Rouge originated from

When Huns marry women, they must pick their flowers, squeeze their juice and make them coagulate fat as ornaments. Later, Yan Zhicai wrote Yan Zhi and Rouge.

China's "Hygienic Standard for the Use of Food Additives" (GB 2760- 1996) stipulates that it can be used for juice drinks, carbonated drinks, mixed wine, sweets, cakes, green plums, hawthorn products and pickled side dishes, and the maximum dosage is 0.05g/kg.

The maximum dosage of canned red and green silk and dyed cherry is 0- 10g/kg, and the maximum dosage of soybean milk beverage, sausage puffed food and jelly is 0.025g/kg；; ; Used for shrimp slices, ice cream, ice cream, popsicle, ultra-high temperature sterilized flavored milk and flavored yogurt, the maximum dosage is 0.05 g/kg; Used for candy coating, 0.10g/kg; Flavor milk powder, 0. 1.5g/kg.

(1) Take 0. 1g of this product and dissolve it in 100ml of water, showing a red clear solution.

(2) This product is slightly soluble in ethanol and insoluble in oil. It has the characteristics of acid dyes and can be used to color animal fibers.

(3) 100ml of 0.02mol/l ammonium acetate solution containing 0.00 1g of this product has a maximum absorption wavelength of 508±2nm.

(4) Take the aqueous solution of this product for paper chromatography, and the Rf value of the main color point should be the same as that of the standard.

Paper chromatographic conditions:

Developing agent n-butanol: anhydrous ethanol: ammonia water (1%)=6:2:3.