6PPD

6PPD
Names
	Preferred IUPAC name N1-(4-Methylpentan-2-yl)-N4-phenylbenzene-1,4-diamine
	Other names N-(1,3-dimethylbutyl)-N'-phenyl-1,4-benzenediamine; N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine; 6PPD; HPPD; DMBPPD;
Identifiers
CAS Number	793-24-8 ;
3D model (JSmol)	Interactive image;
ChEMBL	ChEMBL1558796;
ChemSpider	12553;
ECHA InfoCard	100.011.222
EC Number	212-344-0;
PubChem CID	13101;
UNII	HJD0U67PS1 ;
UN number	3077
CompTox Dashboard (EPA)	DTXSID9025114 ;
	InChI InChI=1S/C18H24N2/c1-14(2)13-15(3)19-17-9-11-18(12-10-17)20-16-7-5-4-6-8-16/h4-12,14-15,19-20H,13H2,1-3H3 Key: ZZMVLMVFYMGSMY-UHFFFAOYSA-N;
	SMILES CC(C)CC(C)NC1=CC=C(C=C1)NC2=CC=CC=C2;
Properties
Chemical formula	C18H24N2
Molar mass	268.404 g·mol−1
Appearance	brown or violet solid powder
Density	1.07
Melting point	45 °C (113 °F; 318 K)
Boiling point	260 °C (500 °F; 533 K)
log P	3.972
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H317, H360, H410
Precautionary statements	P201, P202, P261, P264, P270, P272, P273, P280, P281, P301+P312, P302+P352, P308+P313, P321, P330, P333+P313, P363, P391, P405, P501
Flash point	204 °C (399 °F; 477 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

6PPD is an organic chemical widely used as stabilising additive (or antidegradant) in rubbers, such as natural rubber, styrene-butadiene and butyl rubber; all of which are common in vehicle tires. Although it is an effective antioxidant, it is primarily used because of its excellent antiozonant performance. It is one of several antiozonants based around p-phenylenediamine.

It has been used in rubber since the late 1970s, but has been the subject of increasing scrutiny since 2021, when it was determined that its oxidation product (6PPD-Q) causes pre-spawn mortality in coho salmon.