9756. Tristearin

Nomenclature

CAS number: 555-43-1
Octadecanoic acid 1,2,3-propanetriyl ester; stearin; glyceryl tristearate.
C57H110O6; mol wt 891.48.
C 76.79%, H 12.44%, O 10.77%.

Description and references

Present in many animal and vegetable fats, especially the hard ones like cacao butter and tallow. Prepd from stearic acid and glycerol in the presence of Al2O3: Ingram, GB 663566 (1951 to I.C.I.); by catalytic hydrogenation of many oils: Bailey's Industrial Oil and Fat Products (Wiley, New York, 3rd ed., 1964) pp 881-882.

Properties

White powder; d480 0.862; mp ≈55°; on further heating solidifies and melts again at 72°. nD80 1.4385. Insol in water. Sol in benzene, chloroform, hot alcohol; almost insol in cold alcohol, ether, petr ether.

Use

In textile sizes. Formerly in making candles.