By reading this application note, you will learn how to determine the total p-tertiary-butyl catechol (TBC) content in styrene and α-methyl styrene using METTLER TOLEDO's EasyPlus UV/VIS spectrophotometers.
Why Is TBC in Styrene and α-Methyl Styrene Important?
Polymer inhibitor is added to prevent auto-polymerization of monomers such as a styrene monomer. p-tertiary-butyl catechol (TBC) is commonly used as a polymer inhibitor. It is added to styrene for protection against polymerization in transit and storage, as well as for internal quality control. TBC shows melanocytotoxic effects and contact with skin may lead to occupational leucoderma or vitiligo. Therefore, it is necessary to determine TBC in styrene and α-methyl styrene on both the producer and consumer end to determine that its concentration is within permissible limits.
How Is the Total TBC Content in Styrene and α-Methyl Styrene Determined?
In this method, TBC forms a pink color with sodium hydroxide in an alcoholic solution, which gives a maximum absorption at 490 nm. The absorbance of the formed pink-colored complex is determined at 490 nm. This method is analogous to the ASTM D4590 method.
This application note includes:
- Sample preparation and procedures
- Chemistry
- Solutions and chemicals
- Instruments and accessories
- Results and discussion
- Remarks
Download our free application note to learn more about determining the total p-tertiary-butyl catechol content in styrene and α-methyl styrene using METTLER TOLEDO's EasyPlus UV/VIS spectrophotometers.
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