4,4'-Methylenedianiline
CAS 101-77-9
EC 202-974-4
Formula C13H14N2
MW 198.26 g/mol
Amines Plastics & PolymersPersonal Care & CosmeticsCoatings, Adhesives, Sealants & ElastomersTextile, Leather & PaperRubber & Tire Cross-linking & CuringAntioxidant & Stabilizer
Description
4,4'-Methylenedianiline (CAS 101-77-9), also known as DDM, DAPM, DADPM, and by the trade name Tonox, is an aromatic diamine supplied as a pale yellow crystalline solid. It carries EC number 202-974-4 and is classified under HS code 29215900 within the amines category.
In polyurethane and epoxy systems, DDM functions as a curing agent and cross-linker, reacting with isocyanates or epoxide groups to build rigid, heat-resistant polymer networks. It is also used as an antioxidant stabilizer in rubber compounding, where it interrupts oxidative chain reactions to extend service life in tire and elastomer applications.
DDM is available in technical grade as a crystalline solid, typically packaged in sealed drums or fiber containers to limit air exposure. Procurement and use within the EU falls under REACH regulation (EC 1907/2006), and buyers should note its classification as a substance of very high concern (SVHC) requiring appropriate handling protocols.
In polyurethane and epoxy systems, DDM functions as a curing agent and cross-linker, reacting with isocyanates or epoxide groups to build rigid, heat-resistant polymer networks. It is also used as an antioxidant stabilizer in rubber compounding, where it interrupts oxidative chain reactions to extend service life in tire and elastomer applications.
DDM is available in technical grade as a crystalline solid, typically packaged in sealed drums or fiber containers to limit air exposure. Procurement and use within the EU falls under REACH regulation (EC 1907/2006), and buyers should note its classification as a substance of very high concern (SVHC) requiring appropriate handling protocols.
Physical Properties
| Melting Point | 91.5-92 °C |
| Boiling Point | 398-399 °C @ Press: 768 Torr |
| Density | 1.056 g/cm³ @ Temp: 100 °C |
| Flash Point | 430 °F |
| Appearance | 4,4’-Diaminodiphenylmethane is a pale yel- low crystalline solid (turns light brown on contact with air) with a faint amine-like odor. |
| Color | White to Light yellow |
| Form | neat |
| Water Solubility | Slightly soluble. <0.1 g/100 mL at 19 ºC |
| Vapor Pressure | 0Pa at 25℃ |
| Refractive Index | 1.5014 (estimate) |
| Log P | 1.55 at 25℃ |
Safety & Handling (Learn More)
Danger GHS07 GHS08 GHS09 GHS06
H
H301H302H311H316H317H319H341H350H351H361H370H372H373H400H410H411
P
P203P260P261P262P264P270P272P273P280P316P318P319P321P330P391P405P501P264+P265P301+P316P301+P317P302+P352P308+P316P332+P317P333+P317P337+P317P361+P364P362+P364P305+P351+P338
Trade & Regulatory
| HS Code | 29215900 |
| UN Number | 2651 |
| ADR Class | 6.1 |
| Packing Group | III |
| Storage Class | 6.1C - Combustible acute toxic Cat.3 toxic compounds or compounds which causing chronic effects |
| WGK (Germany) | 3 |
Other Names
4,4'-Diaminodiphenylmethane4-[(4-aminophenyl)methyl]anilineDDMMDADAPM4,4′-methylenedianilineTonoxDADPM4,4-METHYLENEDIANILINE
Related Products
Raw Materials
Need a chemical? Get a quote within 24 hours.