104-90-5 Usage
Uses
Different sources of media describe the Uses of 104-90-5 differently. You can refer to the following data:
1. 5-Ethyl-2-methylpyridine is found in alcoholic beverages. 5-Ethyl-2-methylpyridine is present in dry red beans, cocoa, tea and whisky. 5-Ethyl-2-methylpyridine is a flavouring agent. 5-Ethyl-2-methylpyridine is one of the components that contribute to the nutty, roasted aroma in the Parmigiano-Reggiano cheese.
2. Perfume composition
3. 5-Ethyl-2-methylpyridine is used as specific solvent and as intermediate for several chemical reactions. Attributes PIS available on request. Please contact us. Contact
Chemical Properties
Different sources of media describe the Chemical Properties of 104-90-5 differently. You can refer to the following data:
1. 5-Ethyl-2-methylpyridine has a sharp penetrating aromatic aroma.
2. 2-Methyl-5-ethyl pyridine is a colorless liquid
with a sharp, aromatic odor.
Occurrence
Reported in dry red beans, cocoa, tea, whiskey, peppermint oil, roasted and fried chicken, cocoa, coffee and
cooked shrimps.
Preparation
Prepared by heating acetaldehyde ammonia in a double volume of absolute alcohol; by heating ammonia water and paraldehyde in presence of ammonium acetate.
Aroma threshold values
Detection: 19 ppb
General Description
A colorless to yellow liquid. Insoluble in water and more dense than water. Hence sinks in water. Contact may slightly irritate the skin, eyes, and mucous membranes. May be toxic by ingestion. Used to make other chemicals.
Air & Water Reactions
Insoluble in water.
Reactivity Profile
5-Ethyl-2-methylpyridine neutralizes acids in exothermic reactions to form salts plus water. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. May generate hydrogen, a flammable gas, in combination with strong reducing agents such as hydrides. A mixture of nitric acid and methyl ethyl pyridine was placed in an autoclave and heated and stirred for 40 minutes. The emergency vent opened due to a sudden pressure rise, then an explosion occurred after about 90 seconds [Chem. Eng. News 30:3348. 1952].
Hazard
Toxic. Corrosive and strong irritant to tis-sue.
Health Hazard
Breathing of vapors will cause vomiting and chest discomfort. Contact with liquid causes skin and eye burns.
Fire Hazard
Special Hazards of Combustion Products: Irritating vapors are generated when heated
Flammability and Explosibility
Nonflammable
Safety Profile
Poison by ingestion and
subcutaneous routes. Moderately toxic by
skin contact. iMildly toxic by inhalation.
Corrosive. A severe skin and eye irritant.
Flammable when exposed to heat or flame;
can react vigorously with oxidizers.
Potentially explosive reaction with nitric acid
at 145℃/14.5 bar. To fight fire, use alcohol foam. When heated to decomposition it
emits acrid smoke and irritating fumes. See
also ALDEHYDES.
Potential Exposure
In manufacture of nicotinic acid,
vinyl pyridine monomer; in intermediates for insecticides,
germicides and textile chemicals
Shipping
UN23002-Methyl-5-ethylpyridine, Hazard Class:
6.1; Labels: 6.1-Poisonous materials.
Incompatibilities
Vapors may form explosive mixture with
air. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep
away from alkaline materials, strong bases, strong acids,
oxoacids, epoxides, aldehydes, acid chlorides; chloroformates, isocyanates, phenols, cresols.
Waste Disposal
Dissolve or mix the
material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber.
All federal, state, and local environmental regulations
must be observed
Check Digit Verification of cas no
The CAS Registry Mumber 104-90-5 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 1,0 and 4 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 104-90:
(5*1)+(4*0)+(3*4)+(2*9)+(1*0)=35
35 % 10 = 5
So 104-90-5 is a valid CAS Registry Number.
104-90-5Relevant articles and documents
SYNTHESIS OF ALYKL SUBSTITUTED PYRIDINES BY LIQUID PHASE CONDENSATION OF ALDEHYDES WITH AMINES UNDER THE ACTION OF COMPLEXED METAL CATALYSTS
Selimov, F. A.,Akhmetov, A. Zh.,Dzhemilev, U. M.
, p. 1893 - 1895 (1987)
-
Synthetic Methods and Reactions; 87. Deoxygenation of Pyridine N-Oxides with Trimethyl(ethyl)amine-Sulfur Dioxide Complexes
Olah, George A.,Arvanaghi, Massoud,Vankar, Yashwant D.
, p. 660 - 661 (1980)
-
-
Frank,Seven
, p. 2629,2633 (1949)
-
Mesoporous Aluminosilicates in the Synthesis of N-Heterocyclic Compounds
Agliullin, M. R.,Bikbaeva, V. R.,Bubennov, S. V.,Filippova, N. A.,Gataulin, A. R.,Grigor’eva, N. G.,Kostyleva, S. A.,Kutepov, B. I.,Narender, Nama
, p. 733 - 743 (2020/02/25)
Abstract: The catalytic properties of samples of amorphous mesoporous aluminosilicate ASM with different Si/Al molar ratios (40, 80, 160) were studied in the synthesis of practically important pyridines (by the interaction of С2–С5 alcohols with formaldehyde and ammonia, cyclocondensation of acetaldehyde and propionic aldehyde with ammonia), dialkylquinolines and alkyltetrahydroquinolines (by reaction of aniline with C3, C4 aldehydes) and alkyldihydroquinolines (by interaction of aniline with ketones, acetone and acetophenone). It is found that mesoporous aluminosilicate ASM sample with a molar ratio of Si/Al = 40, which has the highest acidity among the studied samples, exhibits the highest activity and selectivity in these reactions.
Electrochemical oxidation of pyridine bases
-
, (2008/06/13)
-
