MBI
2-Mercaptobenzimidazole
CAS: 583-39-1
Molecular Formula: C7H6N2S
MBI - Names and Identifiers
MBI - Physico-chemical Properties
| Molecular Formula | C7H6N2S |
| Molar Mass | 150.2 |
| Density | 1.339g/cm3 |
| Melting Point | 301-305℃ |
| Boling Point | 290.412°C at 760 mmHg |
| Flash Point | 129.437°C |
| Water Solubility | <0.1 g/100 mL at 23.5℃ |
| Solubility | Soluble in ethanol, acetone, ethyl acetate, insoluble in dichloromethane, chloroform, benzene, ether and gasoline, insoluble in water |
| Vapor Presure | 0.002mmHg at 25°C |
| Appearance | Milky white colored powder |
| Storage Condition | RT, sealed |
| Refractive Index | 1.714 |
| MDL | MFCD00466107 |
| Physical and Chemical Properties | Pure white or light yellow powder Crystal, non-toxic, bitter, relative density 1.40-1.44, melting point of not less than 285 ℃, soluble in ether, acetone and ethyl acetate, insoluble in petroleum ether, dichloromethane, insoluble in carbon tetrachloride, benzene and water. |
| Use | Uses: antioxidant MB in the rubber industry is the main non-polluting antioxidant, can reduce the discoloration of rubber vulcanization. This product is suitable for the manufacture of transparent, white and bright color products, heat-resistant and foam products, this product does not change color, not contaminated. |
MBI - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R22 - Harmful if swallowed |
| Safety Description | S24/25 - Avoid contact with skin and eyes. |
MBI - Upstream Downstream Industry
| Raw Materials | Carbon disulfide Sodium sulfide |
MBI - Introduction
Used as a sensitive reagent and rubber accelerator for the determination of gold, bismuth, cadmium, cobalt, mercury, nickel, lead, thallium and zinc.
Last Update：2022-10-16 17:26:38
MBI - Production method
synthesis of 1.3-propane sulfonolactone 215 kg of allyl alcohol and 275 kg (63%) sulfuric acid are put into a mixing kettle and stirred and mixed evenly for later use. In addition, 1,200kg of sodium sulfite and 1,800kg of water are put into a reaction kettle, and the pH value is adjusted to 6.5 with 50% sulfuric acid after heating and dissolving. The temperature is controlled at 50 ℃, and the pre-mixed spare liquid is added dropwise while stirring. During the dropping process, keep the temperature at 50 ℃, and stir for 20 min after dropping. Heat to concentrate, cool to crystallize by-products, and filter to remove. The solution is concentrated and cooled again, and the by-products are removed by crystallization to obtain 1, 3-propane sulfonolactone.
Synthesis of 3,3 '-Sodium Dithiodipropanesulfonate Add 900 kg of boiling water, 890 kg of sodium sulfide and 116 kg of sulfur in the reaction kettle, stir and dissolve. Then add 40% 430 kg of sodium hydroxide, more sodium sulfide solution. The prepared sodium polysulfide solution was cooled to below 5°C, and 1, 3-propanolactone was slowly added under stirring. After dropping, naturally heat up to room temperature, and then acidify with hydrochloric acid until Congo red test paper appears red. Cooling crystallization gives 3,3 '-disulfide dipropane sulfonic acid. Filtration, the filter cake is added to the neutralization kettle, azeotropic with the sodium carbonate solution, and then filtered to remove unreacted sulfur, concentrate the filtrate, cool, crystallize, filter, and dry to obtain the finished product.
Last Update：2024-04-10 22:29:15
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Multiple SpecificationsSpot supply
Product Name: Lansoprazole Impurity 5（Lansoprazole EP Impurity E） Visit Supplier Webpage Request for quotationCAS: 583-39-1
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Product Name: 2-Mercaptobenzimidazole Request for quotation
CAS: 583-39-1
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CAS: 583-39-1
Tel: 0086-551-65418684
Email: sales@tnjchem.com
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View History
Raw Materials for MBI