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Document ID (ISN)33521
CIS number 80-998
ISSN - Serial title Gigiena truda i professional'nye zabolevanija
Year 1979
Convention or series no.
Author(s) Lipina T.G., Tubina A.Ja., Kunilova L.V.
Title Determination of tolylene diisocyanate and 4,4'-diphenylmethane diisocyanate in air
Original title Opredelenie toluilendiizocianata i 4,4'-difenilmetandiizocianata v vozduhe [in Russian]
Bibliographic information Aug. 1979, No.8, p.55-56. 7 ref.
Abstract 2 photocolorimetric methods are described. 4,4'-Diphenylmethane diisocyanate reacts by condensation with p-dimethylaminobenzaldehyde (DABA) in the presence of acetic acid. Sensitivity is 0.25µg/4ml solution. Detection limit is 0.04mg/m3. 2,4-Tolylene diisocyanate also reacts with DABA. Sensitivity is 0.5µg/4ml; detection limit 0.025mg/m3. Chlorobenzene, phosgene, ammonia and biphenyl vapours do not interfere. The diisocyanates can be determined separately.
Descriptors (primary) diphenylmethane diisocyanate; determination in air; tolylene diisocyanate
Descriptors (secondary) 2,4-tolylene diisocyanate; colorimetry; description of technique
Document type D - Periodical articles
Subject(s) Toxic and dangerous substances
Broad subject area(s)
Browse category(ies) Isocyanates
Cyano compounds