Coumarin/0.04 g. Low-Viscosity Carboxymethyl Cellulose/38.00 g. Glycerin/570.00 cc. 10% Benzalkonium Chloride/4.00 cc. Distilled Water/To make 3800.00 cc. Amaranth Solution, U.S.P./1.00 CC. 95% Alcohol/570.00 cc.
配制方法:
Heat 2655 cc. of the water to boiling and add the carboxymethylcellulose. Cool in a refrigerator. Dissolve the coumarin in the alcohol; add this to the benzalkonium chloride and amaranth solution. Combine the two solutions and mix well.