Allyl propyl disulfide

Allyl propyl disulfide

Names
Preferred IUPAC name 3-(Propyldisulfanyl)prop-1-ene
Other names 2-Propenyl propyl disulphide 4,5-Dithia-1-octene[1] Onion oil[1] 2-Propenyl propyl disulfide[1] Propyl allyl disulfide[1] 1-Allyl-2-propyldisulfane (not recommended)
Identifiers
CAS Number	2179-59-1 N
3D model (JSmol)	Interactive image
ChemSpider	15731 Y
ECHA InfoCard	100.016.864
EC Number	218-550-7
PubChem CID	16591
RTECS number	JO0350000
UNII	0167D73R1T
UN number	1993
CompTox Dashboard (EPA)	DTXSID8024448
InChI InChI=1S/C6H12S2/c1-3-5-7-8-6-4-2/h3H,1,4-6H2,2H3 Y Key: FCSSPCOFDUKHPV-UHFFFAOYSA-N Y InChI=1/C6H12S2/c1-3-5-7-8-6-4-2/h3H,1,4-6H2,2H3 Key: FCSSPCOFDUKHPV-UHFFFAOYAQ
SMILES S(SCCC)CC=C
Properties
Chemical formula	C6H12S2
Appearance	Pale-yellow liquid
Odor	strong onion-like odor[1]
Density	0.984 g/cm3
Melting point	−15 °C; 5 °F; 258 K
Solubility in water	Insoluble[1]
Hazards
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
Flash point	54.4 °C (129.9 °F; 327.5 K)
NIOSH (US health exposure limits):
PEL (Permissible)	TWA 2 ppm (12 mg/m3)[1]
REL (Recommended)	TWA 2 ppm (12 mg/m3) ST 3 ppm (18 mg/m3)[1]
IDLH (Immediate danger)	N.D. [1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

Allyl propyl disulfide is an organosulfur compound with the chemical formula C₃H₅S₂C₃H₇. It is a volatile pale-yellow liquid with a strong odor. It is a major component of onion oil and is used in food additives and flavors.^[2]

Allyl propyl disulfide is present in garlic and onion. When onion or garlic is sliced, the substance evaporates and causes eyes to irritate.^[3] When garlic or onion is cooked, it also evaporates, ridding them of the spicy taste, and leaving a sweet taste.^{[citation needed]}

References