Mixtures of the invention were produced by reaction of succinic acid with the corresponding alkyl and benzyl alcohols. The results of performance testing for examples 1 to 7 are shown in Table 1.The glass beaker was placed on a magnetic heater-stirrer in a holder between a lamp and a photocell. The change in light transmittance of the sample was recorded by way of a photocell. 2 g of polyvinyl chloride (Vinnolit® S4170; Vinnolit GmbH & Co. KG, Germany), and, by means of a pipette, 2 drops of PVC stabilizer (organotin stabilizer) were then added. The polyvinyl chloride was stirred into the plasticizer and the mixture was heated rapidly at from 5-8° C. per minute to 100° C., with stirring, and then further heated at an average of 3° C. per minute.

Solvation temperature was considered to have been reached when for 3 successive minutes no further rise in the transmittance value was recorded by the photocell, and the polyvinyl chloride had been dissolved. Measurement was terminated when the temperature of the contents of the glass beaker reached 200° C. Low solvation temperature indicates good compatibility of the plasticizer and of the plasticizer preparations with polyvinyl chloride and indicates that high-speed processing is possible.A powerful anti oxidant that helps fight toxic free radicals and disruptions of the cardiac rhythm, succinic acid has been shown to stimulate neural system recovery and bolster the immune system, and helps compensate for energy drain in the body and brain, boosting awareness, concentration and reflexes, and reducing stress.