| introduction | acetyl castor oil methyl ester is colorless to pale yellow transparent viscous liquid with a slight special smell. Insoluble in water, soluble in ethanol, ether, benzene, chloroform, petroleum ether and grease. The freezing point is below -40°C. Ricinoleic acid is present in castor oil in the form of glyceride (the content is about 90%). In the gum base, there is a cold-resistant plasticity, which can improve the shortcomings of polyvinyl acetate and other gum base ingredients at low temperatures such as brittleness, hard, and not easy to soften. |
| use | plasticizer and rubber softener for plastic films used in food packaging. It is also used as a chewing gum substrate as a food additive.
Gum Gum Gum Base Agent. The dosage in the gum base is generally 0.2% ~ 0.5%. |
| synthesis method | castor oil mixed fatty acid and acetone are added to the reaction kettle, stirred and dissolved and cooled to -29 ~-15 ℃, filtered to remove saturated acid, and then recrystallized at -70 ℃ to obtain ricinic acid. This product is obtained by esterifying ricinic acid and methanol, and then acetylation with acetic anhydride. |
| identification test | take 5g of sample, add 10ml of 20% potassium hydroxide ethanol solution, reflux heating in a water bath for about 2 hours, then carry out distillation, take 0.1 ml of initial distillation solution, add 0.1 ml of 5% phosphoric acid and ml of 5% potassium permanganate solution, place for 1min, add sodium bisulfite solution (TS-215) until the solution completely discolors, add 2ml of chromic acid test solution (TS-66), shake and mix, and heat on a 60 ℃ water bath for 10min. The solution should be purple. Take 10ml of the above distillation residual liquid, adjust the Ph value to 1-2 with dilute sulfuric acid, add 30ml of diethyl ether, shake well, take the ether layer, add about 2g of anhydrous sodium sulfate to dehydrate, filter, evaporate the diethyl ether in the filtrate, take a part, add three times the volume of ethanol, and dissolve; another part is heated with small fire, and the special smell of heptanal should occur. |
| content analysis | accurately weigh about 1g of the sample, put it into a 200ml flask, add 25ml of 0.5mol/L potassium hydroxide ethanol solution, install a reflux condenser, heat it on a water bath for about 2h 0, cool it, add 4 drops of phenolphthalein test solution (TS-l67), and titrate excess alkali with 0.5mol/L hydrochloric acid. The same blank test was conducted at the same time. 0.5mol/L potassium hydroxide ethanol solution per ml is equivalent to 88.63mg of methyl acetyl castor oleate (C21H38O4). |
| toxicity | LD50>50 g/kg (rat, oral). |
| chemical properties | colorless to pale yellow transparent viscous liquid with a slight special smell. Insoluble in water, soluble in ethanol, ether, benzene, chloroform, petroleum ether and grease. The freezing point is below -40°C. Ricinoleic acid is present in castor oil in the form of glyceride (the content is about 90%). In the gum base, there is a cold-resistant plasticity, which can improve the shortcomings of polyvinyl acetate and other gum base ingredients at low temperatures such as brittleness, hard, and not easy to soften. |
| production method | the mixed fatty acid of castor oil is dissolved in acetone, cooled to -20 ~-15 ℃ to remove saturated fatty acid, and then formed by acetylation and then methylation with anhydrous acetic acid after separation. |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
