Dimethylaminobenzaldehyde Solution R6

Dimethylaminobenzaldehyde Solution R6 Dissolve 0.125 g of 4-dimethylaminobenzaldehyde in a cooled mixture of 65 mL of sulfuric acid and 35 mL of water and add 0.1 mL of a 5% w/v solution of iron(iii) chloride hexahydrate. Allow to stand for 24 hours, protected from light, before use.

When stored at room temperature, it must be used within 1 week; when kept in a refrigerator, it may be stored for several months.