Tomirac BSA (3,5-di-tert- butylsalicylic acid)is the main ingredient of charge control agents for toners.




Tomirac BSA

Chemical name 3,5- Di-tert-butylsalicylic acid
CAS number 19715-19-6
METI number 3-3034
Molecular formula C15H22O3
Molecular weight 250
Structural formula
Classification by functional group, compound Benzene ring, carboxyl group, carboxylic acid, hydroxyl group(phenolic hydroxyl group)
Melting point (°C) 159–166°C



Used as an ingredient in charge control agents of toners.

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Mitsubishi Chemical Corporation
Fine Chemicals Dept.

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