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Chemical Datasheet
DIPHENYLAMINE |
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Chemical Identifiers
CAS Number |
UN/NA Number |
DOT Hazard Label |
USCG CHRIS Code |
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NIOSH Pocket Guide |
International Chem Safety Card |
Diphenylamine
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NFPA 704
General Description
Light tan to brown solid with a pleasant odor. Sinks in water. (USCG, 1999)
Hazards
Reactivity Alerts
none
Air & Water Reactions
Dust may be explosive if mixed with air in critical proportions and in the presence of a source of ignition (USCG, 1999). Insoluble in water.
Fire Hazard
Special Hazards of Combustion Products: Toxic oxides of nitrogen may form in fire.
Behavior in Fire: Dust may be explosive if mixed with air in critical proportions and in the presence of a source of ignition. (USCG, 1999)
Health Hazard
Inhalation may irritate mucous membranes. Overexposure, including ingestion of solid or skin contact, may cause fast pulse, hypertension, and bladder trouble. Contact with dust irritates eyes. (USCG, 1999)
Reactivity Profile
DIPHENYLAMINE discolors in light. This chemical can react violently with hexachloromelamine and trichloromelamine. It is incompatible with strong oxidizing agents and strong acids. It is also incompatible with iron and silver salts. It reacts with nitrogen oxides. (NTP, 1992)
Belongs to the Following Reactive Group(s)
Potentially Incompatible Absorbents
No information available.
Response Recommendations
Isolation and Evacuation
Excerpt from 154
[Substances - Toxic and/or Corrosive (Non-Combustible)]:
IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids.
SPILL: Increase the immediate precautionary measure distance, in the downwind direction, as necessary.
FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2020)
Firefighting
Fire Extinguishing Agents Not to Be Used: Water or foam may cause frothing.
Fire Extinguishing Agents: Foam, dry chemical, carbon dioxide (USCG, 1999)
Non-Fire Response
SMALL SPILLS AND LEAKAGE: Should a spill occur while you are handling this chemical, FIRST REMOVE ALL SOURCES OF IGNITION, then you should dampen the solid spill material with 60-70% ethanol and transfer the dampened material to a suitable container. Use absorbent paper dampened with 60-70% ethanol to pick up any remaining material. Seal the absorbent paper, and any of your clothes, which may be contaminated, in a vapor-tight plastic bag for eventual disposal. Solvent wash all contaminated surfaces with 60-70% ethanol followed by washing with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.
STORAGE PRECAUTIONS: You should protect this material from exposure to light, and store it in a refrigerator. (NTP, 1992)
Protective Clothing
Excerpt from NIOSH Pocket Guide for Diphenylamine:
Skin: PREVENT SKIN CONTACT - Wear appropriate personal protective clothing to prevent skin contact.
Eyes: PREVENT EYE CONTACT - Wear appropriate eye protection to prevent eye contact.
Wash skin: DAILY - The worker should wash daily at the end of each work shift, and prior to eating, drinking, smoking, etc.
Remove: WHEN WET OR CONTAMINATED - Work clothing that becomes wet or significantly contaminated should be removed and replaced.
Change: DAILY - Workers whose clothing may have become contaminated should change into uncontaminated clothing before leaving the work premises. (NIOSH, 2023)
DuPont Tychem® Suit Fabrics
No information available.
First Aid
EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.
SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.
INHALATION: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used; if not available, use a level of protection greater than or equal to that advised under Protective Clothing.
INGESTION: DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital. (NTP, 1992)
Physical Properties
Flash Point:
307°F
(NTP, 1992)
Lower Explosive Limit (LEL): data unavailable
Upper Explosive Limit (UEL): data unavailable
Autoignition Temperature:
1175°F
(USCG, 1999)
Melting Point:
129 to 131°F
(NTP, 1992)
Vapor Pressure:
1 mmHg
at 226.9°F
; 60 mmHg at 404.4°F
(NTP, 1992)
Vapor Density (Relative to Air):
5.82
(NTP, 1992)
- Heavier than air; will sink
Specific Gravity:
1.068
at 141.8°F
(USCG, 1999)
- Denser than water; will sink
Boiling Point:
576°F
at 760 mmHg
(NTP, 1992)
Molecular Weight:
169.23
(NTP, 1992)
Water Solubility:
less than 1 mg/mL
at 61°F
(NTP, 1992)
Ionization Energy/Potential:
7.40 eV
(NIOSH, 2023)
IDLH: data unavailable
AEGLs (Acute Exposure Guideline Levels)
No AEGL information available.
ERPGs (Emergency Response Planning Guidelines)
No ERPG information available.
PACs (Protective Action Criteria)
Chemical |
PAC-1 |
PAC-2 |
PAC-3 |
Diphenylamine (122-39-4)
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30 mg/m3 |
180 mg/m3 |
220 mg/m3 |
(DOE, 2018)
Regulatory Information
EPA Consolidated List of Lists
Regulatory Name |
CAS Number/ 313 Category Code |
EPCRA 302 EHS TPQ |
EPCRA 304 EHS RQ |
CERCLA RQ |
EPCRA 313 TRI |
RCRA Code |
CAA 112(r) RMP TQ |
Diphenylamine |
122-39-4 |
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313 |
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(EPA List of Lists, 2022)
CISA Chemical Facility Anti-Terrorism Standards (CFATS)
No regulatory information available.
OSHA Process Safety Management (PSM) Standard List
No regulatory information available.
Alternate Chemical Names
- ANILINOBENZENE
- BENZENE, (PHENYLAMINO)-
- BIG DIPPER
- C.I. 10355
- DBA
- DFA
- DIPHENYLAMINE
- DPA
- N,N-DIPHENYLAMINE
- N-PHENYLANILINE
- N-PHENYLBENZENAMINE
- N-PHENYLBENZENEAMINE
- NO SCALD
- NO-SCALD
- (PHENYLAMINO)BENZENE
- PHENYLANILINE
- SCALDIP