CAS No. 2550-26-7
Appearence: Colorless liquid
Odor Type: Floral
Refractive Index: 1.510-1.513
Boiling Point: 235-237
Flash Point: 98
Soluble In: Alcohol
Insoluble In: Water
Application: Benzyl acetone is mainly used in synthesis of
flavor and pharmaceutical
Appearance : yellow crystals
Assay : 99.00 to 100.00 %
Food Chemicals Codex Listed : No
Specific gravity : 0.98500 to 0.99100 @ 25.00 °C.
Pounds per gallon - calc. : 8.196 to 8.246
Refractive index : 1.50900 to 1.51500 @ 20.00 °C.
Boiling point : 235.00 °C. @ 760.00 mm Hg
Boiling point : 115.00 °C. @ 13.00 mm Hg
Flash point : 208.00 °F. TCC ( 97.78 °C. )
LogP (o/w) : 1.96
most important hazard(s) : Xi - Irritant
R 38 - Irritating to skin.
S 02 - Keep out of the reach of children.
S 24 - Avoid contact with skin.
S 36 - Wear suitable protective clothing.
Oral Toxicity(LD50) :
Oral-Rat [sex: M] 3200.00 mg/kg
Oral-Mouse 1590.00 mg/kg
Intraperitoneal-Mouse 583.00 mg/kg
Dermal Toxicity(LD50) : Skin-Rabbit >5000.00 mg/kg
Inhalation Toxicity(LC50) : Not determined
The emission of a single compound, benzyl acetone (BA,
4-phenyl-2-butanone), is barely detectable during the day in the
headspace of flowers of the self-compatible disturbance species
Nicotiana attenuata, but it increases dramatically (50×) in the evening,
becoming the dominant component in the floral headspace. This striking
temporal pattern of emission may be sculpted by its potential ecological
roles (e.g., synomonal and kairomonal), which we examine here. We
measured the nightly BA emissions from individual flowers at six
different branch positions on plants receiving either self-pollen or
pollen from another genotype and calculated the nightly whole-plant
emission. The first flowers produced on a branch have a lower rate of
emission than flowers produced later on the same branch; however, cross
pollination did not influence the quantity of BA emitted from
subsequently produced flowers. Informed by these measures of whole-plant
emission, we constructed a device that released BA at a constant rate
equivalent to that of a plant with 240 open flowers (an approximate 10×
increase in emissions).
This device and a control device were attached to 50 matched pairs of
plants growing in a native population in Utah to estimate the fitness
consequences of enhanced, constant BA emission. Plants with elevated BA
emissions in the field were browsed more frequently than control plants
and produced fewer capsules, so that lifetime seed production was
reduced by 3.1%. However, both treatment and control plants were heavily
attacked by negro bugs (Cormelina spp.) and produced light seeds with
low viabilities, representing 47% and 23% of the mass per seed and
viability, respectively, of unmanipulated plants, which flowered two
weeks later in the same population. From glasshouse experiments, we
estimated the consequences of out-crossing and attack by negro bugs on
seed production. Out-crossing did not significantly affect seed
production, seed mass or viability. In contrast, negro bug infestation
dramatically decreased seed mass and viability.
We conclude that while the phenological variation in attack rates might
have obscured our ability to estimate the fitness consequences of
enhanced BA emission, the effects are likely to be dominated by
kairomonal rather than synomonal interactions for this self-compatible
Benzylacetone can be prepared by hydrogenating benzylideneacetone in the
presence of a palladium catalyst on activated carbon and/or a palladium
catalyst on aluminum oxide.
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