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HCID 61339Generated: November 4, 2026

Zinc bis[O,O-bis(2-ethylhexyl)] bis(dithiophosphate)

Zinc-di(2-ethylhexyl)dithiophosphate · zinc bis(2-ethylhexyl)dithiophosphate · ZINCBISOODI2ETHYLHEXYLDITHIOPHOSPHATE · Zinc bis[O,O-bis(2-ethylhexyl) dithiophosphate] · Bis[bis(2-ethylhexyloxy)phosphinothioylthio]zinc · zinc bis(2-ethylhexoxy)-sulfido-thioxo-phosphorane · zinc bis[O,O-bis(2-ethylhexyl)] bis(dithiophosphate) · Bis(O,O-bis(2-ethylhexyl)dithiophosphate-S,S)zinc(T-4)

https://huagongshe.com/en/chemical/61339

Zinc bis[O,O-bis(2-ethylhexyl)] bis(dithiophosphate) molecular structure

Identifiers & Physical Properties

CAS No.	4259-15-8
Molecular formula	C32H68O4P2S4Zn
Average molar mass	772.5 g/mol
Monoisotopic mass	770.276711 g/mol
SMILES	CCCCC(CC)COP(=S)([S-])OCC(CC)CCCC.CCCCC(CC)COP(=S)([S-])OCC(CC)CCCC.[Zn+2]
InChIKey	OECQDNKCDGGPFY-UHFFFAOYSA-L
PubChem CID	61339
EC No.	224-235-5
DTXSID	DTXSID5027566

Chemical & Physical Properties

Topological polar surface area	103
Hydrogen bond donors	0
Hydrogen bond acceptors	8
Rotatable bonds	28
Heavy atoms	43
Formal charge	0
Complexity	255
Chemical classes	Metals -> Metals, Organic Compounds
Physical Description	Large CrystalsLiquid[IUCLID] Amber liquid with an odor of alcohol[MSDSonline]
Vapor pressure	0-0.024Pa at 25-70℃
Solubility	Chloroform (Slightly), Ethyl Acetate (Slightly)
Physical state	Viscous
InChI	InChI=1S/2C16H35O2PS2.Zn/c21-5-9-11-15(7-3)13-17-19(20,21)18-14-16(8-4)12-10-6-2/h215-16H,5-14H2,1-4H3,(H,20,21)/q-2/p+2
InChIKey	YVNSKXQECPVKRT-UHFFFAOYSA-P
SMILES	O(P1(=S[Zn+2]2(S=P(OCC(CC)CCCC)(OCC(CC)CCCC)[SH-]2)[SH-]1)OCC(CC)CCCC)CC(CC)CCCC
LogP (partition coefficient)	3.59 at 22℃ and pH5
Surface tension	63.7mN/m at 1.25g/L and 21℃
FDA UNII	08VKE04H4Q
EPA Substance Registry System	Zinc, bis[O,O-bis(2-ethylhexyl) phosphorodithioato-.kappa.S,.kappa.S']-, (T-4)- (4259-15-8)
GHS pictogram	GHS09,GHS05
Signal word	Danger
GHS hazard statements	H318-H411
GHS precautionary statements	P280-P305+P351+P338-P310
TSCA inventory status	TSCA listed
REACH registrations	Active

Safety & Regulations

GHS classification	DangerH318 (88.9%): Causes serious eye damage [Danger Serious eye damage/eye irritation]P264+P265, P273, P280, P305+P354+P338, P317, P391, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 657 reports by companies from 5 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Regulatory information	Chemical: Phosphorodithioic acid, O,O-bis(2-ethylhexyl) ester, zinc saltZinc, bis[O,O-bis(2-ethylhexyl) phosphorodithioato-.kappa.S,.kappa.S']-, (T-4)- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Zinc, bis[O,O-bis(2-ethylhexyl) phosphorodithioato-.kappa.S,.kappa.S']-, (T-4)- are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)REACH registered substance: Zinc bis[O,O-bis(2-ethylhexyl)] bis(dithiophosphate) (EC: 224-235-5)Zinc, bis[O,O-bis(2-ethylhexyl) phosphorodithioato-.kappa.S,.kappa.S']-, (T-4)-: Does not have an individual approval but may be used under an appropriate group standard
Other safety information	IMAP assessments - Phosphorodithioic acid, O,O-bis(2-ethylhexyl) ester, zinc salt: Human health tier I assessment
Hazards summary	A skin and eye irritant, based on animal studies[IUCLID] A moderate skin irritantA severe eye irritant that could cause permanent damage[MSDSonline] See Zinc dialkyldithiophosphates.
Hazard Classes and Categories	Eye Dam. 1 (88.9%)
TSCA inventory status	TSCA listed
Signal word	Danger
GHS pictogram	GHS09,GHS05
GHS hazard statements	H318-H411
REACH registrations	Active
GHS precautionary statements	P280-P305+P351+P338-P310

Applications & Uses

Uses

Zinc Bis(2-Ethylhexyl) Phosphorodithioate is an analytical standard with antioxidant properties.

Zinc bis[O,O-bis(2-ethylhexyl)] bis(dithiophosphate)

CAS No.

4259-15-8

Molecular formula

C32H68O4P2S4Zn

Average molar mass

772.5 g/mol

Monoisotopic mass

770.276711 g/mol

SMILES

CCCCC(CC)COP(=S)([S-])OCC(CC)CCCC.CCCCC(CC)COP(=S)([S-])OCC(CC)CCCC.[Zn+2]

InChIKey

OECQDNKCDGGPFY-UHFFFAOYSA-L

PubChem CID

61339

EC No.

224-235-5

DTXSID

DTXSID5027566

Chemical & Physical Properties

Topological polar surface area

103

Hydrogen bond donors

Hydrogen bond acceptors

Rotatable bonds

Heavy atoms

Formal charge

Complexity

255

Chemical classes

Metals -> Metals, Organic Compounds

Physical Description

Large CrystalsLiquid[IUCLID] Amber liquid with an odor of alcohol[MSDSonline]

Vapor pressure

0-0.024Pa at 25-70℃

Solubility

Chloroform (Slightly), Ethyl Acetate (Slightly)

Physical state

Viscous

InChI

InChI=1S/2C16H35O2PS2.Zn/c2*1-5-9-11-15(7-3)13-17-19(20,21)18-14-16(8-4)12-10-6-2/h2*15-16H,5-14H2,1-4H3,(H,20,21)/q-2/p+2

InChIKey

YVNSKXQECPVKRT-UHFFFAOYSA-P

SMILES

O(P1(=S[Zn+2]2(S=P(OCC(CC)CCCC)(OCC(CC)CCCC)[SH-]2)[SH-]1)OCC(CC)CCCC)CC(CC)CCCC

LogP (partition coefficient)

3.59 at 22℃ and pH5

Surface tension

63.7mN/m at 1.25g/L and 21℃

FDA UNII

08VKE04H4Q

EPA Substance Registry System

Zinc, bis[O,O-bis(2-ethylhexyl) phosphorodithioato-.kappa.S,.kappa.S']-, (T-4)- (4259-15-8)

GHS pictogram

GHS09,GHS05

Signal word

Danger

GHS hazard statements

H318-H411

GHS precautionary statements

P280-P305+P351+P338-P310

TSCA inventory status

TSCA listed

REACH registrations

Active

Safety & Regulations

GHS classification

DangerH318 (88.9%): Causes serious eye damage [Danger Serious eye damage/eye irritation]P264+P265, P273, P280, P305+P354+P338, P317, P391, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 657 reports by companies from 5 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Regulatory information

Chemical: Phosphorodithioic acid, O,O-bis(2-ethylhexyl) ester, zinc saltZinc, bis[O,O-bis(2-ethylhexyl) phosphorodithioato-.kappa.S,.kappa.S']-, (T-4)- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Zinc, bis[O,O-bis(2-ethylhexyl) phosphorodithioato-.kappa.S,.kappa.S']-, (T-4)- are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)REACH registered substance: Zinc bis[O,O-bis(2-ethylhexyl)] bis(dithiophosphate) (EC: 224-235-5)Zinc, bis[O,O-bis(2-ethylhexyl) phosphorodithioato-.kappa.S,.kappa.S']-, (T-4)-: Does not have an individual approval but may be used under an appropriate group standard

Other safety information

IMAP assessments - Phosphorodithioic acid, O,O-bis(2-ethylhexyl) ester, zinc salt: Human health tier I assessment

Hazards summary

A skin and eye irritant, based on animal studies[IUCLID] A moderate skin irritantA severe eye irritant that could cause permanent damage[MSDSonline] See Zinc dialkyldithiophosphates.

Hazard Classes and Categories

Eye Dam. 1 (88.9%)