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CAS NO.547-58-0
Hot selling High purity 547-58-0 Methyl Orange with low price
Methyl orange is an orange powder or flake crystal, insoluble in ethanol, slightly soluble in water, easily soluble in hot water, and is composed of p-aminobenzene Sulfonic acid is coupled with N,N-dimethylaniline through diazotization reaction.
Methyl orange is used as an indicator for acid-base titration. 0.1% concentration is generally used (0.1 grams of methyl orange can be dissolved in 100 ml of hot water). It exists in the form of sulfonic acid in acidic solution. Because the sulfonic acid group can form an internal salt with the alkaline dimethylamino group in the molecule, a benzene ring is transformed into a quinone structure and becomes red. Methyl orange is yellow in the form of sodium sulfonate in neutral or alkaline solution, and the pH value in the color change range is 3.1~4.4.
preparation of Mo/carbonized resin catalyst: the D261 strong basic anion exchange resin is fully swollen, about 250ml is filled in an ion exchange column, activated, exchanged with dilute sulfuric acid solution to change it into sulfuric acid type, and then exchanged with 0.1mol/L ammonium molybdate solution at a speed of 1.5-2ml/min to change the resin into ammonium molybdate anion resin, and dried at 120 ℃, the dry resin is installed in a thick-diameter quartz tube sealed with Shi Ying cotton rope and Shi Ying cotton at both ends, carbonized under a nitrogen flow to make carbonized resin balls, cooled, and then the balls are put into a thin-diameter quartz tube sealed with Shi Ying cotton at both ends, reduced at a furnace temperature of 800 ℃ under a hydrogen flow, and replaced with nitrogen at a constant temperature of 1100 ℃ for more than 10h to cool down to obtain a new type.
Established in 2010, located in Hangzhou Qinglan science park, lingruichem is a technical company mainly focus on the Custom synthesis, manufacturing, sales of chemicals tovarious industries.n our R&D centre. we have a staff of skilled and experienced research chemists. This has enabled us to meet the special reauirements of our customers and it has enabled us to provide quality products at competitive prices.
1. How can we guarantee quality
Always a pre-production sample before mass production;
Always final Inspection before shipment;
2.What can you buy from us
Plant Extracts,Cosmetics Raw Materials,Vitamin Raw Materials,Pharmaceutical Raw Materials and Intermediates
3. Why should you buy from us not from other suppliers
Our company mainly devoted in producing pharmacetical intermediates , Vitamins , and health supplement , the quality and technical content can reach the advance level in China .Our products are sold well in China as well as in more than 20 countries.
Lingrui's credo is committed to your reliable business partner,reliable quality, competitive prices and superior service, lf you are interested in any of our products or would like to discuss a custom order, please feel free to contact us. We are looking forward to forming successful business relationships with new clients around the world in the near future !