ChemicalBook CAS DataBase List 74-31-7

74-31-7

Name	N,N-Diphenyl-p-phenylenediamine
CAS	74-31-7
EINECS(EC#)	200-806-4
Molecular Formula	C18H16N2
MDL Number	MFCD00003015
Molecular Weight	260.33
MOL File	74-31-7.mol

Chemical Properties

Appearance	grey powder
Melting point	143-145 °C(lit.)
Boiling point	220-225 °C0.5 mm Hg(lit.)
bulk density	560kg/m3
density	1.2
refractive index	1.6300 (estimate)
Fp	220-225°C/1mm
storage temp.	2-8°C
solubility	DMSO (Slightly), Methanol (Slightly)
form	Solid
pka	1.85±0.20(Predicted)
color	Pale Grey to Very Dark Grey
Stability:	Stable. Incompatible with strong acids, strong oxidizing agents
Water Solubility	<0.1 g/100 mL at 20 ºC
Merck	14,3329
BRN	2215944
Henry's Law Constant	4.7×10⁴ mol/(m³Pa) at 25℃, HSDB (2015)
InChI	1S/C18H16N2/c1-3-7-15(8-4-1)19-17-11-13-18(14-12-17)20-16-9-5-2-6-10-16/h1-14,19-20H
Contact allergens	A rubber accelerant, formerly contained in “blackrubber mix.” The most frequent occupational categories are in the metal industry, homemakers, health services and laboratories, and the building industry. less more
InChIKey	UTGQNNCQYDRXCH-UHFFFAOYSA-N
SMILES	N(c1ccccc1)c2ccc(Nc3ccccc3)cc2
LogP	4.536 (est)
CAS DataBase Reference	74-31-7(CAS DataBase Reference)
NIST Chemistry Reference	1,4-Benzenediamine, N,N'-diphenyl-(74-31-7)
EPA Substance Registry System	74-31-7(EPA Substance)

Safety Data

Symbol(GHS)	GHS07
Signal word	Warning
Hazard statements	H317-H412
Precautionary statements	P273-P280-P302+P352
Hazard Codes	Xi
Risk Statements	R43:May cause sensitization by skin contact. R52/53:Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment . less more
Safety Statements	S24:Avoid contact with skin . S37:Wear suitable gloves . S61:Avoid release to the environment. Refer to special instructions safety data sheet . less more
WGK Germany	1
RTECS	ST2275000
TSCA	Yes
REACH Registrations	Active
HS Code	29215900
Storage Class	11 - Combustible Solids
Hazard Classifications	Aquatic Chronic 3 Skin Sens. 1
Hazardous Substances Data	74-31-7(Hazardous Substances Data)
Toxicity	LD50 orally in Rabbit: 2370 mg/kg LD50 dermal Rat 4500 mg/kg less more

Raw materials And Preparation Products

Hazard Information

Chemical Properties

grey powder

Definition

ChEBI: An N-substituted diamine that is 1,4-phenylenediamine in which one hydrogen from each amino group is replaced by a phenyl group.

Uses

Polymerization inhibitor. Antioxidant for rubber, petroleum oils, feedstuffs.

General Description

Gray or dark gray powder or flakes.

Reactivity Profile

N,N'-DIPHENYL-P-PHENYLENEDIAMINE(74-31-7) may react with oxidizing materials . 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.

Air & Water Reactions

Insoluble in water.

Fire Hazard

This chemical is combustible. This chemical may form explosive dust-air mixtures.

Description

N,N'-Diphenyl-4-phenylenediamine (DPPD) is a rubber accelerant, formerly contained in the "black rubber mix". The most frequent occupational categories are in metal industry, homemakers, health services and laboratories, and building industries.

Purification Methods

Crystallise the diamine from EtOH, chlorobenzene/pet ether or *benzene. It has also been crystallised from aniline, then extracted three times with absolute EtOH. [Beilstein 13 H 80.]

Material Safety Data Sheet(MSDS)

Spectrum Detail

Well-known Reagent Company Product Information

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