Draeger Tube, Toluene Diisocyanate
Product ID: 6724501
Price: $197.95
Availability: Email for Availability (info@nafeco.com)
 
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Draeger Tube - Toluene Diisocyanate 0.02/A
Order No. 67 24 501

Application Range
Standard Measuring Range 0.02 to 0.2 ppm
Discoloration compared to color comparison tube.
Number of Strokes n: 25
Time for Measurement: approx. 20 minutes
Standard Deviation: ± 30%
Color Change: white to orange
   
Ambient Operating Conditions
Temperature: 15 to 30° C ~ 59 to 86° F
Absolute Humidity: < 20 mg H2O /L
   
Reaction Principle
a) Pyridylpyridinium chloride + NaOH → Glutaconaldehyde sodium oletate
b) 2,4-TDI (also for 2,6-TDI) + HCI → Aromatic amine
c) Aromatic amine + glutaconaldehyde → orange reaction product
 
Cross Sensitivity
Other isocyanates are not indicated.
No interference by:
5 ppm aniline
10 ppm benzylamine
5 ppm toluene
20 ppm benzene
Mercaptans also discolor the indicating layer.
 
Additional Information
Before carrying out the measurement the lower reagent ampoule must be broken and the liquid transferred to the indication layer, so that it changes color to yellow. Next, the upper reagent ampoule must be broken and the liquid transferred to the indication layer, so that it returns to a white color. After performing 25 pump strokes wait 15 minutes before evaluating the indication.

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