| Chemical properties | It appears as colorless or white odorless crystal with sour taste. No optical rotation. It will undergo melting and decomposition at about 280 °C. It is insoluble in water, ethanol and ether. It belongs to a non-essential amino acid. |
| Content analysis | Accurately weigh 200 rag of the sample and dissolve it in the mixture of 3 ml formic acid and 50ml glacial acetic acid with adding 2 drops of crystal violet test solution (TS-74). Add 0.1mol/L perchloric acid for titration to the green end point, or until the blue color is totally disappeared. Per mL of 0.1mol/L perchloric acid is equivalent to 13.31 mg of C4H7NO4. |
| Application |
- Nutritional supplements;
- Used as biochemical reagents, organic synthesis intermediates and metal complexing agent;
- For amino acid infusion, synthetic drugs, can be used for the treatment of liver disease and heart disease, as well as for cosmetics;
- Used for biochemical research;
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| Preparation | To synthesize it, maleic acid ketone is first reacted with benzylamine, followed by acetone precipitation and ethanol crystallization; further apply ether extraction, acidification and hydration; refine to obtain the final product. |
| Usage limits | It can account for 7.0% of the total protein amount in food (including I, asparagine; FDA $ 172.320, 2000). |
| Category | toxic substances |
| Toxicity | It can be safely used for food (FDA§172.320, 2000). |
| Acute toxicity | peritoneal – rat LD50> 6000 mg/kg |
| Flammability and Hazardous characteristics | It is flammable with combustion producing toxic nitrogen oxides |
| Storage and transportation characteristics | ventilated, low temperature and dry |
| Fire extinguishing agent | dry powder, foam, sand, carbon dioxide, mist water. |