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Because of the non-availability of polyoxypropylene glycols which contain "known" amounts of unsaturation, two polyoxyalkylene allyl ethers of average molecular weights 580 and 2340 were synthesized by NaOH catalyzed addition of either ethylene oxide (EtO) of mixture of ethylene oxide and propylene oxide (PrO) to allyl alcohol. Two-milliliter ali-quots of these reaction mixtures, which were not purified by water washing, vacuum stripping, etc., were hydrogenated with the results presented in Table IV.The fairly good agreement between the calculated and measured amounts of unsaturation in these four oxyalkylate samples is evidence for the validity of the CH3COOH-modified hydrogenation procedure even in the presence of NaOH catalyst and reaction by-products.

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