二苯基对苯二胺

Description

Diphenyl-p-phenylenediamine · CAS 74-31-7 · C18H16N2. UNII DD517SCM92. Boiling Point: 428 to 437 °F at 0.5 mmHg (NTP, 1992); Boiling Point: 220-225 °C @ 0.5 mm Hg; Melting Point: 293 to 306 °F (NTP, 1992).

Identification

CAS Registry Number	74-31-7
PubChem CID	6319
Molecular formula	C18H16N2
IUPAC name	1-N,4-N-diphenylbenzene-1,4-diamine
UNII (FDA)	DD517SCM92

Computed Descriptors

Molecular Weight	260.3
XLogP3	5
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	4
Exact Mass	260.131348519
Monoisotopic Mass	260.131348519
Topological Polar Surface Area	24.1
Heavy Atom Count	20
Formal Charge	0

Physical & Chemical Properties

Boiling Point	428 to 437 °F at 0.5 mmHg (NTP, 1992)
Boiling Point	220-225 °C @ 0.5 mm Hg
Melting Point	293 to 306 °F (NTP, 1992)
Melting Point	150-151 °C
Flash Point	400 °F (NTP, 1992)
Flash Point	232 °C c.c.
Density	1.20
Vapor Density	9.0 (Air= 1)
Vapor Pressure	0.00000001 [mmHg]
Vapor Pressure	6.35X10-9 mm Hg @ 25 °C

Physical description & handling notes

• N,n'-diphenyl-p-phenylenediamine appears as gray or dark gray powder or flakes. (NTP, 1992)
• Liquid; Dry Powder
• Colorless solid; Commercial product is greenish-brown solid; [Merck Index] Colorless, grey, or white solid; [HSDB] Powder; [MSDSonline]
• COLOURLESS CRYSTALS OR GREY POWDER.
• Colorless leaflets from alcohol; commercial grades are greenish-brown
• Gray powder

Regulatory Status

Regulatory & Food Contact	FDA Cumulative Estimated Daily Intake (CEDI): FCS FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS

GHS Hazard Classification

Reported hazard statements	H317, H412, H341 (42.3%), H361 (42.3%), H400 (42.3%), H410 (21.4%)

Documented Uses

• Used as antioxidant (rubber, polyethylene, feedstuffs, petroleum, vegetable oils, animal fats, and oils), polymerization inhibitor, copper degradation inhibitor, and as an intermediate (dyes, drugs, plastics, and detergents); [HSDB]
• Petroleum Production and Refining [Category: Industry]
• ANTIOXIDANT FOR RUBBER, POLYETHYLENE, FEEDSTUFFS, PETROLEUM, VEGETABLE OILS, ANIMAL FATS & OILS; POLYMERIZATION INHIBITOR
• Polymerization inhibitor, antioxidant for rubber, petr oils, feedstuffs.
• THERAP CAT (VET): Antioxidant for feedstuffs
• Flex-resistant antioxidant in rubbers; stabilizer; polymerization inhibitor; retards copper degradation; intermediate for dyes, drugs, plastics and detergents.

Synonyms

74-31-7; N,N'-Diphenyl-p-phenylenediamine; N,N'-Diphenyl-1,4-phenylenediamine; DPPD; Diphenyl-p-phenylenediamine; AgeRite DPPD; 1,4-Dianilinobenzene; Flexamine G; Nonflex H; Diafen FF; Nonox DPPD; Antioxidant H; DFFD; Stabilizer DPPD; Altofane DIP; 1,4-Bis(phenylamino)benzene

Frequently Asked Questions

What are the CAS number and molecular formula of Diphenyl-p-phenylenediamine?

CAS 74-31-7; molecular formula C18H16N2; molecular weight — g/mol.

What other names is Diphenyl-p-phenylenediamine known by?

74-31-7, N,N'-Diphenyl-p-phenylenediamine, N,N'-Diphenyl-1,4-phenylenediamine, DPPD, Diphenyl-p-phenylenediamine, AgeRite DPPD.

What is the regulatory status of Diphenyl-p-phenylenediamine?

Documented regulatory listings: FDA Cumulative Estimated Daily Intake (CEDI): FCS; FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS.

Is Diphenyl-p-phenylenediamine classified as hazardous?

Hazard statements reported: H317, H412, H341, H361, H400.

What are the key physical properties of Diphenyl-p-phenylenediamine?

Boiling Point: 428 to 437 °F at 0.5 mmHg (NTP, 1992); Boiling Point: 220-225 °C @ 0.5 mm Hg; Melting Point: 293 to 306 °F (NTP, 1992); Melting Point: 150-151 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.