| Identification | More | [Name]
2-Methyl-1-butanol | [CAS]
137-32-6 | [Synonyms]
(+/-)-2-METHYL-1-BUTANOL
2-METHYL-1-BUTANOL
2-METHYL BUTANOL
2-METHYLBUTYL ALCOHOL
ACTIVE-AMYL ALCOHOL
DL-2-METHYL-1-BUTANOL
DL-SEC-BUTYLCARBINOL
FEMA 3998
L(-)-2-METHYL-1-BUTANOL
L-2-METHYL BUTANOL
LAEVO-2-METHYL-1-BUTANOL
METHYL-1-BUTANOL, 2-
PRIM ACTIVE AMYL ALCOHOL
PRIMARY ACTIVE AMYL ALCOHOL
(S)-(-)-2-METHYL-1-BUTANOL
(S)-(-)-2-METHYLBUTANOL
SEC-BUTYL CARBINOL
(S)-(-)-SEC-BUTYLCARBINOL
(±)-2-methyl-butan-1-ol
(R,S)-2-Methyl-butan-1-ol | [EINECS(EC#)]
205-289-9 | [Molecular Formula]
C5H12O | [MDL Number]
MFCD00004743 | [Molecular Weight]
88.15 | [MOL File]
137-32-6.mol |
| Chemical Properties | Back Directory | [Definition]
The
active alcohol from fusel oil. The synthetic product
is a racemic mixture of both dextroand levorotatory compounds and therefore not optically active. | [Appearance]
Amyl alcohols (pentanols) have eight isomers.
All are flammable, colorless liquids, except the isomer 2,2-
dimethyl-1-propanol, which is a crystalline solid. | [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)
| [FEMA ]
3998 | [refractive index ]
n20/D 1.411
| [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 | [Odor]
at 100.00 %. ethereal fusel alcoholic fatty greasy winey whiskey leathery cocoa | [PH]
7 (H2O) | [biological source]
synthetic | [explosive limit]
1.2-10.3%(V) | [Odor Type]
ethereal | [Water Solubility ]
3.6 g/100 mL (30 ºC) | [JECFA Number]
1199 | [Merck ]
14,6030 | [BRN ]
1718810 | [Henry's Law Constant]
7.6×10-1 mol/(m3Pa) at 25℃, Brockbank (2013) | [Major Application]
flavors and fragrances | [Cosmetics Ingredients Functions]
PERFUMING | [InChI]
1S/C5H12O/c1-3-5(2)4-6/h5-6H,3-4H2,1-2H3 | [InChIKey]
QPRQEDXDYOZYLA-UHFFFAOYSA-N | [SMILES]
CCC(C)CO | [LogP]
1.22 | [Surface tension]
24.09mN/m at 293.15K | [Uses]
Solvent, organic synthesis (introduction of
active amyl group), lubricants, plasticizers, additives for oils and paints. | [CAS DataBase Reference]
137-32-6(CAS DataBase Reference) | [NIST Chemistry Reference]
1-Butanol, 2-methyl-(137-32-6) | [EPA Substance Registry System]
137-32-6(EPA Substance) |
| Safety Data | Back Directory | [Symbol(GHS) ]
  
GHS02,GHS05,GHS07 | [Signal word ]
Danger | [Hazard statements ]
H226-H315-H318-H332-H335 | [Precautionary statements ]
P210-P233-P280-P303+P361+P353-P304+P340+P312-P305+P351+P338 | [Hazard Codes ]
Xn | [Risk Statements ]
R10:Flammable.
R20:Harmful by inhalation.
R37:Irritating to the respiratory system.
R66:Repeated exposure may cause skin dryness or cracking. | [Safety Statements ]
S46:If swallowed, seek medical advice immediately and show this container or label . | [OEB]
A | [OEL]
TWA: 100.0 ppm; 360.0 mg/m3, STEL: 125.0 ppm; 450.0 mg/m3 | [RIDADR ]
UN 1105 3/PG 3
| [WGK Germany ]
3
| [RTECS ]
EL5250000
| [Autoignition Temperature]
725 °F | [TSCA ]
Yes | [REACH Registrations]
Active | [HazardClass ]
3 | [PackingGroup ]
III | [HS Code ]
29051500 | [Storage Class]
3 - Flammable liquids | [Hazard Classifications]
Acute Tox. 4 Inhalation
Eye Dam. 1
Flam. Liq. 3
Skin Irrit. 2
STOT SE 3 | [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. | [Hazardous Substances Data]
137-32-6(Hazardous Substances Data) | [Toxicity]
LD50 orally in Rabbit: 4170 mg/kg LD50 dermal Rabbit 2900 mg/kg |
| Hazard Information | Back Directory | [Hazard]
Moderate fire and explosion risk. Toxic by
ingestion, inhalation, and skin absorption. | [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. | [First aid]
Skin contact contributes significantly to overall
exposure. 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. | [Shipping]
UN2811 Pentanols, Hazard Class: 3; Labels: 3-
Flammable liquid. UN1987 Alcohols, n.o.s., Hazard Class:
3; Labels: 3-Flammable liquid. | [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. | [Chemical Properties]
(+/–)2-Methyl-1-butanol has a cooked, roasted aroma with fruity or alcoholic undernotes. | [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]
clear colorless to very slighlty yellow liquid | [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]
Reportedly present in over 120 natural food products, including apple, apricot, banana, orange, bilberry, black
currant, cranberry, papaya, strawberry, tomato and alcoholic beverages | [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. | [General Description]
S-(-)-2-Methyl-1-butanol is a precursor for the synthesis of chiral liquid crystals. It is a potential new-biofuel. | [Flammability and Explosibility]
Flammable | [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.] | [Toxics Screening Level]
The initial threshold screening level (ITSL) for 2-methyl-1-butanol is being set at 13 μg/m3 with annual averaging. |
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