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Chemical Sampling Information (CSI)
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General Description

Synonyms: HDIB; 1,6-Hexamethylene Diisocyanate Biuret; HDI Biuret; Biuret of Hexamethylenediisocyanate; Desmodur N

OSHA IMIS Code Number: D668

Chemical Abstracts Service (CAS) Registry Number: 4035-89-6

Other Chemical Abstracts Service (CAS) Registry Numbers: 11142-52-2

Chemical Description and Physical Properties:

thick liquid
molecular weight: 460.4
molecular formula: C23H38N6O5
density: 1.114(40/4)
melting point: -19°C

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Glass Fiber Filter (37 mm open face) coated with 1.0 mg 1-(2-pyridyl)piperazine
    analytical solvent: 90/10 (v/v) Acetonitrile/Dimethylsulfoxide
    maximum volume: 15 Liters
    maximum flow rate: 1.0 L/min
    current analytical method: High Performance Liquid Chromatography; HPLC/UV/FLU
    method reference: OSHA Manual of Analytical Methods (OSHA PV2030)
    method classification: Partially Validated
    note: Results may not reflect accurate exposures to the polymeric forms of isocyanates. Keep filters refrigerated until use.

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