Evidence for the formation of a hydrate of 4,4'-diphenylmethane diisocyanate

Journal Article · Fri Mar 01 04:00:00 EST 1985 · Am. Ind. Hyg. Assoc. J.; (United States)

DOI:https://doi.org/10.1080/15298668591394554· OSTI ID:6962247

Gude'hn, A

To explain the differences obtained when sampling 4,4'-diphenylmethane diisocyanate (MDI) in industrial atmospheres, with solvent and solvent-free sampling techniques, as previously described, a complex MDI matrix was looked for. The dimer of DMI and MDI treated with water (compound X) were evaluated as possible candidates for the complex MDI matrix. The compound X was analyzed by high pressure liquid chromatography, infrared spectrometry, mass spectrometry, nuclear magnetic resonance, and differential scanning calorimetry. The melting point was also determined. Suggested from these experiments is that MDI forms a hydrate with water and that this hydrate might be the explanation for the ambiguous results obtained when sampling MDI by different techniques in the industrial atmosphere.

• Research Organization: Univ. of Umea, Sweden
• OSTI ID: 6962247
• Journal Information: Am. Ind. Hyg. Assoc. J.; (United States), Journal Name: Am. Ind. Hyg. Assoc. J.; (United States) Vol. 46:3; ISSN AIHAA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
570000 -- Health & Safety
99 GENERAL AND MISCELLANEOUS
ABSORPTION SPECTROSCOPY
CALORIMETRY
CHEMICAL REACTIONS
CHEMISORPTION
CHROMATOGRAPHY
DATA
DIMERS
EXPERIMENTAL DATA
HYDRATES
INFORMATION
ISOCYANATES
LIQUID COLUMN CHROMATOGRAPHY
MAGNETIC RESONANCE
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
OCCUPATIONAL SAFETY
ORGANIC COMPOUNDS
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SAFETY
SEPARATION PROCESSES
SORPTION
SPECTROSCOPY