Description Chemical properties Uses Production method Hazards & Safety Information
ChemicalBook > CAS DataBase List > 2-Methyl-1-propanol

2-Methyl-1-propanol

Description Chemical properties Uses Production method Hazards & Safety Information
Product Name
2-Methyl-1-propanol
CAS No.
78-83-1
Chemical Name
2-Methyl-1-propanol
Synonyms
ISOBUTANOL;IBA;ISOBUTYL ALCOHOL;2-METHYLPROPAN-1-OL;i-Butanol;2-Methyl propanol;NATURAL ISO BUTYL ALCOHOL;1-propanol,2-methyl-;isobutano;2-methyl-1-propano
CBNumber
CB3158955
Molecular Formula
C4H10O
Formula Weight
74.12
MOL File
78-83-1.mol
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2-Methyl-1-propanol Property

Melting point:
-108 °C (lit.)
Boiling point:
108 °C (lit.) 108 °C
Density 
0.803 g/mL at 25 °C (lit.)
vapor density 
2.55 (vs air)
vapor pressure 
8 mm Hg ( 20 °C)
refractive index 
n20/D 1.396(lit.)
FEMA 
2179 | ISOBUTYL ALCOHOL
Flash point:
82 °F
storage temp. 
Store at +5°C to +30°C.
solubility 
water: miscible70g/L at 20°C; miscible with alcohol and oils.
pka
>14 (Schwarzenbach et al., 1993)
form 
Solid
color 
APHA: ≤10
Odor
Slightly suffocating; nonresidual alcoholi
Relative polarity
0.552
PH
7 (80g/l, H2O, 20℃)
explosive limit
1.5-12%(V)
Odor Threshold
0.011ppm
Odor Type
ethereal
Water Solubility 
95 g/L (20 ºC)
λmax
λ: 260 nm Amax: 0.10
λ: 280 nm Amax: 0.06
JECFA Number
251
Merck 
14,5131
BRN 
1730878
Henry's Law Constant
20.0 at 30.00 °C, 72.2 at 50.00 °C, 133 at 60.00 °C, 216 at 70.00 °C, 330 at 80.00 °C (headspace- GC, Hovorka et al., 2002)
Dielectric constant
31.7（-80℃）
Exposure limits
TWA 300 mg/m3 (100 ppm) NIOSH, 150 mg/m3 (50 ppm) (ACGIH); IDLH 8000 ppm.
Stability:
Stable. Flammable. Incompatible with strong oxidizing agents, aluminium.
InChIKey
ZXEKIIBDNHEJCQ-UHFFFAOYSA-N
LogP
1 at 25℃
CAS DataBase Reference
78-83-1(CAS DataBase Reference)
NIST Chemistry Reference
1-Propanol, 2-methyl-(78-83-1)
EPA Substance Registry System
Isobutanol (78-83-1)
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Safety

Hazard Codes 
Xi
Risk Statements 
10-37/38-41-67
Safety Statements 
13-26-37/39-46-7/9
RIDADR 
UN 1212 3/PG 3
OEB
A
OEL
TWA: 50 ppm (150 mg/m3)
WGK Germany 
1
RTECS 
NP9625000
Autoignition Temperature
801 °F
TSCA 
Yes
HazardClass 
3
PackingGroup 
III
HS Code 
29051990
Hazardous Substances Data
78-83-1(Hazardous Substances Data)
Toxicity
LD50 orally in rats: 2.46 g/kg (Smyth)
IDLA
1,600 ppm
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H226Flammable liquid and vapour

H315Causes skin irritation

H318Causes serious eye damage

H335May cause respiratory irritation

H336May cause drowsiness or dizziness

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P233Keep container tightly closed.

P240Ground/bond container and receiving equipment.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
W217913
Product name
Isobutyl alcohol
Purity
natural, ≥99%, FCC, FG
Packaging
1kg
Price
$81.9
Updated
2024/03/01
Sigma-Aldrich
Product number
W217913
Product name
Isobutyl alcohol
Purity
natural, ≥99%, FCC, FG
Packaging
8kg
Price
$338
Updated
2024/03/01
Sigma-Aldrich
Product number
W217905
Product name
Isobutyl alcohol
Purity
≥99%, FCC, FG
Packaging
2Kg
Price
$106
Updated
2024/03/01
Sigma-Aldrich
Product number
W217905
Product name
Isobutyl alcohol
Purity
≥99%, FCC, FG
Packaging
8kg
Price
$180
Updated
2024/03/01
Sigma-Aldrich
Product number
W217905
Product name
Isobutyl alcohol
Purity
≥99%, FCC, FG
Packaging
20kg
Price
$343
Updated
2024/03/01
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2-Methyl-1-propanol Chemical Properties,Usage,Production

Description

Isobutanol, also known as isopropyl alcohol or 2-methyl propanol, is a colorless and flammable liquid. It is one of the main ingredients of fresh tea leaves, black tea and green tea to produce the wonderful aroma. The molecular weight of isobutanol is 74.12, with a boiling point of 107.66 ℃, a relative density of 0.8016, a refractive index of 1.3959, and a flash point of 37 ℃. It is soluble in alcohol and ether, but only slightly soluble in water. Isobutanol can form explosive mixtures with air, with an explosion limit of 2.4% (volume). It can also form addition compounds, such as CaCl2 • 3C4H10O, with calcium chloride.

Chemical properties

It is a kind of colorless transparent liquid with a special smell, soluble in water, and fully dissolved in ethanol and ether.

Uses

(1)  For analysis reagents, chromatography reagents, solvents and extraction agent.
(2)  As raw materials for the organic synthesis, and also act as a superior solvent.
(3)  Isobutanol is raw materials for organic synthesis. It mainly used in the synthesis of isobutyronitrile, an intermediate for diazinon.
(4)  As raw materials of organic synthesis, isobutanol is used in the manufacture of petroleum additives, antioxidants, 2, 6-butylated hydroxytoluene, isobutyl acetate (paint solvents), plasticizers, synthetic rubber, artificial musk, fruit oil and synthetic drugs. It can also be used to purify strontium, barium and lithium salts and other chemical reagents and used as a superior solvent.
(5)  Extraction solvent. Food flavors listed in GB 2760-96.

Production method

(1) In the presence of sodium amalgam or other catalysts, it is derived from the reduction of butyraldehyde；r it is derived from the distillation of the by-product obtained from the synthesis of methanol.
(2) 1. Carbonyl synthesis (by-product of butanol production from propylene) : using propylene and synthesis gas as raw material, going through  carbonyl synthesis in the system to get  n-butyl and isobutyl  aldehyde, after the catalyst, hydrogenating into alcohol, then undergoing dehydration and separation can obtain the product of   n-butyl and isobutyl  alcohol respectively.
2. Hydrogenation of isobutyraldehyde: isobutyraldehyde via the liquid hydrogenation reaction, obtained isobutanol in the catalytic nickel.
3. Recycle from isobutyl oil, a byproduct of synthetic methanol distillation: isobutanol is obtained by dehydration of methanol, salting out and then azeotropic distillation of isobutyl oil.
(3) The preparation method is using synthesis gas and propylene as raw materials, obtaining isobutyraldehyde during the carbonyl synthesis of 2-ethylhexyl alcohol, and then by hydrogenation to acquire isobutanol.

Hazards & Safety Information

Category: Flammable liquids
Toxic classification: Moderately hazardous
Acute toxicity: Oral-Rat LD50: 2460 mg/kg; Abdominal-Mouse LD50: 1801 mg/kg
Stimulation data: Eye-Rabbit 2 mg Severity
Explosives hazardous characteristics: To be explosive when mix with air.
Flammability hazard characteristics: Flammable in case of fire, high temperature, oxidant; stimulating the smoke when combustion.
Storage and transportation characteristics: Ventilation and low-temperature drying in treasury; oxidants and acids stored separately.
Extinguishing agent: Dry powder, dry sand, carbon dioxide, foam.
Occupational Standard: TWA 50 PPM.

Description

Isobutyl alcohol has a disagreeable odor. May be prepared from isobutylene; by reduction of isobutyraldehyde with sodium amalgam or in the presence of a catalyst; by fermentation of isobutyraldehyde; isolated during fermentation of carbohydrates.

Chemical Properties

Isobutyl alcohol has a penetrating, wine-like, disagreeable odor

Physical properties

Clear, colorless, oily liquid with a sweet, musty odor. Burning taste. The average least detectable odor threshold concentration in water at 60 °C was 0.36 mg/L (Alexander et al., 1982). Experimentally determined detection and recognition odor threshold concentrations were 2.0 mg/m3 (660 ppbv) and 5.4 mg/m3 (1.8 ppmv), respectively (Hellman and Small, 1974). An odor threshold concentration of 11 ppbv was reported by Nagata and Takeuchi (1990).

Occurrence

Reported found in the essential oils of Java citronella, tea, Eucalyptus amygdalina. Also reported in apple and currant aromas; in apricots, banana, sweet cherry, orange, grapefruit and tangerine juice, berries, guava, grapes, melon, papaya, pear, pineapple, leek, peas, rutabaga, tomato, ginger, spearmint oil, vinegar, breads, cheeses, milk, fish oil, meats, hop oil, beer, cognac, rum, whiskies, sherry, cider, grape wines, cocoa, tea, coffee, nuts, oats, soybean, avocado, olive, passion fruit, plum, beans, mango, starfruit, bantu beer, plum brandy, tamarind, fig, cardamom, gin, quince, radish, prickly pear, litchi, sukiyaki, lovage leaf, buckwheat, sweet corn, laurel, malt, wort, elderberry juice, dried bonito, krill, kiwifruit, loquat, fruit brandies and wines, endive, shrimp, truffle, red currants, Roman chamomile oil and other sources.

Uses

Isobutyl Alcohol is a reagent used in organic reactions. It is used in the synthesis of new fluorinating reagents. It is also used in the lipase-catalyzed production of biodiesel as an energy source.

Uses

Isobutanol is commonly used to produce isobutyl acetate for lacquers, isobutylphthalate for plasticizers, and as a solvent for plastics, textiles, oils, and perfumes. It is also used in the production of fruit flavoring esters and as a solvent in paint and varnish removers.

Uses

2-Methyl-1-propanol (Isobutyl alcohol) may be used to prepare the isobutyl alcohol-benzene solution for use in the quantification of inorganic phosphates. It may be used for the estimation of phosphate (inorganic phosphorous) by a colorimetric method.

Production Methods

Isobutanol is commercially produced almost exclusively by the hydrogenation of isobutyraldehyde obtained from propylene using the oxo process.

Preparation

From isobutylene; by reduction of isobutyraldehyde with sodium amalgam or in the presence of a catalyst; by fermentation of isobutyraldehyde; isolated during fermentation of carbohydrates

Definition

ChEBI: Isobutanol is an alkyl alcohol that is propan-1-ol substituted by a methyl group at position 2. It has a role as a Saccharomyces cerevisiae metabolite. It is a primary alcohol and an alkyl alcohol. It derives from a hydride of an isobutane.

Aroma threshold values

Detection: 360 ppb to 3.3 ppm

General Description

A clear colorless liquid with a sweet odor. Flash point 85 - 100°F. Less dense than water. Vapors heavier than air.

Air & Water Reactions

Highly flammable. Soluble in water.

Reactivity Profile

2-Methyl-1-propanol is an alcohol. Flammable and/or toxic gases are generated by the combination of alcohols with alkali metals, nitrides, and strong reducing agents. They react with oxoacids and carboxylic acids to form esters plus water. Oxidizing agents convert them to aldehydes or ketones. Alcohols exhibit both weak acid and weak base behavior. They may initiate the polymerization of isocyanates and epoxides. 2-Methyl-1-propanol is incompatible with strong oxidizers.

Hazard

Flammable, moderate fire risk. Strong irritant.

Health Hazard

Inhalation causes eye and throat irritation andheadache. Ingestion may cause depression ofthe central nervous system. It is an irritantto the skin, causing cracking. Target organsare the eyes, skin, and respiratory system.
LD50 value, oral (rabbits): 3750 mg/kg.

Fire Hazard

HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.

Flammability and Explosibility

Flammable

Potential Exposure

Butyl alcohols are used as solvents for paints, lacquers, varnishes, natural and synthetic resins, gums, vegetable oils, dyes, camphor, and alkaloids. They are also used as an intermediate in the manufacture of pharmaceuticals and chemicals; in the manufacture of artificial leather, safety glass; rubber and plastic cements, shellac, raincoats, photographic films, perfumes; and in plastic fabrication.

Carcinogenicity

Nineteen Wistar rats were dosed with 0.2mL of isobutanol twice weekly by oral intubation. The average survival time was 495 days. It was reported that malignant tumors developed in three animals; one had a forestomach carcinoma and a liver cell carcinoma, another had a forestomach carcinoma and myelogenous leukemia, and the third, a myelogenous leukemia. In the same study, 24 rats were injected subcutaneously with 0.05 mL/kg twice weekly. The average survival time was 544 days. A total of eight malignant tumors developed: two forestomach carcinomas, two liver sarcomas, one spleen sarcoma, one mesothelioma, and two retroperitoneal sarcomas. Increased incidences of total tumors were observed by both routes of administration, but there was no significant increased incidence of any tumor type at any site. This study is considered inappropriate for cancer risk assessment.

Source

A product of whiskey fermentation (quoted, Verschueren, 1983). Isobutyl alcohol also occurs in tea leaves and java cintronella plants (Duke, 1992).

Shipping

UN1120 Butanols, Hazard Class: 3; Labels: 3— Flammable liquid. UN1212 Isobutanol or Isobutyl alcohol, Hazard Class: 3; Labels: 3—Flammable liquid

Purification Methods

Isobutanol is dried by refluxing with CaO and BaO for several hours, followed by treatment with calcium or aluminium amalgam, then fractional distilling it from sulfanilic or tartaric acids. More exhaustive purifications involve formation of phthalate or borate esters. Heating it with phthalic anhydride gives the acid phthalate which, after crystallisation to constant melting point (m 65o) from pet ether, is hydrolysed with aqueous 15% KOH. The alcohol is distilled off as the water azeotrope and dried (K2CO3, then anhydrous CuSO4), and finally magnesium turnings, followed by fractional distillation. [Hückel & Ackermann J Prakt Chem 136 15 1933.] The borate ester is formed by heating the dried alcohol for 6hours in an autoclave at 160-175o with a quarter of its weight of boric acid. After fractional distillation under vacuum, the ester is hydrolysed by heating for a short time with aqueous alkali and the alcohol is dried with CaO and distilled. [Michael et al. J Am Chem Soc 38 653 1916.] Alternatively dry the alcohol with K2CO3, CaSO4 or CaCl2, filter and fractionally distil it. For further drying, the redistilled alcohol can be refluxed with the appropriate alkyl phthalate or succinate as described under ethanol. [Beilstein 1 IV 1588.]

Incompatibilities

Butyl alcohols may form explosive mixture with air. In all cases they are 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. Attacks some plastics, rubber and coatings. n-Butanol is incompatible with strong acids; halogens, caustics, alkali metals; aliphatic amines; isocyanates. sec-Butanol forms an explosive peroxide in air. Ignites with chromium trioxide. Incompatible with strong oxidizers; strong acids; aliphatic amines; isocyanates, organic peroxides. tert-Butanol is incompatible with strong acids (including mineral acid), including mineral acids; strong oxidizers or caustics, aliphatic amines; isocyanates, alkali metals (i.e., lithium, sodium, potassium, rubidium, cesium, francium). isoButanol is incompatible with strong acids; strong oxidizers; caustics, aliphatic amines; isocyanates, alkali metals and alkali earth. May react with aluminum at high temperatur

Waste Disposal

Incineration, or bury absorbed waste in an approved land fill.

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

Raw materials

HEAVY CUT RESIDUE OIL Amalgam sodium 2-Ethylhexanol 2-Amino-3-chlorobenzoic acid PROPYLENE Butyraldehyde Hydrogen Methanol Isobutyraldehyde FUSEL OIL

Preparation Products

1-BUTENE 1-Chloro-2-methylpropane Ethinyl Estradiol Isobutyl methacrylate polyesters containing quarternary ammonium groups FEMA 2200 Isobutyl butyrate Phenylacetic acid isobutyl ester Quinacridone Isobutylparaben 1-Bromo-2-methylpropane Isobutyl iodide Isobutyl cinnamate L-Valine Potassium isobutylxanthate Pivalic acid Isobutyl 2-butenoate BEPRIDIL Isobutyl furfurylacetate N,N-DIPHENYLQUINACRIDONE Pigment Red 122 Musk ketone tert-Butyl peroxypivalate Diisobutyl phthalate Isobutyl propionate Isopentyl isobutyrate Dibutyl phthalate N,N'-Dimethylquinacridone Disperse Blue 3 Isobutyl isobutyrate Isobutyl salicylate Butylated Hydroxytoluene Sodium O-isobutyl dithiocarbonate Isobutyl acetate alpha-d-Glucopyranoside, beta-d-fructofuranosyl, octadecanoate Isobutylamine Isobutyl acetoacetate Solvent Green 5 Isobutyl hexanoate Isobutyronitrile
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2-Methyl-1-propanol Suppliers

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View Lastest Price from 2-Methyl-1-propanol manufacturers

Hebei Weibang Biotechnology Co., Ltd
Product
Isobutyl Alcohol 78-83-1
Price
US $1.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
10 mt
Release date
2024-10-30
Qingdao RENAS Polymer Material Co., Ltd.
Product
Isobutylalcohol 78-83-1
Price
US $0.00/kg
Min. Order
20kg
Purity
99.0%
Supply Ability
20 tons
Release date
2024-07-02
Qingdao RENAS Polymer Material Co., Ltd.
Product
2-Methyl-1-propanol 78-83-1
Price
US $0.00/kg
Min. Order
20kg
Purity
99%
Supply Ability
20 tons
Release date
2024-09-29

78-83-1, 2-Methyl-1-propanolRelated Search:

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  • 1-Hydroxymethylpropane
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  • 2-methylpropanoI
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  • isobutylalkohol(czech)
  • iso-C4H9OH
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  • Rcra waste number U140
  • rcrawastenumberu140
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