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Terephthaloyl diisocyanate (TDI) is an organic compound widely used in the production of polyurethane foams, elastomers, and coatings. It is a colorless to pale yellow, toxic liquid with a strong, pungent odor. TDI is formed by the reaction of isophthalic acid with phosgene, resulting in a diisocyanate compound that contains two isocyanate functional groups. Due to its high reactivity, TDI is known to cause respiratory and skin irritation, and prolonged exposure can lead to more severe health issues. It is crucial to handle TDI with proper safety measures and personal protective equipment.

4418-78-4

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4418-78-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4418-78-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,4,1 and 8 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 4418-78:
(6*4)+(5*4)+(4*1)+(3*8)+(2*7)+(1*8)=94
94 % 10 = 4
So 4418-78-4 is a valid CAS Registry Number.

4418-78-4Relevant academic research and scientific papers

Polyacylurethanes based on diisocyanates and polyesterpolyols

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Page/Page column 7-8, (2010/09/05)

The present invention relates to a polyacylurethane having the following general formula (I) and a process for the preparation of such polyacylurethane. Preferred embodiments of the polyacylurethanes according to the invention have elastomeric properties. The polyacylurethanes can suitable be used in biodegradable, biocompatible and/or biomedical devices.

Process for the preparation of acyl isocyanates

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, (2008/06/13)

The invention concerns a process for the preparation of acyl isocyanates which consists of reacting oxalyl chloride with a salt selected from the group consisting of hydrohalides and sulphates of carboxamides and/or carbamates, unsubstituted on nitrogen, then heating the reaction mixture at a temperature between 30° and 150° C. The process is suitable for preparation of acyl isocyanates with excellent yields in easy to control operational conditions.

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