Deuterium-enriched aldehydes

A composition, comprising:

• a deuterium-enriched aldehyde of structure 1:
• wherein:
• there are at least 6×1018 molecules of the aldehyde in the composition;
• Rx is hydrogen, wherein the deuterium isotope is present in an amount greater than 0.10% of the Rx hydrogen atoms;
• R1, R2 and R3 are independently selected from hydrogen, alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, heteroalkyl, substituted heteroalkyl, aryl, substituted aryl, heteroaryl, and substituted heteroaryl;
• alternatively, the CR1R2R3 moiety forms a group selected from:
• an aryl, substituted aryl, heteroaryl, and substituted heteroaryl;
• alternatively, the CR1R2 moiety forms a group a group selected from:
• an alkenyl and substituted alkenyl;
• alternatively, the CR1R2R3 moiety forms a group a group selected from:
• an alkynyl and substituted alkynyl;
• and,
• optionally, the aldehyde is substituted with C(O)Ry, wherein Ry is hydrogen, wherein the deuterium isotope is optionally present in an amount greater than 0.10% of the Ry hydrogen atoms, provided that Rx is optionally H when the deuterium isotope is present in an amount greater than 0.10% of the Ry hydrogen atoms.