Methanol , AR,99.5% , 67-56-1
Synonym(s):
Methanol;Methyl alcohol;Methanol in DMSO;Methanol solution;Methanol ZerO2
CAS NO.：67-56-1
Empirical Formula: CH4O
Molecular Weight: 32.04
MDL number: MFCD00004595
EINECS: 200-659-6
PRODUCT Properties
| Melting point: | -98 °C(lit.) |
| Boiling point: | 65.4 °C(lit.) |
| Density | 0.791 g/mL at 25 °C |
| vapor density | 1.11 (vs air) |
| vapor pressure | 410 mm Hg ( 50 °C) |
| refractive index | n |
| Flash point: | 52 °F |
| storage temp. | 2-8°C |
| solubility | benzene: miscible(lit.) |
| pka | 15.2(at 25℃) |
| form | Liquid Free From Particulates |
| Specific Gravity | 0.793 (20/20℃) |
| color | <10(APHA) |
| Odor | Faint alcohol odor detectable at 4 to 6000 ppm (mean = 160 ppm) |
| Relative polarity | 0.762 |
| explosive limit | 5.5-44%(V) |
| Odor Threshold | 33ppm |
| Water Solubility | miscible |
| λmax | λ: 210 nm Amax: 0.50 λ: 220 nm Amax: 0.30 λ: 230 nm Amax: 0.15 λ: 235 nm Amax: 0.10 λ: 240 nm Amax: 0.05 λ: 260 nm Amax: 0.01 λ: 400 nm Amax: 0.01 |
| Merck | 14,5957 |
| BRN | 1098229 |
| Henry's Law Constant | 4.99 at 25 °C (headspace-GC, Gupta et al., 2000) |
| Exposure limits | TLV-TWA (200 ppm) (ACGIH), 260mg/m3, 1040mg/m3 (800 ppm) 15minutes (NIOSH); STEL 310mg/m3 (250 ppm); IDLH 25,000 ppm (NIOSH). |
| Dielectric constant | 33.6（20℃） |
| LogP | -0.770 |
Description and Uses
Methyl alcohol, also known as methanol or wood alcohol, is a clear, colorless, flammable liquid
that is the simplest alcohol.
World production of methanol is approximately 8.5 billion gallons annually. Methanol
is produced industrially, starting with the production of synthesis gas or syngas. Syngas used
in the production of methyl alcohol is a mixture of carbon monoxide and hydrogen formed
when natural gas reacts with steam or oxygen. Methyl alcohol is then synthesized
from carbon monoxide and hydrogen.
Methyl alcohol is poisonous and is commonly used to denature ethyl alcohol. Methanol
poisoning results from ingestion, inhalation of methanol vapors, or absorption through
the skin. Methanol is transformed in the body to formaldehyde (H2CO) by the enzyme
alcohol dehydrogenase.The formaldehyde is then metabolized to formic acid (HCOOH)by aldehyde dehydrogenase.
high purity grade for ICP-MS detection
Safety
| Symbol(GHS) |    GHS02,GHS06,GHS08 |
| Signal word | Danger |
| Hazard statements | H225-H301+H311+H331-H370 |
| Precautionary statements | P210-P280-P301+P310+P330-P302+P352+P312-P304+P340+P311 |
| Hazard Codes | Xn,T,F |
| Risk Statements | 10-20/21/22-68/20/21/22-39/23/24/25-23/24/25-11-40-36-36/38-23/25 |
| Safety Statements | 36/37-7-45-16-24/25-23-24-26 |
| OEB | A |
| OEL | TWA: 200 ppm (260 mg/m3), STEL: 250 ppm (325 mg/m3) [skin] |
| RIDADR | UN 1170 3/PG 2 |
| WGK Germany | 1 |
| RTECS | PC1400000 |
| F | 3-10 |
| Autoignition Temperature | 385 °C |
| TSCA | Yes |
| HS Code | 2905 11 00 |
| HazardClass | 3 |
| PackingGroup | II |
| Toxicity | LD50 oral (rat) 5628 mg/kg LD50 skin (rabbit) 15,840 mg/kg LC50 inhal (rat) >145,000 ppm (1 h) PEL (OSHA) 200 ppm (260 mg/m3) TLV-TWA (ACGIH) 200 ppm (260 mg/m3)—skin STEL (ACGIH) 250 ppm (328 mg/m3) |
| IDLA | 6,000 ppm |
