidazole 2-Methylbenzimidazole 2-Chloromethylbenzimidazole N-(1,3-Dimethylbutyl)-N'-phenyl-p-phenylenediamine Poly(1,2-dihydro-2,2,4-trimethylquinoline) 1,2-Ethanedithiol tert-dodecylthiol 2-Aminobenzimidazole 5-Nitrobenzimidazole N-Cyclohexyl-N'-phenyl-p-phenylenediamine 2-GUANIDINOBENZIMIDAZOLE

  • 2-Mercaptobenzimidazole Joyce
  • Rabeprazolesodium EP Impurity F
  • Rabeprazole Mercapto Impurity 2
  • Rabeprazole-1
  • 2,3-dihydrobenzimidazol-2-thione
  • Rabeprazole Impurity 33（Rabeprazole EP Impurity F）
  • 1,3-dihydro-2h-benzimidazole-2-thion
  • 1,3-Dihydro-2H-benzimidazole-2-thione
  • 1,3-Dihydro-benzoimidazole-2-thione
  • 1H-Benzimidazol-2-yl hydrosulfide
  • 2,3-Dihydro-1H-benzimidazole-2-thiol
  • 2-Benzimidazolethione
  • 2-Benzimidazolinethione
  • 2-benzimidazolinthion
  • 2H-Benzimidazole-2-thione, 1,3-dihydro-
  • 2H-Benzimidazole-2-thione,1,3-dihydro-
  • 2-Mercaptobenzoimidazole
  • usafek-6540
  • usafxf-21
  • Vulkanox MB
  • Vulkanox MBI
  • 2-Mercaptobenzimidazole≥ 99.5%
  • 2-Benzimidazolethiol 1H-Benzo[d]imidazole-2-thiol 1,3-dihydro-2H-Benzimidazole-2-thione Antioxidant MB 2-benzimidazolinthion
  • 2-Mercaptobenzimidaz
  • 2-Mercapto benzanidazole
  • 2-MercaptobenziMidazole, 98% 100GR
  • 2-MercaptobenziMidazole, 98% 250GR
  • 2-MercaptobenziMidazole, 98% 5GR
  • 2-Mercapto-1H-benziMidazole
  • o-Phenyleneth
  • Sandant MB
  • SuMilizer MB
  • Vulkanox
  • Lansoprazole related substance E
  • 2-Mercapto beziMidazole
  • Antiager MB
  • Rabeprazole Mercapto Impurity
  • Rabeprazole USP RC C
  • 2-Mercaptobenzimidazole583-39-1
  • Lansoprazole Impurity 5(Lansoprazole EP Impurity E)
  • 2-Mercaptobenzimidazole(2MBI)
  • 1H-BenziMidazol-2-thiol
  • Lansoprazole EP IMpurity E
  • 1H-benzo[d]iMidazole-2(3H)-thione
  • 2-Mercapto-1H-benzimidazole, 2-Sulphanyl-1H-benzimidazole
  • Rabeprazole Related CoMpound C
  • 2-MercaptobenziMidazole, 98.0%(T)
  • 2 - Mercapto benzene and iMidazole
  • 2-Mercaptobenzimidazole, MBI
  • 2-merkaptobenzimidazol
  • 2-Thiobenzimidazole
  • 2-Thiol benzimidazole
  • Anitiegene MB
  • Antiegene MB
  • antiegenemb
  • Antigen MB
  • Antigene MB
  • Antioxidant mb