Potassium benzoate CAS NO.582-25-2

CHENGDU YANXI is a comprehensive manufacturer and an international distribution of products throughout the world. Specialized in Scrap metal, Chemical raw materials, Paper products and color industry. We aim to become leading position in global distribution and trading based on a rather unique combination of technical skill, unrivalled supplier network, market knowledge and an absolute commitment to customer satisfaction.

 Our company Chengdu Yanxi import&export trading Co., Ltd , is founded with the registered fund of 10 millions RMB or USD 2 millions. Owing our own factory producing series of the medical raw materials and intermediates and the area of researching chemical reagents. Our aim is keeping alive with high quality, keeping development with reputation. Referring to our product,there is not only the advantage of the best competitive price in Europe and America,but also the advantage of high quality in Africa. The last two years, our products have been sold to more than 30 countries, including Europe,North America,South America, Southeast Asia, Africa, etc. So we are looking forward to cooperating with you as our friends for mutual development and prosperity.

Differential test: Benzoate test (IT-5) was positive. Or adding ferric chloride test solution (TS-101) to 10% sample solution, light yellow precipitation should be generated. Potassium test (IT-27) was positive. Or acidify 10% sample solution with dilute hydrochloric acid test solution (TS-117) and filter. Adjust the filtrate to neutral with sodium hydroxide test solution (TS-224), add 1 part (volume) saturated sodium bitartrate solution and 1 part (volume) ethanol, then shake. There should be white crystalline precipitate formation.

Content analysis: Sample pre-dried by 105% to constant weight 2.5-3G (accurate to 0.1mg), dissolved in 50ml water. After neutralization with 0.1mol/L hydrochloric acid [phenolphthalein test solution (TS-167) as an indicator]. Add 50ml of ether and several drops of bromophenol blue solution (TS-53), and titrate with 0.5mol/L hydrochloric acid under constant shaking until the color begins to change. Separate the lower water layer, wash the ether layer with 10ml water, and add the lotion and another 20ml ether into the separated water layer. Titrate with 0.5mol/L hydrochloric acid under constant shaking. Each ml0.5mol/L hydrochloric acid is equivalent to potassium benzoate (C7H5KO2)80.1lmg.