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Description Reference
2-Mercaptobenzimidazole structure
Chemical Name:
AOMB;asmmb;Asm MB;Vulkanox;usafxf-21;Nocrac MB;Sandant MB;Antigen MB;NCI-C56268;nci-c60980
Molecular Formula:
Formula Weight:
MOL File:

2-Mercaptobenzimidazole Properties

Melting point:
300-304 °C(lit.)
refractive index 
1.5500 (estimate)
Flash point:
storage temp. 
Refrigerator, Under Inert Atmosphere
White to beige
Water Solubility 
<0.1 g/100 mL at 23.5 ºC
Stable. Incompatible with strong oxidizing agents.
CAS DataBase Reference
583-39-1(CAS DataBase Reference)
NIST Chemistry Reference
EPA Substance Registry System
2H-Benzimidazole- 2-thione, 1,3-dihydro-(583-39-1)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
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
HazardClass  6.1
PackingGroup  III
HS Code  29339910
Toxicity LD50 orally in Rabbit: 300 mg/kg
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,P405, P501
H312 Harmful in contact with skin Acute toxicity,dermal Category 4 Warning P280,P302+P352, P312, P322, P363,P501
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H332 Harmful if inhaled Acute toxicity,inhalation Category 4 Warning P261, P271, P304+P340, P312
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P321 Specific treatment (see … on this label).
P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P405 Store locked up.

2-Mercaptobenzimidazole price More Price(12)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 51810 2-Mercaptobenzimidazole analytical standard 583-39-1 50mg $50.7 2018-11-20 Buy
Sigma-Aldrich 1598042 Rabeprazole Related Compound C United States Pharmacopeia (USP) Reference Standard 583-39-1 25mg $1220 2018-11-13 Buy
TCI Chemical B0055 2-Mercaptobenzimidazole >98.0%(HPLC)(T) 583-39-1 25g $14 2018-11-22 Buy
TCI Chemical B0055 2-Mercaptobenzimidazole >98.0%(HPLC)(T) 583-39-1 500g $68 2018-11-22 Buy
Alfa Aesar A18350 2-Mercaptobenzimidazole, 97% 583-39-1 500g $58.5 2018-11-13 Buy

2-Mercaptobenzimidazole Chemical Properties,Uses,Production


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.


  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.

Chemical Properties

yellow or white crystals


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

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.

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

Preparation Products

2-Mercaptobenzimidazole Suppliers

Global( 450)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Capot Chemical Co.,Ltd.
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Henan DaKen Chemical CO.,LTD.
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Chemson Industrial (Shanghai) Co., Ltd.
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View Lastest Price from 2-Mercaptobenzimidazole manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-12-23 2-Mercaptobenzimidazole
US $1.00 / kg 1kg 98%min as request career henan chemical co
2018-08-16 2-Mercaptobenzimidazole
US $11.00 / KG 1KG 99% 1000KG career henan chemical co
2018-04-24 Antiager MB; 2-Mercaptobenzimidazole
US $7.00 / KG 25KG 99.50% 1000tons Chemson Industrial (Shanghai) Co., Ltd.

2-Mercaptobenzimidazole Spectrum

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