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;
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.
