Home Categories Organic Chemistry 2-Methyl-1-propanol
A5372412

2-Methyl-1-propanol , CP,98% , 78-83-1

Synonym(s):
2-Methyl-1-propanol;Isobutanol;Isobutanol, 2-Methyl-1-propanol, 2-methyl-1-propanol;Isobutyl Alcohol;Isobutylalcohol, 2-Methyl-1-propanol, Iso-Butanol

CAS NO.:78-83-1

Empirical Formula: C4H10O

Molecular Weight: 74.12

MDL number: MFCD00004740

EINECS: 201-148-0

Update time: 2022-07-08

PRODUCT Properties

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
Relative polarity 0.552
PH 7 (80g/l, H2O, 20℃)
Odor Slightly suffocating; nonresidual alcoholi
Odor Threshold 0.011ppm
explosive limit 1.5-12%(V)
Odor Type ethereal
Water Solubility  95 g/L (20 ºC)
λmax λ: 260 nm Amax: 0.10
λ: 280 nm Amax: 0.06
Merck  14,5131
JECFA Number 251
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℃

Description and Uses

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.

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.

Safety

Symbol(GHS) 
GHS02,GHS05,GHS07
Signal word  Danger
Hazard statements  H226-H315-H318-H335-H336
Precautionary statements  P210-P233-P240-P280-P303+P361+P353-P305+P351+P338
Hazard Codes  Xi
Risk Statements  10-37/38-41-67
Safety Statements  13-26-37/39-46-7/9
OEB A
OEL TWA: 50 ppm (150 mg/m3)
RIDADR  UN 1212 3/PG 3
WGK Germany  1
RTECS  NP9625000
Autoignition Temperature 801 °F
TSCA  Yes
HazardClass  3
PackingGroup  III
HS Code  29051990
Toxicity LD50 orally in rats: 2.46 g/kg (Smyth)
IDLA 1,600 ppm

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