SKC OSHA/NIOSH/ASTM Sampling Guide for 2,4- TDI (toluene diisocyanate)

Chemical Hazard

2,4- TDI (toluene diisocyanate)

CAS. No.


Sampling Methodology


Sampling Parameters

Agency Standards (ppm)





240 L

1000 ml/min

4 hrs

C/STEL 0.02 (C)

15 L

1000 ml/min

15 hrs

Analytical Method


SKC Sampling Equipment

Coated Filter in Preloaded Cassette:225-9002 or

Coated Filter in Preloaded Cassette:225-9013 

Filter Cassette and Cyclone Holder:225-1 

Air Sampling Pump:220-5000TC 

Limit of Detection

0.18 ng/injection


OSHA 42 specifies a loading of 0.1 mg 1-(2-pyridyl) piperazine, however CF/CST 225-9002 and 225-9013 are also acceptable for this sampling method.
225-9002 loading of 1-(2-pyridyl) piperazine increased to 2 mg to increase stability and shelf life of filters.
225-9013 loading of 1-(2-pyridyl) piperazine is 1.0 mg
Freezer storage required for 225-9002 and 225-9013

This SKC Air Sampling guide is a reference only to assist users in finding the method, sampling equipment, and sampling media for a specific compound. This publication is intended for general information only and should not be used as a substitute for reviewing applicable government regulations, equipment operating instructions, or legal standards. Users must consult the appropriate sampling method for the compound of interest before sampling. The sampling parameters shown here are suggestions based on the ranges or volume, flow, and time specified in the methods. It is the responsibility of the analyst performing the sampling and analysis steps to adjust the parameters so that the required detection limits can be obtained. The information contained in this document should not be construed as legal advice or opinion nor as a final authority on legal or regulatory procedures.

View All Sampling Guides

a b c d e f g h i j k l m n o p q r s t u v w x y z