How to Buy TMTD: Specs, COA and Packing

Tetramethylthiuram disulfide (TMTD, CAS 137-26-8) is bought on specification, purity and reliable supply. This guide covers the parameters to confirm, the forms available, packaging, the paperwork to request and the regulatory points to check.

1. The specification to confirm

Property	Specification	Why it matters
Appearance	White or light-grey powder or granules	Visual acceptance; granules are lower-dust
Melting point	142 deg C min	Reflects purity; a low melting point signals contamination
Loss on heating	0.4% max	Controls moisture that affects the compound
Ash	0.3% max	Inorganic residues
Residue on 150 um sieve	0% (fully passing)	Fineness; a free-flowing, dust-controlled product

2. Powder or granules?

Form	Advantages	Considerations
Powder	Fast dispersion; lower price	Dustier; needs dust control
Granules	Lower dust, easier weighing, better flow	Check dispersion in your mixer

TMTD is a sensitizer, so the granule form is often preferred for a cleaner workplace. Confirm the form suits your mixing and dust-extraction setup.

3. Packaging and storage

Item	Detail
Packaging	25 kg PP/PE bags; 1000 kg jumbo bags; palletised for container shipment
Storage	Sealed, cool and dry, away from oxidising agents, acids and foodstuffs

4. Documents to request

Specification sheet – the guaranteed values.
Certificate of analysis (COA) per batch – melting point, loss on heating, ash and sieve residue.
Safety data sheet (SDS) – classification, handling and transport.
Third-party inspection (SGS/BV) on request.

5. Regulatory points to check

Industrial use – TMTD is used widely as a rubber accelerator and sulfur donor under the relevant chemical regulations.
Plant-protection use – the same molecule (thiram) is restricted or not approved as a pesticide in several regions. If you are buying for rubber, state that on the enquiry so the right documentation is supplied.
Classification – TMTD is a skin/respiratory sensitizer, harmful if swallowed or in contact with skin, an eye irritant and very toxic to aquatic life. Confirm the current labelling and transport classification on the SDS.

6. Supplier checklist

States melting point, loss on heating, ash and sieve residue in writing.
Offers powder or granules and the packaging you need.
Provides a per-batch COA and SDS.
Confirms the regulatory status for your market and application.
Quotes FOB or CIF to your port with lead time.

7. Getting the best terms

TMTD is a large-volume thiuram accelerator, and China is a major producer and exporter, which keeps supply broad and competitive. For repeat production, quote an annual or quarterly volume and align deliveries with consumption. Tell us the form, tonnage and delivery port for a quotation.

Frequently Asked Questions

What specification does TMTD come in?

Typically a melting point of 142 deg C min, loss on heating 0.4% max, ash 0.3% max and 0% sieve residue on 150 um, as white or light-grey powder or granules.

Is TMTD the same as thiram?

Yes – thiram is the common name for TMTD. As an industrial rubber chemical it is widely used; as a plant-protection product it is restricted in several regions.

What documents should I get with TMTD?

A specification sheet, a per-batch COA, the SDS, and third-party inspection on request.

How should TMTD be stored?

Sealed, cool and dry, away from oxidising agents, acids and foodstuffs.