2,2'-Dipyridyldisulfide

2,2′-Dipyridyldisulfide
Names
	Preferred IUPAC name 2,2′-Disulfanediyldipyridine
	Other names 1,2-Di(pyridin-2-yl)disulfane (not recommended); 2,2′-Dipyridyldisulfide; 2,2′-Dipyridyldisulphide; Aldrithiol-2
Identifiers
CAS Number	2127-03-9;
3D model (JSmol)	Interactive image; Interactive image;
ChEBI	CHEBI:143170;
ChEMBL	ChEMBL118678 ;
ChemSpider	58603 ;
ECHA InfoCard	100.016.676
EC Number	218-343-1;
PubChem CID	65093;
UNII	L6X912UPBU ;
CompTox Dashboard (EPA)	DTXSID70175517 ;
	InChI InChI=1S/C10H8N2S2/c1-3-7-11-9(5-1)13-14-10-6-2-4-8-12-10/h1-8H Key: HAXFWIACAGNFHA-UHFFFAOYSA-N ; InChI=1/C10H8N2S2/c1-3-7-11-9(5-1)13-14-10-6-2-4-8-12-10/h1-8H Key: HAXFWIACAGNFHA-UHFFFAOYAJ;
	SMILES S(Sc1ncccc1)c2ncccc2; c1ccnc(c1)SSc2ccccn2;
Properties
Chemical formula	C10H8N2S2
Molar mass	220.31 g·mol−1
Melting point	56 to 58 °C (133 to 136 °F; 329 to 331 K)
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Irritant (Xi)
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

2,2′-Dipyridyldisulfide, sometimes known as DPS, is used for preparing thiols and activating carboxylic acid for coupling reactions, as in the following reaction: