Black bean red
Physical and chemical properties
Black purple amorphous powder. It is easily soluble in water and ethanol solution, and the aqueous solution is transparent. Insoluble in absolute ethanol, acetone, ether, and grease. It is transparent and bright red in acidic aqueous solution; It is transparent reddish-brown in neutral aqueous solution; It is transparent and dark reddish-brown in alkaline aqueous solution. It turns brown in the presence of iron and leads to ions. Stable to heat. Strong light resistance under acidic conditions.
The seed coat of black soybean (glyeinesojasieb. Etzucc) was prepared by chemical method.
Toxicological basis
① LD50: the acute oral dose of mice is greater than 19g / kg (BW) (female and male).
② Micronucleus test: no mutagenic effect.
③ Subacute test: the mice were fed with the feed containing 1%, 3%, and 10% of this product, and no abnormality was found.
④ Aflatoxin B1 was not detected.
Application
Colorant.
GB 2760-2014 stipulates that it can be used for color packaging of candy and pastry and preparing wine, and the maximum dosage is 0.8g/kg; For fruit and vegetable juice (pulp) drinks and flavor drinks (only fruit drinks), the maximum dosage is 0.8g/kg (the dosage of solid drinks is increased according to the dilution multiple).
Other use references for black bean red are as follows: for candy and hard candy, the use amount is 0.04%; For soft candy, the dosage is 0.06%; It is used to prepare wine and wine, and the consumption is 0.08%; It is used for beverages and red bayberry soda, and the consumption is 0.05%; For cherry soda, the consumption is 0.08%; It is used for cola drinks, and the consumption is 0.068%.
Its aqueous solution turns brown in case of iron ions, so the interference of iron ions should be avoided during use; This product is bright red in acidic solution and is suitable for coloring acidic beverages.
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