hex-2-enal Property

Melting point:

-66°C (estimate)

Boiling point:

133.68°C (estimate)

Density 

0.8445

refractive index 

1.4460

FEMA 

2560 | HEXEN-2-AL

color 

A colourless liquid.

Odor

at 100.00 %. sweet almond fruity green leafy apple plum vegetable

Odor Type

green

JECFA Number

1353

LogP

1.58

EPA Substance Registry System

2-Hexenal (505-57-7)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H226Flammable liquid and vapour

H302Harmful if swallowed

H311Toxic in contact with skin

H317May cause an allergic skin reaction

H411Toxic to aquatic life with long lasting effects

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P272Contaminated work clothing should not be allowed out of the workplace.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P312Call a POISON CENTER or doctor/physician if you feel unwell.

P321Specific treatment (see … on this label).

P322Specific measures (see …on this label).

P330Rinse mouth.

P333+P313IF SKIN irritation or rash occurs: Get medical advice/attention.

P361Remove/Take off immediately all contaminated clothing.

P363Wash contaminated clothing before reuse.

P405Store locked up.

P501Dispose of contents/container to..…

hex-2-enal Chemical Properties,Usage,Production

Description

2-Hexenal has a characteristic green, leafy odor.

Chemical Properties

2-Hexenal has a sweet, fragrant, almond, fruity green, leafy, apple, plum, vegetable odor.

Occurrence

Reported found in the distillation waters of several plants, such as Carpinus betulus; also identified among the constituents of tea (leaves) oil and in citronella. Also reported found in numerous foods including apple juice, apricot, banana, citrus peel oils and juices, blueberry, strawberry, guava, peach, pear, melon, cabbage, kohlrabi, cucumber, lettuce, leek, peas, tomato, thymus, butter, milk, fish, fish oil, meats, hop oil, beer, grape wines, peanut oil, pecans, potato chips, soybeans, avocado, olive, passion fruit, plum, Malay apple, star fruit, mango, cauliflower, fig, artichoke, coriander leaf, rice, radish, lovage leaf, laurel, loquat, endive, nectarines, clam, quince and tobacco.

Preparation

From interaction of butyraldehyde acetal with vinyl ether followed by hydrolysis or by any other suitable means.

Definition

ChEBI: A hexenal having the double bond at the 2-position.

Aroma threshold values

Detection: 30 ppb; aroma characteristics at 1.0%: pungent green fatty, fresh fruity aldehydic, with fresh leafy apple and watermelon nuances.

Taste threshold values

Taste characteristics at 5 ppm: fruity, fresh green, herbal and vegetative, apple and melon with a slight yeasty nuance.

Toxicity evaluation

The acute oral LD₅₀ value in rats was reported as 0.85 g/kg (0.65-1.05 g/kg) (Moreno, 1973). The oral LD₅₀ values for trans-2-hexenal were reported as 780-1130 and 1550-1750 mg/kg in rats and mice, respectively, and the ip LD₅₀ values were reported as 100-200 mg/kg in both species (Gaunt, Colley, Wright, Creasey, Grasso & Gangolli, 1971). The acute dermal LD₅₀ value in rabbits was reported as 0.60 g/kg (0.37-0.83 g/kg) (Moreno, 1973).