Hard fat suppository base that provides excellent chemical stability with acidic APIs and high crystallization rate. A versatile base with precedence of use with a wide range of APIs.

Names & synonyms

USP NF Name

Hard fat

EP Name

Hard fat

UNII Code (FDA)

8334LX7S21

Preferred Substance Name (FDA)

Fat, hard

Handbook of Pharmaceutical Excipients

Suppository bases, hard fat

Chemical description

Consists of mono-, di- and triglyceride esters of fatty acids (C10 to C18), the triester fraction being predominant

Key characteristics

Product form

Pellets

Melting range (°C)

34 - 36

Hydroxyl value (mg KOH/g)

<10

suppocire am thermorheogram

Main functionalities

Versatile base for straightforward formulations recommended for acidic APIs.

Main formulation technologies

Suppository molding.

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