Amines
REACH
4,4-Diaminodiphenylmethane
CAS Number
101-77-9
EC Number
202-974-4
Abbreviation
MDA
What is 4,4-Diaminodiphenylmethane?
4,4-Diaminodiphenylmethane (CAS 101-77-9), commercially known as MDA, is an aromatic diamine used as a curing agent and polymer building block.
Where is 4,4-Diaminodiphenylmethane used?
- Polyurethane and epoxy: hardener
- Rubber: antioxidant and cross-linking agent in tire components and elastomeric seals
- Polyurea and polyamide synthesis: diamine monomer for engineering polymers in films, fibers and molded parts
- Textile and leather: precursor to azo colorants for fiber dyeing
- Its two reactive amine groups enable controlled cross-linking and chain extension in high-performance polymer systems.
Commercial specifications
- Technical grade, purity commonly 99% or above
- Packaging from 25 kg bags to bulk containers
Other Names (Synonyms)
4-[(4-aminophenyl)methyl]aniline|4,4'-methylenedianiline|MDA
What are the physical properties of 4,4-Diaminodiphenylmethane?
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℃
How is 4,4-Diaminodiphenylmethane classified and handled safely? Learn More
Danger
GHS07· Irritant GHS08· Health Hazard GHS09· Environmental Hazard GHS06· Toxic
Hazard Statements
H301 Toxic if swallowed
H302 Harmful if swallowed
H311 Toxic in contact with skin
H316 Causes mild skin irritation
Precautionary Statements
P203 Obtain, consult and follow expert instructions for use.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P262 Do not get in eyes, on skin, or on clothing.
Which trade and regulatory codes apply to 4,4-Diaminodiphenylmethane?
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