English name: PABA; p-Aminobenzoic acid; 4-Aminobenzoic acid; Vitamin Bx; Vitamin H1 Other names: 4-aminobenzoic acid; p-acid Level: AR Content: ≥99.5% Sulfate: ≤0.01% Chloride: ≤0.01% Melting point: 186.5 ～ 188.5 ℃ Sodium carbonate dissolution test: qualified Iron: ≤0.002% Heavy metals: ≤0.001% Residue on ignition: ≤0.03% Properties: white monoclinic prism crystal. Light yellow in exposed air and light. Soluble in boiling water, soluble in alcohol, ether, ethyl acetate and glacial acetic acid, slightly soluble in water and benzene, insoluble in petroleum ether. The pH value of the 0.5% solution is 3.5. The lethal dose (mice, oral) was 2850 mg / kg. Irritating. Solubility: 4.7 g / L water (20 ° C), 121 g / L ethanol, 1g / 50ml ether. Relative density: 1.374. It is one of the constituents of folic acid, a substance necessary for the growth and division of cells in the body. It is very high in yeast, liver, bran and malt. Uses: biochemical research. Used as a reagent for the determination of copper. Used for synthesis and storage of esters, folic acid and azo dyes: RT, protected from light Triple Rotors Watch Winder, can hold more than 6 watches, suitable for both man and women. Our products are all made of wood and exquisite workmanship. Double automatic watch winder can rotates clockwise, counter-clockwise or alternate it will work with all kind of automatic watches. his automatic watch winder will keep your automatic timepieces wound and ready to wear when you need them. This product also can wind up three automatic watches, or more than three, and this watch winder with Japanese mabuchi rotor, it's very quiet. It would not disturb your sweet dream even you put it in your bedroom. This product has high quality, high sales volume and low price in our company. Watch Winder For More Than Six Watches 3D Printed Watch Winder,Watch Winder Jewelry Box,Diy Automatic Watch Winder,Watch Winder Display Case GUANGZHOU T.WING-PAK MFG.CO.,LTD , https://www.watch-winder-factory.com
CAS number: 150-13-0
C7H7NO2 = 137.14