A5372312
2-Methyl-1-propanol , >99.0%(GC) , 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 | n |
| 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 |
