Diphenylamine (CAS 122-39-4), also named N-Phenylaniline, is an aromatic secondary amine, appearing as white to light brown crystalline flakes. It features good antioxidant performance and active reaction sites for organic synthesis, widely applied in rubber additives, dye intermediates, lubricant antioxidants and analytical chemistry. TNJ Chemical is the leading manufacturer and exporter since from 2001. We guarantee high quality, competitive price, stable supply, fast delivery and tech support etc. To find more, please contact sales@tnjchem.com

Product Information

Chemical Name: Diphenylamine

Alias: N-Phenylaniline, DPA

EINECS No.: 204-539-4

Molecular Formula: C₁₂H₁₁N

MDL No.: MFCD00003014

Chemphysical Properties

Appearance White to light brown crystalline flakes

Odor Slight aromatic amine odor

Melting Point 52–54℃

Boiling Point 302℃

Solubility Insoluble in water; soluble in ethanol, ether, benzene and other organic solvents

Quality Specification (Industrial Grade)

Use & Application

Diphenylamine acts as a key raw material for manufacturing rubber antioxidants, polymerization inhibitors and vulcanization accelerators, protecting rubber and elastomer products from thermal and oxidative aging during processing and service life. It serves as a critical intermediate to synthesize multiple acid dyes and disperse dyes including Acid Yellow G, Acid Orange IV and Disperse Blue 5R. It is widely used to produce antioxidants for lubricating oil, grease and plastic stabilizers to delay oxidation degradation of oil and polymer materials. In propellant and explosive industries, it works as stabilizer for nitrocellulose and smokeless powder, capturing decomposition products and extending storage lifetime. In laboratory analysis, diphenylamine is used as redox indicator and color reagent for detection of nitrates, chlorates and quantitative DNA testing. It can also be applied as intermediate for veterinary drugs and pesticides, and used in post-harvest treatment to prevent superficial scald of apples during cold storage.

Packing
25kg woven bag with PE inner liner, or customized packing as customer request.

Delivery & Storage

Store in tightly sealed package in cool, dry and ventilated warehouse. 

Protect from light, moisture and strong oxidants. Avoid mixing with strong acids. Classified as hazardous goods for transportation. 

Shelf life: 12 months under proper storage.