FEMA 2817 Chemical Properties

Boiling point:

164 °C

Density 

1.07 g/mL at 25 °C

refractive index 

n20/D 1.5534

FEMA 

2817 | ONION OIL (ALLIUM CEPA L.)

Flash point:

178 °F

Odor

at 0.10 % in propylene glycol. obnoxious sulfide onion

Odor Type

sulfurous

CAS DataBase Reference

8002-72-0

EPA Substance Registry System

Onion oil (8002-72-0)

Safety Information

Hazard Codes 

Xn

Risk Statements 

10-22-36/37/38

Safety Statements 

26-36

RIDADR 

UN 1993 3/PG 3

WGK Germany 

3

RTECS 

RL0725000

HazardClass 

3.2

PackingGroup 

III

FEMA 2817 Usage And Synthesis

Description

Herbaceous plant originally from the Middle East, but today widespread throughout the world because of the large consumption of the edible bulb, the only part used. The stalk can reach approximately 1 m (39 in.) in height. The bulb consists of several concentric tunics. Onion has a strong, pungent, lasting odor and a characteristic onion flavor.
The essential oil is obtained by distillation of the bulbs with yields of about 0.02%. The physical-chemical constants vary widely, depending on the origin of the plant. The oil is a yellowish liquid with a characteristic onion odor. Main constituents of the oil are d-n-propyl disulfide and methyl-n-propyl disulfide.
The derivatives are oleoresin, fluid concentrated water extract, and the fluid extract. The first two derivatives are obtained by special manufacturing processes from thermally pretreated bulbs in order to enhance some flavor top notes, as well as the flavoring strength.

Chemical Properties

Obtained by steam distillation of the bulbs with yields of about 0.02%. The physical–chemical constants vary widely, depending on the origin of the plant. The oil has a characteristic onion odor.

Physical properties

The oil is a clear, amber-yellow-to-amber-orange liquid. It is soluble in most fixed oils, mineral oil and alcohol. It is insoluble in propylene glycol and glycerin.

Definition

Extractives and their physically modified derivatives. Allium cepa, Liliaceae.

Essential oil composition

Main constituents of the oil are d-n-propyl disulfide and methyl-n-propyl dilsufide.

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