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Product SKU: See ISO-CHEK Table

Product: ISO-CHEK

Simultaneous and Separate Collection of Isocyanate Phases


  • Accurately samples diisocyanates: HDI, MDI, IPDI, HMDI, 2,4-TDI, and 2,6-TDI
  • The only filter-based system that simultaneously traps and separates both monomers and oligomers
    - For better determinations of control strategies
  • Decreases sample preparation and analysis time by 40% compared to other methods
    - Pre-made calibration standards are available
  • Highly stable — minimizes storage and handling
  • Highly sensitive analysis provides detection limits below current regulated exposure levels
    - Ideal for occupational sampling and environmental surveys
    - Requires only a 15-minute sample time
  • Meets the specifications of several methods
    - ASTM D5932 for 2,4 and 2,6-TDI
    - ASTM D6561 for HDI
    - ASTM D6562 for HDI
  • Round-robin proficiency testing for ISO-CHEK labs ensures accurate, consistent analysis
    - See laboratory list at


Suitable for most isocyanates, the patented# ISO-CHEK® filter cassette employs a two-stage filter arrangement that results in the simultaneous collection and separation of vapor from aerosol at the point of collection. The filter that collects the vapor phase is treated with 9-(N-methyl-aminomethyl) anthracene (MAMA), a highly stable reagent that minimizes storage and handling requirements.



Cat. No.


ISO-CHECK Sampling System with Derivatizing Reagent†*, preloaded clear cassettes and jars of derivatizing solution (MOPIP in toluene) 225-9023
ISO-CHEK Sampling System*, preloaded clear cassettes for isocyanates,requires Derivatizing Solution; see below 225-9022



Cat. No.


Derivatizing Solution†*, 5 ml of MOPIP in toluene, in jars 225-9050 12
Jars, 37 mm with PTFE-lined cap 225-8377 36
Calibration Standard‡, MAMA-HDI, 1 gram 225-9053 ea
Calibration Standard‡, MAMA-HMDI, 1 gram 225-9056 ea
Calibration Standard‡, MAMA-IPDI, 1 gram 225-9054 ea
Calibration Standard‡, MAMA-MDI, 1 gram 225-9062 ea
Calibration Standard‡, MAMA-2,4-TDI and 2,6-TDI, 1 gram 225-9052 ea
Calibration Standard Set‡, HDI, MDI, IPDI, 2,4-TDI, 2,6-TDI, 1 gram each 225-9055 set
Packaging Kit, materials for shipping 10 packages of 10 samplers and jars 225-9059 ea
Packaging Kit, materials for shipping 20 packages of 4 samplers and jars 225-9063 ea

* Limited shelf-life

† Hazmat shipping charges for air shipments only, ground shipments exempt; not available for export

‡ Limited shelf-life, freezer storage recommended; refrigerated shipping not required

# U.S. Patent No. 4,961,916; see About at right



ISO-CHEK Developement

ISO-CHEK was developed and patented by IRSST (Institut de recherche Robert-Sauvé en santé et en sécurité du travail du Québec).


the ISO-CHEK Advatages

Simultaneous collection and separation of phases at the point of collection; Less time-consuming and more accurate analysis of each phase

Reagent is stable at room temperature.

15-minute sampling time Provides results that are more meaningful than those from the longer sampling times required by other methods

No handling precautions No broken glass or splashing impinger liquid

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