4,4'-Methylenebis(cyclohexylamine)
CAS 1761-71-3
EC 217-168-8
Formula C13H26N2
MW 210.36 g/mol
Amines Plastics & PolymersCoatings, Adhesives, Sealants & ElastomersAutomotive Cross-linking & Curing
Description
4,4'-Methylenebis(cyclohexylamine), commonly known as PACM or PACM20 and also referred to as Bis(4-Aminocyclohexyl)methane, is an aliphatic diamine with CAS number 1761-71-3 and EC number 217-168-8. It carries no assigned E-code. The compound is classified under HS code 29213000 within the amines category.
In epoxy systems, PACM20 functions as a stoichiometric curing agent, reacting with epoxide groups to form dense, chemically resistant thermoset networks suited to structural adhesives and high-performance coatings. In polyurea and polyamide formulations, its two primary amine groups drive chain extension and crosslinking, producing elastomers with improved thermal stability for automotive underbody and sealing applications.
This material is supplied in compliance with REACH regulations and is available for procurement across European markets. Grades vary in isomer composition, which directly affects cure speed and final network flexibility. Packaging formats are confirmed at the point of order based on volume requirements.
In epoxy systems, PACM20 functions as a stoichiometric curing agent, reacting with epoxide groups to form dense, chemically resistant thermoset networks suited to structural adhesives and high-performance coatings. In polyurea and polyamide formulations, its two primary amine groups drive chain extension and crosslinking, producing elastomers with improved thermal stability for automotive underbody and sealing applications.
This material is supplied in compliance with REACH regulations and is available for procurement across European markets. Grades vary in isomer composition, which directly affects cure speed and final network flexibility. Packaging formats are confirmed at the point of order based on volume requirements.
Physical Properties
| Melting Point | 39.6 °C |
| Boiling Point | 127-133 °C @ Press: 0.3-0.6 Torr |
| Density | 0.9380 g/cm³ @ Temp: 60 °C |
| Flash Point | >230 °F |
| Color | White or Colorless to Almost white or Almost colorless |
| Odor | Ammonia odor |
| Form | powder to lump to clear liquid |
| Water Solubility | Insoluble (<0.1 g/100 mL) |
| Vapor Pressure | <0.1 mm Hg ( 38 °C) |
| Refractive Index | 1.5032 (estimate) |
| Log P | 2.03 at 25℃ |
Safety & Handling (Learn More)
Danger GHS05 GHS06 GHS07 GHS08 GHS09
H
H302H314H317H318H330H335H361H371H373H401H411H412
P
P203P260P261P264P270P271P272P273P280P284P316P317P318P319P320P321P330P363P391P405P501P264+P265P301+P317P302+P352P304+P340P308+P316P333+P317P362+P364P403+P233P301+P330+P331P302+P361+P354P305+P354+P338
Trade & Regulatory
| HS Code | 29213000 |
| UN Number | 2928 |
| ADR Class | 6.1 |
| Packing Group | II |
| Storage Class | 8A - Combustible corrosive hazardous materials |
| WGK (Germany) | 2 |
Other Names
4,4'-Diaminodicyclohexylmethane4-[(4-aminocyclohexyl)methyl]cyclohexan-1-amineBis(4-Aminocyclohexyl)methane4,4-diaminodicyclohexylmethane4,4'-methylenebiscyclohexanaminBACMPACMPACM20TIMTEC-BB SBB008433
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