Skip to Content
Merck
All Photos(1)

Key Documents

8.08264

Sigma-Aldrich

Toluylene diisocyanate

(mixture of isomeres) for synthesis

Synonym(s):

Toluylene diisocyanate, 4-Methyl-m-phenylene diisocyanate, TDI

Sign Into View Organizational & Contract Pricing


About This Item

Linear Formula:
(NCO)2C6H3CH3
CAS Number:
Molecular Weight:
174.16
UNSPSC Code:
12352118
EC Index Number:
247-722-4
NACRES:
NA.22

Pricing and availability is not currently available.

vapor pressure

0.03 hPa ( 20 °C)

Quality Level

form

liquid

autoignition temp.

620 °C

potency

4130 mg/kg LD50, oral (Rat)
>12200 mg/kg LD50, skin (Rabbit)

expl. lim.

0.9-9.5 % (v/v)

bp

247 °C/1013 hPa

mp

12-14 °C

transition temp

flash point 132 °C

density

1.22 g/cm3 at 20 °C

Compare Similar Items

View Full Comparison

Show Differences

1 of 4

This Item
8.207978.220668.18586
density

1.22 g/cm3 at 20 °C

density

1.239 g/cm3 at 20 °C

density

1.05 g/cm3 at 25 °C

density

1.06 g/cm3 at 20 °C

form

liquid

form

liquid

form

liquid

form

liquid

mp

12-14 °C

mp

10 °C

mp

-67 °C

mp

-60 °C

storage temp.

2-30°C

storage temp.

2-30°C

storage temp.

2-30°C

storage temp.

2-30°C

bp

247 °C/1013 hPa

bp

196 °C/7 hPa

bp

255 °C/1013 hPa

bp

158-159 °C/13 hPa

Application


  • Preparation and properties of toluene-diisocyanate-trimer-modified epoxy resin: Discusses the enhancement of epoxy resin properties through the self-polymerization of TDI, aiming to improve performance in industrial applications (X Zhang, L Qiao, X Lu, L Jiang, T Cao, 2019).

  • A simple method for the quantification of free isocyanates on the surface of cellulose nanocrystals: This research focuses on the carbamation of cellulose using TDI, which is critical for the modification and enhancement of nanocellulose surfaces for various applications (H Abushammala, 2019).

  • Fluorescent linear polyurea based on toluene diisocyanate: Reports the preparation of a TDI-based polyurea that exhibits broad emission spectra, suggesting potential uses in sensor applications and material science (H Cao, B Li, X Jiang, X Zhu, XZ Kong, 2020).

Analysis Note

Assay isomers (GC, area%): ≥ 98.0 % (a/a)
Assay Toluylene-2,6-diisocyanate (NMR): 10.0 - 30.0 % (a/a)
Assay Toluylene-2,4-diisocyanate (NMR): 70.0 - 90.0 % (a/a)
Density (d 20 °C/ 4 °C): 1.218 - 1.222
Identity (IR): passes test
Due to its specific melting range the product may be solid, liquid, a solidified melt or a supercooled melt.

Pictograms

Skull and crossbonesHealth hazard

Signal Word

Danger

Hazard Classifications

Acute Tox. 1 Inhalation - Aquatic Chronic 3 - Carc. 2 - Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - Skin Sens. 1A - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

6.1A - Combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 2

Flash Point(F)

269.6 °F - closed cup

Flash Point(C)

132 °C - closed cup


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service