2-Methyl-1-butanol Chemical Properties
- Melting point:
- −70 °C(lit.)
- Boiling point:
- 130 °C mm Hg(lit.)
- 0.819 g/mL at 20 °C(lit.)
- vapor density
- 3 (vs air)
- vapor pressure
- 3 mm Hg ( 20 °C)
- refractive index
- 3998 | (+/-)-2-METHYL-1-BUTANOL
- Flash point:
- 110 °F
- storage temp.
- Flammables area
- water: slightly soluble3.6g/a00g at 30°C
- Clear colorless to very slightly yellow
- 7 (H2O)
- explosive limit
- Water Solubility
- 3.6 g/100 mL (30 ºC)
- JECFA Number
- CAS DataBase Reference
- 137-32-6(CAS DataBase Reference)
- NIST Chemistry Reference
- 1-Butanol, 2-methyl-(137-32-6)
- EPA Substance Registry System
- 2-Methyl-1-butanol (137-32-6)
- Hazard Codes
- Risk Statements
- Safety Statements
- UN 1105 3/PG 3
- WGK Germany
- Autoignition Temperature
- 725 °F
- HS Code
- Hazardous Substances Data
- 137-32-6(Hazardous Substances Data)
- LD50 orally in Rabbit: 4170 mg/kg LD50 dermal Rabbit 2900 mg/kg
2-Methyl-1-butanol Usage And Synthesis
clear colorless to very slighlty yellow liquid
Amyl alcohols (pentanols) have eight isomers. All are flammable, colorless liquids, except the isomer 2,2- dimethyl-1-propanol, which is a crystalline solid.
(+/–)2-Methyl-1-butanol has a cooked, roasted aroma with fruity or alcoholic undernotes.
Reportedly present in over 120 natural food products, including apple, apricot, banana, orange, bilberry, black currant, cranberry, papaya, strawberry, tomato and alcoholic beverages
2-Methyl-1-butanol is a whiskey-scented amyl alcohol that is naturally present in all fruits wine and beer. 2-Methyl-1-butanol is commercially used as a solvent in paints and oils and as flavorant in many processed foods. 2-Methyl-1-butanol has a characteristic redolence, which is thought to account for its active properties as an attractant for hornets and certain wasps, such as yellowjackets, in traps. As a biochemical active ingredient, it has a non-toxic mode of action – targeted pests are killed through physical entrapment.
Solvent, organic synthesis (introduction of active amyl group), lubricants, plasticizers, additives for oils and paints.
The active alcohol from fusel oil. The synthetic product is a racemic mixture of both dextroand levorotatory compounds and therefore not optically active.
Prepared from hydroboration of 2-methyl-1-butene. (–)2-Methyl-1-butanol is isolated by fractional distillation of fusel oil
2-methyl-1-butanol are refined from ethanol production as fusel oil. Isoamyl alcohols are used as solvents for oils, fats, resins, and waxes; in the plastics industry in spinning polyacrylonitrile; and in manufacturing lacquers, chemicals, and pharmaceuticals.
Aroma threshold values
Odor threshold in air: detection at 0.14 mg/m3; recognition at 0.83 to 1.7 mg/m3.
Moderate fire and explosion risk. Toxic by ingestion, inhalation, and skin absorption.
Moderately toxic by skin contact and intraperitoneal routes. Mddly toxic by ingestion. An eye, skin, and mucous membrane irritant. Can cause deafness, delirium, headache, nausea, and vomiting. Flammable liquid when exposed to heat, flame, or oxidizers. Explosive in the form of vapor when exposed to heat or flame. Incompatible with H2S3. To fight fire, use alcohol foam, spray, mist, dry chemical. When heated to decomposition it emits acrid smoke and irritating fumes. See also ALCOHOLS.
(n-isomer); Suspected reprotoxic hazard, Primary irritant (w/o allergic reaction), (iso-, primary): Possible risk of forming tumors, Primary irritant (w/o allergic reaction), (sec-, active primary-, and other isomers) Primary irritant (w/o allergic reaction). Used as a solvent in organic synthesis and synthetic flavoring, pharmaceuticals, corrosion inhibitors; making plastics and other chemicals; as a flotation agent. The (n-isomer) is used in preparation of oil additives, plasticizers, synthetic lubricants, and as a solvent.
UN2811 Pentanols, Hazard Class: 3; Labels: 3- Flammable liquid. UN1987 Alcohols, n.o.s., Hazard Class: 3; Labels: 3-Flammable liquid.
Reflux the butanol with CaO, distil, reflux with magnesium and again fractionally distil it. A small sample of highly purified material is obtained by fractional crystallisation after conversion into a suitable ester such as the trinitrophthalate or the 3-nitrophthalate. The latter is converted to the cinchonine salt in acetone and recrystallised from CHCl3 by adding pentane. The salt is saponified, extracted with ether, and fractionally distilled. [Terry et al. J Chem Eng Data 5 403 1960, Beilstein 1 IV 1666.]
Forms an explosive mixture with air. Contact with strong oxidizers and hydrogen trisulfide may cause fire and explosions. Incompatible with strong acids. Violent reaction with alkaline earth metals forming hydrogen, a flammable gas.
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.
- BUTTPARK 60\40-48
- ETHYL 2-FORMYL-1-CYCLOPROPANECARBOXYLATE
- 2,2-DICHLORO-1-METHYLCYCLOPROPANECARBOXYLIC ACID
- DIETHYL 1,2-CYCLOPROPANEDICARBOXYLATE
- CHRYSANTHEMYL ALCOHOL
- BUTTPARK 60\40-46
- BUTTPARK 60\40-34
- 2-Ethylhexyl chloroformate
- 1-BROMO-CYCLOBUTANECARBOXYLIC ACID ETHYL ESTER
- ETHYL 1-METHYLCYCLOPROPANE-1-CARBOXYLATE
- ethyl 3-(2,2-dichlorovinyl)-2,2-dimethyl-1-cyclopropanecarboxylate
- 2-METHYLCYCLOPROPANECARBOXYLIC ACID
- 1-(4-CHLOROPHENYL)-1-CYCLOPROPANECARBOXYLIC ACID
- 3-METHYLENECYCLOPROPANE-TRANS-1,2-DICARBOXYLIC ACID
- METHYL 2,2-DICHLORO-1-METHYLCYCLOPROPANECARBOXYLATE
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