Naphthol reagent

Procedure. Prepare the 2-nitroso-l-naphthol reagent by dissolving 1.0 g of the solid in 100 mL of glacial acetic acid. Add 1 g of activated carbon shake the solution before use and filter off the required volume. 

The specific detection of aromatic nitro compounds is a second example. These can be converted by reduction to primary amines, which are then diazotized and coupled to yield azo dyes (cf. reagent sequence Titanium(III) chloride — Bratton-Marshall reagent ). Sodium nitrite —naphthol reagent, diazotized sulfanilic acid and other reagents specific for amino groups (e.g. ninhydrin, fluorescamine, DOOB, NBD chloride [9]) can also be used in the second stage of the reaction (Fig. 21). 

Basic violet 10 , 1-Nitroso-2-naphthol reagent, cobalt separation from chioride media Bis (2,4,4,-trimethylpentyl) phosphinic acid reagent, cobalt separation from sulfate media Bis (2,4,4,-trimethylpentyl) phosphinic acid reagent, cold permanent hair waves/strai g hteners Ammonium thioglycolate reagent, colored aluminum anodizing Maleic acid p-Phenol sulfonic acid 5-Sulfosalicylic acid reagent, colorimetric iron 5-Sulfosalicylic acid 5-Sulfosalicylic acid dihydrate... 

---