Dosage of TDI – toluene diisocyanate

Toluene diisocyanate (TDI) is a highly reactive chemical compound belonging to the isocyanate family. It is primarily used as a monomer in the manufacture of flexible and rigid polyurethane foams, but also in coatings, glues, paints, and adhesives. Due to its toxicity and volatility, TDI is classified as a hazardous substance, with respiratory irritant and sensitizing effects.

Importance of dosage

TDI dosage is crucial because:

• It allows the regulatory compliance of materials intended to come into contact with consumers to be verified.
• It guarantees health safety by limiting the risks linked to residual TDI emissions.
• He participates in quality control and validation of industrial processes.
• It is essential in the context of compliance with REACH and CLP regulations, as well as for certain specific requirements for materials in contact with foodstuffs (MCDA).

Analytical methods

Since TDI is highly reactive, its analysis requires specific preparation, often by chemical derivatization. The main techniques used are:

• Gas chromatography coupled with mass spectrometry (GC-MS), providing high sensitivity to detect TDI at trace levels.
• High performance liquid chromatography (HPLC), suitable for certain complex matrices.

These methods allow for the precise measurement of the presence and concentration of TDI in a wide variety of media.

Analyzed matrices

TDI dosage can be performed on:

• Polyurethane foams.
• Various plastics and polymers.
• Industrial coatings (paints, varnishes).
• Adhesives, glues and construction products.

Industrial applications

TDI control is essential for:

• Manufacturers of polyurethane foams for furniture, bedding, insulation or automobiles.
• The coatings and adhesives industry, to check for the absence of volatile residues.
• The food contact materials sector, to prevent any unwanted migration.
• Plastic recycling stakeholders, who must ensure the absence of dangerous contaminants.

Related analyses in the YesWeLab catalog

The TDI dosage can be supplemented by other regulatory analyses:

• Dosage of MDI (Diphenylmethane Diisocyanate)
• Monomer dosage
• Dosage of NIAS (Non-Intentionally Added Substances)
• NOGE (Nonylphenol Glycidyl Ether) Dosage
• Phthalate dosage

YesWeLab Expertise

At YesWeLab, we work with a network of carefully selected partner laboratories, most of which are ISO 17025 certified and COFRAC accredited. We assist you in choosing the analytical methods best suited to your needs, matrices, and regulatory constraints. Our goal is to guarantee reliable and usable results for your compliance and quality control processes.