Hydroxylamine Solution, Alcoholic

Dissolve 3.5 g of hydroxylamine hydrochloride in 95 mL of ethanol (60%), add 0.5 mL of a 0.2% w/v solution of methyl orange in ethanol (60%) and sufficient 0.5m potassium hydroxide in ethanol (60%) to give a pure yellow colour. Dilute to 100 mL with ethanol (60%).