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.
Reactivity Profile
2-METHYL-5-ETHYLPYRIDINE(104-90-5) 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].
Air & Water Reactions
Insoluble in water.
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.
Potential Exposure
In manufacture of nicotinic acid,
vinyl pyridine monomer; in intermediates for insecticides,
germicides and textile chemicals
Fire Hazard
Special Hazards of Combustion Products: Irritating vapors are generated when heated
First aid
If this chemical gets into the eyes, remove any
contact lenses at once and irrigate immediately for at least
15 minutes, occasionally lifting upper and lower lids. Seek
medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately
with soap and water. Seek medical attention immediately.
If this chemical has been inhaled, remove from exposure,
begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if
heart action has stopped. Transfer promptly to a medical
facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce
vomiting. Do not make an unconscious person vomit.
Medical observation is recommended for 24 to 48 hours
after breathing overexposure, as pulmonary edema may be
delayed. As first aid for pulmonary edema, a doctor or
authorized paramedic may consider administering a drug or
other inhalation therapy.
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.
Description
2-Methyl-5-ethyl pyridine is a colorless liquidwith a sharp, aromatic odor. Molecular weight = 121.20;Boiling point = 128℃; Flash point = 39℃; also listed at68℃; Autoignition temperature 5 538℃. Explosive limits:LEL 5 1.1%; UEL 5 6.6%. Hazard Identification (based onNFPA-704 M Rating System): Health 2, Flammability 2,Reactivity 0. Slightly soluble in water.
Chemical Properties
2-Methyl-5-ethyl pyridine is a colorless liquid
with a sharp, aromatic odor.
Chemical Properties
5-Ethyl-2-methylpyridine has a sharp penetrating aromatic aroma.
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
Occurrence
Reported in dry red beans, cocoa, tea, whiskey, peppermint oil, roasted and fried chicken, cocoa, coffee and
cooked shrimps.
Definition
ChEBI: 5-Ethyl-2-methylpyridine is a member of methylpyridines.
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
Flammability and Explosibility
Nonflammable
storage
Color Code—Blue: Health Hazard/Poison: Storein a secure poison location. Prior to working with thischemical you should be trained on its proper handling andstorage. Before entering confined space where this chemicalmay be present, check to make sure that an explosive concentration does not exist. Store in tightly closed containersin a cool, well-ventilated area away from oxidizers. Wherepossible, automatically pump liquid from drums or otherstorage containers to process containers. Sources of ignition, such as smoking and open flames, are prohibitedwhere this chemical is handled, used, or stored. Metal containers involving the transfer of 5 gallons or more of thischemical should be grounded and bonded. Drums must beequipped with self-closing valves, pressure vacuum bungs,and flame arresters. Use only nonsparking tools and equipment, especially when opening and closing containers ofthis chemical. Wherever this chemical is used, handled,manufactured, or stored, use explosion-proof electricalequipment and fittings.
