Methanol

CH4O

methanol

CAS67-56-1
GHS02 Gefahrensymbol: Entzündbar – Flamme
GHS06 Gefahrensymbol: Giftig – Totenkopf mit Knochen
GHS08 Gefahrensymbol: Gesundheitsgefahr – Gesundheitsgefahr
Danger

Consulting for Methanol

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Identification

CAS Number
67-56-1
EC Number
200-659-6
UN Number
1230
Index Number
603-001-00-X
PubChem CID
887

Physical-chemical properties

Molecular Formula
CH4O
Molar Mass
32.04 g/mol
IUPAC Name
methanol

Chemical Identifiers

InChI
InChI=1S/CH4O/c1-2/h2H,1H3
InChI Key
OKKJLVBELUTLKV-UHFFFAOYSA-N

Overview

Methanol (CAS 67-56-1) is a primary alcohol and the simplest aliphatic alcohol with high flammability and significant toxicity properties. This essential industrial chemical, also known as methyl alcohol or wood alcohol, serves as a fundamental building block in numerous chemical processes and manufacturing applications. With the molecular formula CH4O and a molecular weight of 32.042 g/mol, methanol exhibits distinctive properties that make it both valuable and hazardous in industrial settings. Methanol presents significant safety considerations due to its classification under multiple hazard categories. It is classified as a flammable liquid (Flam. Liq. 2) with acute toxicity through oral, dermal, and inhalation routes (Acute Tox. 3), and causes specific target organ toxicity (STOT SE 1). The substance requires careful handling protocols, as indicated by its "Danger" signal word and associated GHS pictograms including flame, skull and crossbones, and health hazard symbols. Its ADR classification as Class 3 reflects its flammable nature during transportation. The chemical finds extensive application in industrial manufacturing, particularly as a solvent and feedstock for producing formaldehyde, acetic acid, and various methyl esters. It serves as an essential component in the production of biodiesel through transesterification processes and as an antifreeze agent in industrial applications. Unlike more complex solvents such as 2-ethoxyethanol, methanol's simple structure enables rapid biodegradation while maintaining excellent solvent properties. Key safety measures include adequate ventilation, appropriate personal protective equipment, and strict adherence to storage requirements due to its volatile and toxic nature. The substance's miscibility with water and most organic solvents enhances its utility but requires careful consideration of compatibility with other chemicals. OYSI provides high-quality methanol to meet diverse industrial requirements across European markets.

Safety & Classification

Danger
Classification:

Flam. Liq. 2; Acute Tox. 3 *; Acute Tox. 3 *; Acute Tox. 3 *; STOT SE 1

HHazard Statements (H-Statements)

Describe the nature and severity of the hazard

H225

Highly flammable liquid and vapour.

H331

Toxic if inhaled.

H311

Toxic in contact with skin.

H301

Toxic if swallowed.

H370

Causes damage to organs.

Classification according to CLP Regulation (EC) No 1272/2008. The complete list of hazard and precautionary statements can be found in the Safety Data Sheet (SDS).

First Aid Measures

Inhalation

Toxic

Measures if vapours or dust are inhaled

First Aid Actions

  • +P304IF INHALED:
  • +P340Remove person to fresh air and keep comfortable for breathing.
  • +P311Call a POISON CENTER/doctor.

Related hazard statements:

Skin Contact

Toxic

Measures if substance contacts the skin

First Aid Actions

  • +P302IF ON SKIN:
  • +P352Wash with plenty of water.
  • +P361Take off immediately all contaminated clothing.
  • +P313Get medical advice/attention.

Related hazard statements:

Ingestion

Toxic

Measures if substance is accidentally swallowed

First Aid Actions

  • +P301IF SWALLOWED:
  • +P330Rinse mouth.
  • +P331Do NOT induce vomiting.
  • +P310Immediately call a POISON CENTER/doctor.

Related hazard statements:

General Measures

Emergency 112 | Poison Control: +49 30 19240 (DE), +33 1 45 42 59 59 (FR), +31 30 274 88 88 (NL)

First aid measures are based on CLP classification and associated P-statements. They do not replace the Safety Data Sheet (SDS). In case of emergency, always consult the full SDS and a physician.

Transport (ADR)

UN Number1230
ADR Class3
Packing GroupII
Tunnel CodeD/E
Proper Shipping NameMethanol
Marine PollutantNo

Frequently Asked Questions

What is methanol?

Methanol is a simple alcohol with the chemical formula CH4O and CAS number 67-56-1. It is the simplest alcohol consisting of a methyl group linked to a hydroxyl group, with a molecular weight of 32.042 g/mol. Methanol is classified as a flammable liquid and toxic substance, requiring careful handling due to its hazardous properties including acute toxicity and specific target organ toxicity.

What are the physicochemical properties of methanol?

Methanol is a colorless, volatile liquid at room temperature with a characteristic alcoholic odor. It is completely miscible with water and most organic solvents, making it an excellent solvent. The substance has a low boiling point of 64.7°C and a flash point of 11°C, contributing to its classification as a flammable liquid. Its low molecular weight and polar nature give it high volatility and solubility characteristics.

What is methanol used for?

Methanol serves primarily as a chemical feedstock for producing formaldehyde, acetic acid, and methyl tertiary-butyl ether (MTBE). It is widely used as an industrial solvent, antifreeze component, and fuel additive. In manufacturing, methanol is essential for producing plastics, paints, varnishes, and adhesives. It also finds applications in the pharmaceutical industry as a reaction medium and in laboratory settings as an analytical solvent.

How to handle methanol safely?

Methanol requires strict safety measures due to its flammable and toxic nature. Personal protective equipment must include chemical-resistant gloves, safety goggles, and adequate ventilation or respiratory protection. Work should be conducted away from ignition sources, heat, and sparks. Given its acute toxicity classification, avoid skin contact, inhalation, and ingestion. Emergency eyewash stations and safety showers should be readily accessible in work areas.

How to store methanol correctly?

Methanol must be stored in cool, dry, well-ventilated areas away from heat sources, sparks, and open flames. Storage containers should be tightly sealed and made of compatible materials. Keep separate from oxidizing agents and incompatible substances. Storage areas require appropriate fire suppression systems due to the flammable liquid classification. Temperature should be maintained below 25°C when possible, and storage areas must comply with local fire safety regulations.

What to do in case of contact with methanol?

Methanol exposure requires immediate first aid measures. For skin contact, remove contaminated clothing and wash thoroughly with soap and water for at least 15 minutes. In case of eye contact, rinse immediately with clean water for 15-20 minutes and seek medical attention. If inhaled, move to fresh air immediately. For ingestion, do not induce vomiting and seek immediate medical attention due to methanol's high toxicity and potential for serious health effects.

How to dispose of methanol properly?

Methanol disposal must comply with local and European waste regulations as hazardous chemical waste. The substance cannot be disposed of in regular drains or municipal waste systems. Disposal should be conducted through licensed hazardous waste contractors who can handle flammable and toxic materials appropriately. Recovery or incineration in authorized facilities is typically required. Always consult local environmental authorities for specific disposal requirements and approved waste management facilities.

How to transport methanol?

Methanol is classified under ADR regulations as Class 3 (flammable liquid), Packing Group II, requiring specific transport protocols. Packaging must meet UN specifications for dangerous goods, and vehicles must carry appropriate hazard placards and documentation. Drivers require ADR training certification for transporting dangerous goods. Transport containers must be properly labeled with GHS pictograms (GHS02, GHS06, GHS08) and the danger signal word as required by regulations.

Is methanol subject to particular regulations?

Methanol is subject to comprehensive European chemical regulations including REACH registration and CLP classification requirements. It is not currently listed as a Substance of Very High Concern (SVHC) but requires safety data sheets and proper labeling due to its hazardous classification. Industrial users must comply with occupational exposure limits, workplace safety regulations, and environmental discharge controls. Import and distribution require appropriate chemical handling licenses and regulatory compliance.

Where to buy methanol in Europe?

Methanol is available throughout Europe through specialized chemical distributors like OYSI, which provides reliable supply chains for industrial customers. OYSI offers methanol in various packaging options suitable for different industrial applications, ensuring compliance with European quality standards and regulations. As a European chemical distributor, OYSI can provide technical support, safety documentation, and regulatory guidance along with reliable delivery across European markets for professional and industrial users.

Data Sources

Classification per CLP Regulation (EC) No 1272/2008. Data from ECHA and PubChem.