In this passage, the quotation is well-introduced. The author of the quotation is identified, as is the quotation's relation to the previous statement. From the introduction, the reader can detect the contrast between the quotation and the first sentence of the paragraph. Achieving Variety when Introducing Quotations.
(also cinnamic aldehyde, Î²-phenylacrolein), C 6 H 5 CH=CHCHO, a fatty-aromatic unsaturated aldehyde; a colorless liquid with the characteristic odor of cinnamon. It has a boiling point of 252Â°C and a density of 1.110 g/cm 3 (at 20Â°C). It is poorly soluble in water and very soluble in alcohol and ether. Cinnamaldehyde is a component of many essential oils (cinnamon oil and others).
Formaldehyde has a pungent odor and is very soluble in water. Formaldehyde is highly reactive and readily combines. with many chemical compounds, and under normal conditions, it is a gas. In its simplest form, formaldehyde is a color-. less gas. But the term formaldehyde is sometimes used to describe liquids composed of various mixtures of formalde-. hyde, water, and alcohol.