| Citral | |
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| IUPAC name | 3,7-dimethyl-2,6-octadienal |
| Other names | citral geranial neral geranialdehyde |
| Identifiers | |
| CAS number | [5392-40-5] |
| RTECS number | RG5075000 |
| SMILES | O=CC=C(C)CCC=C(C)C |
| Properties | |
| Molecular formula | C10H16O |
| Molar mass | 152. IUPAC Nomenclature is a system of naming Chemical compounds and of describing the science of Chemistry in general CAS registry numbers are unique numerical identifiers for Chemical compounds Polymers biological sequences mixtures and Alloys They are also referred to Registry of Toxic Effects of Chemical Substances ( RTECS) is a Database of Toxicity information compiled from the open scientific literature without reference A chemical formula is a way of expressing information about the Atoms that constitute a particular Chemical compound, and how the relationship between those atoms changes Molar mass, symbol M, is the Mass of one mole of a substance ( Chemical element or Chemical compound) 24 g/mol |
| Appearance | Pale yellow liquid |
| Odor | Lemon like |
| Density | 0. The density of a material is defined as its Mass per unit Volume: \rho = \frac{m}{V} Different materials usually have different 893 g/cm³, liquid |
| Boiling point |
229 °C |
| Hazards | |
| NFPA 704 |
 1
0
0
|
| R-phrases | R36, R37, R38 |
| Flash point | 91 °C |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Citral, or 3,7-dimethyl-2,6-octadienal or lemonal, is either of a pair of terpenoids with the molecular formula C10H16O. The boiling point of a liquid is the temperature at which the Vapor pressure of the liquid equals the environmental pressure surrounding the liquid Symbolism The four divisions are typically color-coded with blue indicating level of Health Hazard, red indicating R-phrases (short for Risk Phrases) are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous R-phrases (short for Risk Phrases) are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous R-phrases (short for Risk Phrases) are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous R-phrases (short for Risk Phrases) are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous The flash point of a flammable liquid is the lowest Temperature at which it can form an ignitable mixture in air In Chemistry, the standard state of a material is its state at 1 bar (100 Kilopascals exactly The terpenoids, sometimes referred to as isoprenoids, are a large and diverse class of naturally-occurring organic chemicals similar to Terpenes derived Carbon (kɑɹbən is a Chemical element with the symbol C and its Atomic number is 6 Hydrogen (ˈhaɪdrədʒən is the Chemical element with Atomic number 1 Oxygen (from the Greek roots ὀξύς (oxys (acid literally "sharp" from the taste of acids and -γενής (-genēs (producer literally begetteris the The two compounds are double bond isomers. This article is about the chemical concept For "isomerism" of atomic nuclei see Nuclear isomer. The E-isomer is known as geranial or citral A. The Z-isomer is known as neral or citral B.
Geranial has a strong lemon odor. Neral has a lemon odor that is less intense, but sweeter. Citral is therefore an aroma compound used in perfumery for its citrus effect. Citral is also used as a flavor and for fortifying lemon oil. It also has strong anti-microbial qualities[1], and pheromonal effects in insects. An antimicrobial is a substance that kills or inhibits the growth of Microbes such as Bacteria, Fungi, or Viruses. [2][3]
Citral is used in the synthesis of vitamin A, ionone, and methylionone, and to mask the smell of smoke. Vitamin A refers to a family of similarly shaped molecules the Retinoids. The ionones are a series of closely related Chemical substances that are part of a group of compounds known as rose ketones which also includes Damascones and
Citral is present in the oils of several plants, including lemon myrtle (90-98%), Litsea cubeba (70-85%), lemongrass (65-85%), Lemon verbena (30-35%), Lemon ironbark (26%), lemon balm (11%), lemon and orange. Backhousia citriodora (common names lemon myrtle, lemon scented myrtle, lemon scented ironwood) is a Flowering plant in the family May Chang ( Litsea cubeba Aromatic litsea) is an Evergreen tree or shrub 5-12 meters high in the Lauraceae family Cymbopogon is a genus of about 55 species of grasses, native to warm temperate and tropical regions of the Old World and Oceania. Lemon verbena or Lemon beebrush ( Syn Aloysia triphylla) is a Deciduous Perennial Shrub native to Argentina Eucalyptus staigeriana, Lemon Ironbark or Lemon-scented Ironbark, is a small rough barked Sclerophyll Tree that grows naturally in pure Lemon balm ( Melissa officinalis) not to be confused with Bee balm, Monarda species is a perennial Herb in the The lemon ( Citrus × limon) is a hybrid in cultivated wild plants An orange —specifically the sweet orange —is the Citrus fruit Citrus sinensis ( syn [4] [5]
Contents |
Health & Safety information
Citral should be avoided by people with perfume allergy[6].
See also
References
Footnotes
- ^ Onawunmi, G. Citronellal or rhodinal or 37-dimethyloct-6-en-1-al ( C 10 H 18 O) is a monoterpenoid, the main Geraniol is a monoterpenoid and an Alcohol. It is the primary part of Rose oil, Palmarosa oil and Citronella oil (Java type Nerol is a natural monoterpene found in many Essential oils such as Lemongrass. O. (1989) Evaluation of the antimicrobial activity of citral. Lett. Appl. Microbial. 9, 105-108.
- ^ Kuwahara, Y. , Suzuki, H. , Matsumoto, K. & Wada, Y. (1983) Pheromone study on acarid mites. XI. Function of mite body as geometrical isomerization and reduction of citral (the alarm pheromone) Carpoglyphus lactis. Appl. Entomol. Zool. 18, 30-39.
- ^ Robacker, D. C. & Hendry, L. B. (1977) Neral and geranial: components of the sex pheromone of the parasitic wasp, Itoplectis conquisitor, J. Chem. Ecol. 3, 563-577.
- ^ Lawless, J. , The Illustrated Encyclopedia of Essential Oils, ISBN 1-85230-661-0
- ^ The Aromatic Plant Project [1]
- ^ Survey and health assessment of chemical substances in massage oils
General references
- MSDS [2]
External links
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