Substance profile
N,N'-Diphenyl-P-Phenylenediamine
N,N'-Diphenyl-P-Phenylenediamine is colorless leaflets from alcohol; commercial grades are greenish-brown.
01 · Identification
What N,N'-Diphenyl-P-Phenylenediami… is
N,N'-Diphenyl-P-Phenylenediamine is colorless leaflets from alcohol; commercial grades are greenish-brown. Its molecular formula is C18H16N2 and its molecular weight is 260.3 g/mol. It melts at 151 °C.
Under the GHS it carries the signal word Warning.
Other names for N,N'-Diphenyl-P-Phenylenediami…
- N,N'-diphenyl-1,4-benzenediamine
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
| Code | Hazard statement |
|---|---|
| H317 | May cause an allergic skin reaction. |
| H412 | Harmful to aquatic life with long lasting effects. |
Precautionary statements: P261, P272, P273, P280, P313, P333, P501
03 · Physical and chemical properties
N,N'-Diphenyl-P-Phenylenediami… properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 222.5 °C (432.5 °F) | range, midpoint shown, at 0.5 mmHg (reduced pressure) | HSDB |
| Melting point | 150.5 °C (302.9 °F) | range, midpoint shown | HSDB |
| 148.5 °C (299.3 °F) | range, midpoint shown | HSDB | |
| 148.61 °C (299.5 °F) | range, midpoint shown | CAMEO | |
| Density | 1.2 g/cm³ | HSDB | |
| 1.21 g/cm³ | CAMEO | ||
| Solubility | Solubility in water: none | ICSC | |
| less than 1 mg/mL at 68 °F (NTP, 1992) | at 20 °C | CAMEO | |
| Vapor pressure | 6.35e-9 mmHg | at 25 °C | HSDB |
| 1e-8 mmHg | Haz-Map | ||
| Flash point | 204.44 °C (400 °F) | CAMEO | |
| 232 °C (449.6 °F) | ICSC | ||
| Vapor density | 9 (air = 1) | HSDB | |
| Critical temperature and pressure | 632.85 °C (1171.1 °F) | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Source notes
Further notes on N,N'-Diphenyl-P-Phenylenediami…
These are descriptions rather than measured values, so they are kept out of the table above and quoted here with the source that reported them.
Solubility
Sol in monochlorobenzene, benzene, DMF, ether, chloroform, acetone, ethyl acetate, isopropyl acetate, glacial acetic acid. Slightly sol in alcohol. Almost insol in petr ether, water.
Source: HSDB
05 · Handling and storage
Storing and handling N,N'-Diphenyl-P-Phenylenediami…
Storage conditions
...MATERIALS WHICH ARE TOXIC AS STORED OR WHICH CAN DECOMP INTO TOXIC COMPONENTS DUE TO CONTACT WITH HEAT, MOISTURE, ACID, OR ACID FUMES, SHOULD BE STORED IN COOL, WELL-VENTILATED PLACE, OUT OF DIRECT RAYS OF SUN, AWAY FROM AREAS OF HIGH FIRE HAZARD & SHOULD BE PERIODICALLY INSPECTED & MONITORED.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
N,N'-DIPHENYL-P-PHENYLENEDIAMINE may react with oxidizing materials (NTP, 1992). Neutralizes acids in exothermic reactions to form salts plus water. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen may be generated in combination with strong reducing agents, such as hydrides.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check N,N'-Diphenyl-P-Phenylene… in the storage compatibility matrix →