Trimethylamine (TMA, CAS 75-50-3) is a small, volatile amine with a supply-chain role that reaches well beyond its molecular size. For buyers evaluating it as a feedstock for choline chloride, the first useful question is not simply “What is the price?” It is “Which supply form, concentration and receiving setup match our process?”

First, separate the feedstock from the downstream product

TMA is used as a reactant in certain choline chloride manufacturing processes. Choline chloride is a downstream chemical in its own right; it is not another name for TMA. It is also used in animal nutrition and other applications, but an enquiry for TMA concerns an upstream raw material, with its own specification, handling and logistics requirements. The specific process route and product grade depend on the manufacturer and application.

This distinction sounds obvious until a purchasing brief mixes the raw material, the intermediate and the finished product in one line. A clear material name and CAS number at the start can save several rounds of “just to confirm…” emails later.

Two common supply forms, two different planning questions

Anhydrous trimethylamine

Anhydrous TMA is supplied as a liquefied gas. Buyers should confirm the required purity, packaging and the receiving site's ability to handle the specified container and material. For bulk movement, China Amines lists T50 ISO tank packaging for anhydrous TMA on its product page. Actual availability, shipment timing and carrier or terminal acceptance should be checked for each order.

TMA 30% aqueous solution

A 30% solution can fit a different operating and logistics setup from anhydrous TMA. Confirm how concentration is expressed, the required assay tolerance, and the package compatible with your storage and unloading system. China Amines lists drums, ISO tanks and tank-truck options for the solution; the practical choice depends on order size, destination infrastructure and local transport rules.

When comparing offers, compare equivalent material bases. A tonne of 30% solution is not a tonne of neat TMA: water is part of the shipped mass. Buyers often find it useful to compare delivered cost per tonne of active TMA alongside the total delivered cost, while keeping specification and handling requirements consistent.

What should a TMA specification review cover?

Start with the current product specification and certificate of analysis (COA), rather than relying on a product name alone. Review the assay basis and the limits relevant to your process. Where impurities or water content matter, state the acceptance limits explicitly and confirm the analytical methods and reporting basis with the supplier. A typical specification is not a substitute for the buyer's process-specific requirements.

Before shipment, align the SDS, package type, quantity, destination, requested shipping window and unloading capability. TMA is volatile and requires appropriate controls. The buyer and supplier should review the current SDS and confirm applicable transport, carrier, terminal and site requirements for the exact form and route; acceptance should never be assumed from a previous shipment to a different destination.

A practical RFQ checklist

• Material: anhydrous TMA or TMA 30% aqueous solution
• Required grade, concentration basis and key acceptance limits
• Quantity per shipment and expected annual demand
• Preferred packaging and receiving or unloading capability
• Destination port or delivery point and target shipment window
• Requested documents, such as current COA, TDS and SDS

Providing these details up front helps a supplier assess the right product form and logistics plan, instead of sending a quote that looks tidy but cannot be received at the plant.

Planning a TMA supply enquiry with China Amines

China Amines Co., Limited supplies trimethylamine in anhydrous and 30% aqueous forms, with packaging options listed for each on the TMA product page. For a quotation or technical discussion, specify the form, concentration or grade, quantity, packaging, destination and timing. The team can then review the relevant documentation and shipment feasibility against the receiving requirements.

In brief: match the TMA form to the process and receiving setup; keep the raw material distinct from downstream choline chloride; and make the RFQ specific enough that both sides are pricing the same thing.

Sources and further reading

• NIOSH Pocket Guide: Trimethylamine (chemical identity and occupational safety information)
• Celanese: Trimethylamine (downstream uses, including choline chloride production)
• Johnson Matthey: Choline chloride process (process overview)
• China Amines: Trimethylamine product information (listed supply forms and packaging)