- ▸ MDI precursor: Feedstock for methylene diphenyl diisocyanate and polymeric MDI.
- ▸ Epoxy curing agent: Hardener for epoxy resins.
- ▸ Polyurethane elastomers: Curing agent/chain extender for cast PU elastomers.
- ▸ High-performance polymers: Monomer for polyamide and polyimide resins.
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Transport classification per the UN Model Regulations / 49 CFR 172.101 Hazardous Materials Table. Confirm against the grade-specific SDS (Section 14) before shipping.
Diaminodiphenylmethane (CAS 101-77-9), also called 4,4'-methylenedianiline, is an aromatic diamine used mainly as the precursor to methylene diphenyl diisocyanate (MDI) and polymeric MDI. PubChem also records its use as an epoxy and polyurethane-elastomer curing agent and as a monomer for polyamide and polyimide resins. Supplied as a bulk amine intermediate.
Frequently Asked Questions
What is diaminodiphenylmethane used for?
Diaminodiphenylmethane (MDA, CAS 101-77-9), also called 4,4'-methylenedianiline, is used mainly as the precursor to methylene diphenyl diisocyanate (MDI) and polymeric MDI. It also serves as an epoxy and polyurethane-elastomer curing agent and as a monomer for polyamide and polyimide resins.
What is methylenedianiline used for?
4,4'-Methylenedianiline is the same compound as MDA. Beyond being the feedstock for MDI/polymeric MDI, it is used as a hardener for epoxy resins, as a curing agent and chain extender for cast polyurethane elastomers, and as a monomer for high-performance polyamide and polyimide resins.
Is diaminodiphenylmethane the same as 4,4'-methylenedianiline?
Yes. Diaminodiphenylmethane (MDA) and 4,4'-methylenedianiline are names for the same aromatic diamine, CAS 101-77-9, formula C13H14N2. Specify by CAS when ordering to avoid synonym confusion.
How is MDA shipped and classified for transport?
For transport it is associated with UN 2651 (4,4'-diaminodiphenylmethane) and HS code 2921.59 (aromatic polyamines and derivatives: other). Consult the SDS for the full transport, GHS, and handling profile before arranging freight.
What is the cost of bulk MDA?
Bulk pricing depends on volume, packaging, and destination. Send your required quantity and ship-to details for a current quote; each shipment ships with a CoA and SDS.