വിക്കിപീഡിയ

മെഥനോൾ

രാസ സംയുക്തം
മെന്തോൾ  എന്ന ലേഖനവുമായി ആശയക്കുഴപ്പം ഒഴിവാക്കുക.  

CH3OH എന്ന തന്മാത്രാ ഘടനയുള്ള രാസവസ്തുവാണ് മെഥനോൾ, ( മീഥൈൽ ആൽക്കഹോൾ / വുഡ് ആൽക്കഹോൾ / വുഡ് നാഫ്ത / വൂഡ് സ്പിരിറ്റ്) [17]

മെഥനോൾ
Space filling model of methanol
Space filling model of methanol
Ball and stick model of methanol
Ball and stick model of methanol
A sample of methanol
Names
Preferred IUPAC name
Methanol[1]
Other names
Carbinol
Columbian spirits
Hydroxymethane
MeOH
Methyl alcohol
Methyl hydrate
Methyl hydroxide
Methylic alcohol
Methylol
Methylene hydrate, primary alcohol
Pyroligneous spirit
Wood alcohol
Wood naphtha
Wood spirit
Identifiers
3D model (JSmol)
3DMet
Beilstein Reference 1098229
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.000.599 വിക്കിഡാറ്റയിൽ തിരുത്തുക
EC Number
  • 200-659-6
Gmelin Reference 449
KEGG
MeSH {{{value}}}
RTECS number
  • PC1400000
UNII
UN number 1230
InChI
 
SMILES
 
Properties
തന്മാത്രാ വാക്യം
Molar mass 0 g mol−1
Appearance Colourless liquid
Odor Faint and similar to ethanol
സാന്ദ്രത 0.792 g/cm3[2]
ദ്രവണാങ്കം
ക്വഥനാങ്കം
miscible
log P −0.69
ബാഷ്പമർദ്ദം 13.02 kPa (at 20 °C)
അമ്ലത്വം (pKa) 15.5[3]
Conjugate acid Methyloxonium[4]
Conjugate base Methanolate[5]
−21.40·10−6 cm3/mol
Refractive index (nD) 1.33141[6]
വിസ്കോസിറ്റി 0.545 mPa·s (at 25 °C)[7]
1.69 D
Hazards[12][13]
Main hazards Methanol and its vapours are flammable.

Moderately toxic for small animals – Highly toxic to large animals and humans (in high concentrations) – May be fatal/lethal or cause blindness and damage to the liver, kidneys, and heart if swallowed – Toxicity effects from repeated over exposure have an accumulative effect on the central nervous system, especially the optic nerve – Symptoms may be delayed, become severe after 12 to 18 hours, and linger for several days after exposure[9]

Safety data sheet [1]
GHS pictograms GHS02: FlammableGHS06: ToxicGHS08: Health hazard[8]
GHS Signal word Danger[8]
H225, H301, H302, H305, H311, H331, H370[8]
P210, P233, P240, P241, P242, P243, P260, P264, P270, P271, P280, P301+330+331, P310, P302+352, P312, P303+361+353, P304+340, P311, P305+351+338, P307+311, P337+313, P361, P363, P370+378, P403+233[8]
Flash point {{{value}}}
Explosive limits 6–36%[10]
Lethal dose or concentration (LD, LC):
5628 mg/kg (rat, oral)
7300 mg/kg (mouse, oral)
12880 mg/kg (rat, oral)
14200 mg/kg (rabbit, oral)[11]
64,000 ppm (rat, 4 h)[11]
33,082 ppm (cat, 6 h)
37,594 ppm (mouse, 2 h)[11]
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 200 ppm (260 mg/m3)[10]
REL (Recommended)
 TWA 200 ppm (260 mg/m3) ST 250 ppm (325 mg/m3) [skin][10]
IDLH (Immediate danger)
 6000 ppm[10]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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അവലംബം

തിരുത്തുക
  1. ↑ Nomenclature of Organic Chemistry: IUPAC Recommendations and Preferred Names 2013 (Blue Book). Cambridge: The Royal Society of Chemistry. 2014. p. 692. doi:10.1039/9781849733069-00648. ISBN 978-0-85404-182-4.
  2. ↑ Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.
  3. ↑ Ballinger, P.; Long, F. A. (1960). "Acid Ionization Constants of Alcohols. II. Acidities of Some Substituted Methanols and Related Compounds". J. Am. Chem. Soc. 82 (4): 795–798. doi:10.1021/ja01489a008.
  4. ↑ "Methyloxonium". pubchem.ncbi.nlm.nih.gov. Archived from the original on 21 ഡിസംബർ 2018. Retrieved 21 ഡിസംബർ 2018.
  5. ↑ "Methanolate". pubchem.ncbi.nlm.nih.gov. Archived from the original on 21 ഡിസംബർ 2018. Retrieved 21 ഡിസംബർ 2018. Methoxide is an organic anion that is the conjugate base of methanol. ... It is a conjugate base of a methanol.
  6. ↑ "RefractiveIndex.INFO – Refractive index database". refractiveindex.info. Archived from the original on 23 ഫെബ്രുവരി 2017. Retrieved 14 ഫെബ്രുവരി 2012.
  7. ↑ González, Begoña (2007). "Density, dynamic viscosity, and derived properties of binary mixtures of methanol or ethanol with water, ethyl acetate, and methyl acetate at T = (293.15, 298.15, and 303.15) K". The Journal of Chemical Thermodynamics. 39 (12): 1578–1588. Bibcode:2007JChTh..39.1578G. doi:10.1016/j.jct.2007.05.004.
  8. ↑ 8.0 8.1 8.2 8.3 "Methanol" (PDF). Lab Chem. Valtech. Archived (PDF) from the original on 10 മാർച്ച് 2016. Retrieved 10 മാർച്ച് 2016.
  9. ↑ Toxicity on PubChem Archived 20 August 2018 at the Wayback Machine.
  10. ↑ 10.0 10.1 10.2 10.3 "NIOSH Pocket Guide to Chemical Hazards #0397". National Institute for Occupational Safety and Health (NIOSH).
  11. ↑ 11.0 11.1 11.2 "Methanol". Immediately Dangerous to Life and Health. National Institute for Occupational Safety and Health (NIOSH).
  12. ↑ 12.0 12.1 "The Emergency Response Safety and Health Database: Systematic Agent: METHANOL". Centers for Disease Control and Prevention. Archived from the original on 23 ഏപ്രിൽ 2009. Retrieved 3 ഓഗസ്റ്റ് 2018.
  13. ↑ "PubChem: Safety and Hazards - GHS Classification". National Center for Biotechnology Information, U.S. National Library of Medicine. Archived from the original on 20 ഓഗസ്റ്റ് 2018. Retrieved 20 ഓഗസ്റ്റ് 2018.
  14. ↑ "Methanol Safe Handling Manual" (PDF). Methanol Institute. 2017. p. 253. Archived (PDF) from the original on 20 ഡിസംബർ 2017. Retrieved 3 ഓഗസ്റ്റ് 2018.
  15. ↑ "Technical Information & Safe Handling Guide for Methanol". Methanex Corporation. Archived from the original on 11 മാർച്ച് 2012.
  16. ↑ "Methanol Safe Handling Manual" (PDF). Methanol Institute. 2017. p. 243. Archived (PDF) from the original on 20 ഡിസംബർ 2017. Retrieved 3 ഓഗസ്റ്റ് 2018.
  17. ↑ https://en.wikipedia.org/wiki/Methanol
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