What is the composition of t-dodecyl mercaptan (TDM)?
TDM is a complex mixture of C₉-C₁₄ tertiary mercaptans focused primarily on C₁₂.

Which mercaptan is typically used as chain transfer agent for SBR?
TDM is typically used for SBR.

Which mercaptan is typically used for chain transfer in polystyrene?
TDM

Which mercaptan is used as a chain transfer agent for acrylates?
Normal dodecyl mercaptan is used with acrylates.

What materials of construction should be used with mercaptans?
Carbon steel is acceptable.

Does methyl mercaptan react with water?
Methyl mercaptan forms a solid hydrate with water.

What is the reaction between a mercaptan and steel?
An iron sulfide patina is produced. Iron sulfides are pyrophoric.

What are the impurities in methyl mercaptan?
Methyl mercaptan contains ppm levels of H₂S and < 0.1% of dimethyl sulfide(DMS).

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How should TGA be stored?
TGA should be kept in a cool area no hotter than 50ºF(10ºC). At higher temperatures, degradation will occur until an equilibrium of approx. 85% is reached. To maximize shelf life and purity, Arkema recommends storing TGA at 50ºF(10ºC).

What are some applications of TGA?

• To manufacture tin stabilizers for plastic additives
• Cosmetics: depilatory creams and hair care products
• Down-hole oil field corrosion inhibitor
• Chain transfer agent
• Depilatory agent for leather

Does Arkema make any TGA esters?
Yes. Arkema makes 2-ethyl hexyl mercaptoacetate (2-EHMA) and isooctyl mercaptoacetate (IOMA), both used to make PVC tin stabilizers.

What are some recommended materials of construction for TGA?
Storage tanks: Avoid the presence of iron. Polymeric materials are preferred over stainless steel. We recommend reinforced polypropylene.

What are the test methods for TGA?
Assay: Iodometry Iron content: TGA is neutralized by ammonia. Color comparison of results MCAA: Gas chromatography

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Do you have shelf life data for your thiochemical products?
No. We do not have shelf life data. Typically, we recommend testing a product for specifications 6 months after its manufacturing date.

Are your products kosher?
No animal products are used to manufacture any of our thio chemicals. Please contact our regulatory affairs dept at 800.628.4453 for further information.

I have more questions. How do I reach you?
Please contact us or call our toll free number: 800.628.4453.

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