| 21. | The picture on the right shows a fractured acetal joint in a water supply system.
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| 22. | Modern harpsichords frequently employ plectra made with plastic, specifically the plastic known as acetal.
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| 23. | The asymmetric diol is first treated with a tin reagent to produce the dibutylstannylene acetal.
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| 24. | It is the dimethyl acetal of formaldehyde.
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| 25. | Following the formation of the oxazolinium ion intermediate, water attacks the electrophillic acetal carbon.
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| 26. | A Dupont acetal polymer, Delrin was introduced as the D'Andrea Delrex line.
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| 27. | A polymer packing ring and a guide ring is attached with the Acetal guide bush.
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| 28. | This acetal is a principal flavour compound in sherry, and contributes fruitiness to the aroma.
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| 29. | To increase yields of ketals or acetals, water formed during the reaction can be removed.
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| 30. | Acetals are stable compared to hemiacetals but their formation is a reversible equilibrium as with esters.
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