2-Methyl-1-Butanol
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2-Methyl-1-Butanol

2-Methyl-1-butanol's cas code is 137-32-6

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Product Description

2-Methyl-1-butanol Basic information



Product Name:

2-Methyl-1-butanol

Synonyms:

2-methylbutanol-1;2-Methyl-n-butanol;2-methyln-butanol;3-methyl iso-butanol;Active primary amyl alcohol;activeprimaryamylalcohol;alcool2-methylbutylique;CH3CH2CH(CH3)CH2OH

CAS:

137-32-6

MF:

C5H12O

MW:

88.15

EINECS:

205-289-9

Product Categories:

Alcohols;C2 to C6;Oxygen Compounds;Alphabetical Listings;Flavors and Fragrances;M-N;Pharmaceutical Intermediates;alcohol Flavor

Mol File:

137-32-6.mol



2-Methyl-1-butanol Chemical Properties


Melting point 

−70 °C(lit.)

alpha 

-0.1~+0.1°(20℃/D)(neat)

Boiling point 

130 °C mm Hg(lit.)

density 

0.819 g/mL at 20 °C(lit.)

vapor density 

3 (vs air)

vapor pressure 

3 mm Hg ( 20 °C)

refractive index 

n20/D 1.411

FEMA 

3998 | (+/-)-2-METHYL-1-BUTANOL

Fp 

110 °F

storage temp. 

Flammables area

solubility 

water: slightly soluble3.6g/a00g at 30°C

form 

Liquid

pka

15.24±0.10(Predicted)

color 

Clear colorless to very slightly yellow

PH

7 (H2O)

explosive limit

1.2-10.3%(V)

Water Solubility 

3.6 g/100 mL (30 ºC)

Merck 

14,6030

JECFA Number

1199

BRN 

1718810

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)


2-Methyl-1-butanol Safety Information


Hazard Codes 

Xn

Risk Statements 

10-20-37-66

Safety Statements 

46-24/25

RIDADR 

UN 1105 3/PG 3

WGK Germany 

3

RTECS 

EL5250000

Autoignition Temperature

725 °F

TSCA 

Yes

HazardClass 

3

PackingGroup 

III

HS Code 

29051500

Hazardous Substances Data

137-32-6(Hazardous Substances Data)

Toxicity

LD50 orally in Rabbit: 4170 mg/kg LD50 dermal Rabbit 2900 mg/kg


2-Methyl-1-butanol Usage And Synthesis


Chemical Properties

clear colorless to very slighlty yellow liquid

Chemical Properties

Amyl alcohols (pentanols) have eight isomers. All are flammable, colorless liquids, except the isomer 2,2- dimethyl-1-propanol, which is a crystalline solid.

Chemical Properties

(+/–)2-Methyl-1-butanol has a cooked, roasted aroma with fruity or alcoholic undernotes.

Uses

Solvent, organic synthesis (introduction of active amyl group), lubricants, plasticizers, additives for oils and paints.

Definition

The active alcohol from fusel oil. The synthetic product is a racemic mixture of both dextroand levorotatory compounds and therefore not optically active.

Preparation

Prepared from hydroboration of 2-methyl-1-butene. (–)2-Methyl-1-butanol is isolated by fractional distillation of fusel oil

Production Methods

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.

Hazard

Moderate fire and explosion risk. Toxic by ingestion, inhalation, and skin absorption.

Safety Profile

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.

Potential Exposure

(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.

Shipping

UN2811 Pentanols, Hazard Class: 3; Labels: 3- Flammable liquid. UN1987 Alcohols, n.o.s., Hazard Class: 3; Labels: 3-Flammable liquid.

Purification Methods

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.]

Incompatibilities

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.

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.


2-Methyl-1-butanol Preparation Products And Raw materials


Preparation Products

2-Methylbutyl 2-methylbutyrate-->Methyl isovalerate

Raw materials

FUSEL OIL


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