Industrial Denatured Alcohol (Ketone-free)
DEFINITION
Industrial Methylated Spirit (Ketone-free) is a mixture of nineteen volumes of ethanol of an appropriate strength with one volume of approved wood naphtha substantially free from ketones. Two strengths are available containing 99% by volume and 95% by volume of alcohol (also known as 74 OP and 66 OP respectively).
CHARACTERISTICS; IDENTIFICATION; TESTS
Acidity or alkalinity; Clarity of solution; Apparent density; Aldehydes; Non-volatile matter
Complies with the requirements stated under Industrial Methylated Spirit.
Ketones
Dilute 5 mL to 10 mL with water, add 1 mL of a 1.0% w/v solution of 2-nitrobenzaldehyde in ethanol (50%) followed by 1 mL of a 15% w/v solution of sodium hydroxide in water and allow to stand for 15 minutes. Any colour produced is not more intense than that produced by treating in the same manner 10 mL of a 0.025% v/v solution of acetone in ethanol (50%) (500 ppm).
