- 2-METHYLUNDECANAL
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- $0.00 / 1kg
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2023-10-31
- CAS:110-41-8
- Min. Order: 1kg
- Purity: 99%
- Supply Ability: 50000kg
- 2-METHYLUNDECANAL
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- $0.00 / 25KG
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2023-09-26
- CAS:110-41-8
- Min. Order: 1KG
- Purity: 99%
- Supply Ability: 50000KG/month
- 2-METHYLUNDECANAL
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- $30.00 / 1KG
-
2023-09-06
- CAS:110-41-8
- Min. Order: 50KG
- Purity: 99%
- Supply Ability: 500000kg
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| | 2-METHYLUNDECANAL Basic information |
| | 2-METHYLUNDECANAL Chemical Properties |
| Boiling point | 171 °C(lit.) | | density | 0.83 g/mL at 25 °C(lit.) | | vapor pressure | 2.4Pa at 20℃ | | refractive index | n20/D 1.432(lit.) | | FEMA | 2749 | 2-METHYLUNDECANAL | | Fp | 200 °F | | Odor | at 1.00 % in dipropylene glycol. fresh amber aldehydic moss citrus tuberose metallic waxy coumarinic | | Odor Type | aldehydic | | Water Solubility | 1.3mg/L at 20℃ | | JECFA Number | 275 | | LogP | 4.9 at 35℃ | | CAS DataBase Reference | 110-41-8(CAS DataBase Reference) | | EPA Substance Registry System | Undecanal, 2-methyl- (110-41-8) |
| WGK Germany | 1 | | RTECS | YQ1509000 | | toxicity | The acute oral LD50 value was reported as > 5 g/kg in the rat . The acute dermal LD50 for sample no. 71-16 was reported to be > 10 g/kg in the rabbit |
| | 2-METHYLUNDECANAL Usage And Synthesis |
| Description | 2-Methylundecanal has a characteristic fatty odor assuming a floral
note on dilution. It has an acrid, fatty unpleasant flavor at high
levels. At low levels, the flavor is honey- and nut-like. It may be
prepared by cracking the corresponding glycidic acid; from
α-nonyl acrolein; from methyl nonyl ketone and ethyl monochloroacetate
in the presence of sodium ethylate. | | Chemical Properties | clear colourless to yellowish liquid | | Chemical Properties | 2-Methylundecanal has a characteristic fatty odor assuming a floral note on dilution. At high levels, it has an acrid, fatty,
unpleasant flavor. At low levels, the flavor is honey and nut-like. | | Occurrence | Reported found in kumquat peel oil. | | Uses | Perfumery, flavoring. | | Preparation | 2-Methylundecanal is reported as being
found in nature. It is a colorless liquid, with an odor markedly different from that
of the isomeric dodecanal. It has a fatty odor with incense and ambergris notes.
2-Methylundecanal is produced by two routes:
1) 2-Undecanone is converted into its glycidate by reaction with an alkyl
chloroacetate. Saponification of the glycidate, followed by decarboxylation,
yields 2-methylundecanal.
2) The second synthesis is based on the conversion of undecanal into 2-
methyleneundecanal by reaction with formaldehyde in the presence of
catalytic amounts of amines. Hydrogenation of 2-methyleneundecanal
yields methylnonylacetaldehyde (MNA). A convenient process starts
from 1-decene: hydroformylation gives a mixture consisting mainly of
undecanal and 2-methyldecanal. Reaction of the crude product with
formaldehyde in the presence of dibutylamine yields a mixture containing
over 50% 2-methyleneundecanal. After hydrogenation of the double bond,
pure 2-methylundecanal is separated from the by-products by fractional
distillation.
In comparison with other fatty aldehydes, 2-methylundecanal is used in perfumery
in rather large amounts to impart conifer notes, particularly fir impressions,
but frequently also in fantasy compositions. | | Taste threshold values | Taste characteristics at 2 ppm: waxy, fatty, metallic with a citrus nuance. | | Flammability and Explosibility | Non flammable | | Safety Profile | Low toxicity by
ingestion and skin contact. When heated to
decomposition it emits acrid smoke and
irritating fumes. | | Synthesis | By cracking the corresponding glycidic acid; from α-nonyl acrolein; from methyl nonyl ketone and ethyl monochloroacetate in the presence of sodium ethylate | | Metabolism | See monograph on aldehyde C-8*. |
| | 2-METHYLUNDECANAL Preparation Products And Raw materials |
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