CAUTION: Whistle compositions have a very high rate of burning and are considered explosive. Extreme caution must be exercised when preparing whistle compositions.

DANGER: Potassium chlorate and gallic acid mixes are highly sensitive to mechanical action, and can ignite when loading. Use of such mixtures is strongly discouraged.

DANGER: Chlorate whistle compositions are sensitive to mechanical action. Use of such mixtures is discouraged.