Dytek® HMI, an abbreviation for hexamethyleneimine, functions as a corrosion inhibitor and serves as an intermediate for various industries, including pharmaceuticals, agricultural chemicals, zeolite manufacture, dyes, inks, rubber chemicals, and textile chemicals. Its versatility extends to corrosion inhibitors and ore flotation processes.

Chemical Name: Hexamethyleneimine

CAS Number: 111-49-9

Functions: Corrosion Inhibitor

Chemical Family: Amines

Synonyms: Azacycloheptane, Azepane, Hexahydro-1H-azepine, Hexamethylenimine

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Identification & Functionality

Chemical Family
Chemical Name
Fluids & Lubricants Functions
EC No.
Molecular Structure

INVISTA Dytek HMI Molecular Structure

Applications & Uses


Intermediate for:

  • Pharmaceuticals
  • Agricultural chemicals
  • Zeolite manufacture
  • Dyes
  • Inks
  • Rubber chemicals
  • Textile chemicals
  • Corrosion inhibitors
  • Ore flotation


Physical Form
Clear colorless liquid
Ammonia like
Typical Properties
ValueUnitsTest Method / Conditions
Amine Value560
Boiling Point (760 mmHg)138°C
Cyclohexylamine Content0.38wt%
Flash Point22 (71.6)°C (°F)Closed Cup
Heat of Vaporization9.3kcal/mol
Hexamethylenediamine Content0.02wt%
Hexamethyleneimine Content99.5wt%
Melting Point–37 (-34.6)°C (°F)
Molecular Weight99.177g/mol
n-Hexylamine Content0.02wt%
Refractive Index (at 20°C (68°F))1.463
Specific Gravity (25°C (77°F))0.88
Vapor Pressure (25°C (77°F))9 (48)mmHg
Water Content0.07wt%

Technical Details & Test Data

Vapor Pressure of Dytek® HMI

INVISTA Dytek HMI Vapor Pressure of Dytek HMI

Packaging & Availability

Packaging Information
Railcar Net Weight : 150,000/68,040 (lbs/kg)
Tank truck Net Weight : 45,000/20,400 (lbs/kg)
ISO containers Net Weight : 40,000/18,000 (lbs/kg)
Drums Net Weight : 400/181 (lbs/kg)
EU Drums Net Weight : 180 kg (lbs/kg)
DOT/IMO Proper Shipping Name Hexamethyleneimine
Hazard Class 3
UN Number 2493
Packaging Group II
DOT/IMO Label Flammable Liquid, Corrosive
Subsidiary Hazard Class