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Title: Alternative Sweeteners

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Trehalose 431<br />

Figure 4 Hygroscopicity of anhydrous and dihydrous trehalose. Trehalose was stored<br />

at various relative humidity concentrations for 7 days at 25°C and then measured for the<br />

percent moisture.<br />

anhydrous trehalose is 0.65%. The dihydrate form remained stable up to a relative<br />

humidity (RH) of approximately 92%. The moisture content of anhydrous trehalose<br />

increased as RH increased from 35–75% and then paralleled the moisture<br />

content of the dihydrate until 92% RH was reached. The maximum moisture<br />

content was nearly 14% (HBC, unpublished data, 1997). Table 1 provides com-<br />

Table 1 Water Absorption Ratio in Percent of Various Sugars Stored at<br />

90% Relative Humidity and 25°C for 10 Days<br />

Storage time in days<br />

Sugar 1.0 3.0 6.0 10.0<br />

Trehalose 0.2 0.0 0.1 0.2<br />

Lactose 0.2 0.3 0.3 0.7<br />

Maltose 3.5 6.6 8.4 8.4<br />

Glucose 4.0 7.7 10.8 11.3<br />

Sucrose 5.1 15.0 33.4 50.0

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