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 Number: 11142-52-2

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

Laboratory Sampling/Analytical Method:

• 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.