Methanol , StandardforGC,>99.9% , 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.) |
| Melting point: | -97,8°C |
| Boiling point: | 64,7°C |
| Boiling point: | 65.4 °C(lit.) |
| Density | 0.791 g/mL at 25 °C |
| Density | d = 0,89 |
| 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) |
| PH | 6.8 (20°C in H2O) |
| Flame Color | Pale blue |
| 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℃） |
| Cosmetics Ingredients Functions | SOLVENT FRAGRANCE DENATURANT |
| Cosmetic Ingredient Review (CIR) | Methanol (67-56-1) |
| InChI | 1S/CH4O/c1-2/h2H,1H3 |
| InChIKey | OKKJLVBELUTLKV-UHFFFAOYSA-N |
| SMILES | CO |
| LogP | -0.770 |
| Surface tension | 22.22mN/m at 298.15K |
| Surface tension | 22.7mN/m at 20°C |
| CAS DataBase Reference | 67-56-1(CAS DataBase Reference) |
| NIST Chemistry Reference | Methyl alcohol(67-56-1) |
| EPA Substance Registry System | Methanol (67-56-1) |
| Absorption | in accordance |
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.
Methanol has numerous uses. Its main use is in the production of formaldehyde, whichconsumes approximately 40% of methanol supplies. Methanolis a common organic solvent found in many products including deicers (windshield wiperfl uid), antifreezes, correction fl uid, fuel additives, paints, and other coatings. A number ofindustrial chemicals use methanol in their production. Among these are methyl methacrylateand dimethyl terephthalate. Methanol is used to convert methylacrylamide sulfate to methylmethacrylate and ammonium hydrogen sulfate (NH4HSO4):
Methanol is used in making the ester dimethyl terephthalate from mixtures ofxylene of toluene. Dimethyl terephthalate is used in the manufacture of polyesters and plastics.
Methanol is used as a fuel additive. The common gasoline additive HEET is pure methanoland is used as a gas-line antifreeze and water remover. Methanol is used as a fuel in camp stoves and small heating devices. It is used to fuel the small engines used in models (airplanes,boats). In the early history of automobiles,methanol was a common fuel. The availability of cheap gasoline replaced methanol in the1920s, but it is receiving renewed interest as an alternative fuel as the demand and cost of oilincrease and oil supplies become uncertain. Methanol can be produced from coal and biomass.Methanol has a higher octane rating and generally lower pollutant emissions compared togasoline. The relatively low flame temperature means that fewer nitrogen oxides are producedby methanol than by ethanol. One large disadvantage of methanol is that it has a lower energydensity than gasoline. Using equivalent volumes of gasoline and methanol, methanol givesabout half the mileage of gasoline. Another problem with methanol is its low vapor pressure,resulting in starting problems on cold days. This problem can be mitigated by using a blendof 85% methanol and 15% gasoline. This mixture is called M85 and is similar to E85 ethanol(see Ethyl Alcohol).
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 |
| target organs | Eyes,Central nervous system |
| 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 |
| RIDADR | UN 1170 3/PG 2 |
| OEB | A |
| OEL | TWA: 200 ppm (260 mg/m3), STEL: 250 ppm (325 mg/m3) [skin] |
| WGK Germany | 1 |
| RTECS | PC1400000 |
| F | 3-10 |
| Autoignition Temperature | 385 °C |
| TSCA | TSCA listed |
| HS Code | 2905 11 00 |
| HazardClass | 3 |
| PackingGroup | II |
| Storage Class | 3 - Flammable liquids |
| Hazard Classifications | Acute Tox. 3 Dermal Acute Tox. 3 Inhalation Acute Tox. 3 Oral Flam. Liq. 2 STOT SE 1 |
| Hazardous Substances Data | 67-56-1(Hazardous Substances Data) |
| 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 |
| Limited Quantities | 1.0 L (0.3 gallon) (liquid) |
| Excepted Quantities | Max Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml) |
