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 the simplest primary alcohol with the molecular formula CH4O, serving as a fundamental chemical building block in industrial applications. This colorless, volatile liquid represents one of the most important basic chemicals in modern industry, with a molecular weight of 32.042 g/mol. Also known by its IUPAC name methanol, this compound plays a crucial role in chemical manufacturing processes worldwide. Its simple molecular structure, consisting of a single carbon atom bonded to three hydrogen atoms and one hydroxyl group, makes it an extremely versatile chemical intermediate. The substance exhibits significant safety considerations due to its classification under multiple hazard categories. Methanol presents as a Category 2 flammable liquid with high acute toxicity risks through ingestion, inhalation, and dermal contact. The GHS02, GHS06, and GHS08 pictograms indicate its flammable nature, acute toxicity, and potential for serious health effects including specific target organ toxicity. Its ADR Class 3 classification requires specialized handling and transportation protocols to ensure worker safety and regulatory compliance. Key industrial applications include its use as a chemical feedstock for formaldehyde production, as a solvent in various manufacturing processes, and as a fuel additive or alternative fuel source. The chemical industry also utilizes methanol in the synthesis of acetic acid, methyl tert-butyl ether, and various methylated compounds. Unlike more complex chemicals such as 2-ethoxyethanol, methanol's simple structure allows for efficient large-scale production and purification. Methanol requires careful handling procedures due to its toxic properties and flammability characteristics. Proper ventilation, personal protective equipment, and adherence to established safety protocols are essential for safe industrial use. OYSI maintains reliable supplies of technical-grade methanol to support diverse European industrial requirements.

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 molecular weight of 32.042 g/mol. It is the simplest alcohol consisting of a methyl group linked to a hydroxyl group. Methanol is a colorless, volatile liquid that is highly flammable and toxic to humans. It is classified as a dangerous substance with multiple hazard classes including flammable liquid category 2 and acute toxicity category 3 for various exposure routes.

What are the physicochemical properties of methanol?

Methanol is a colorless, volatile liquid at room temperature with a characteristic alcoholic odor. It has a molecular formula of CH4O and a molecular weight of 32.042 g/mol. Methanol is completely miscible with water and most organic solvents. It has a low boiling point of 64.7°C and a flash point of 11°C, making it highly flammable. The substance readily evaporates at room temperature and burns with a nearly invisible flame.

What is methanol used for?

Methanol is primarily used as a chemical feedstock in the production of formaldehyde, acetic acid, and methyl tert-butyl ether (MTBE). It serves as a solvent in various industrial processes and as an antifreeze agent in automotive applications. Methanol is also used in the production of biodiesel through transesterification processes and as a fuel additive. Additionally, it finds applications in the pharmaceutical industry and as a denaturant for ethanol.

How to handle methanol safely?

Methanol requires strict safety measures due to its high toxicity and flammability. Personal protective equipment must include chemical-resistant gloves, safety goggles, and appropriate respiratory protection in poorly ventilated areas. Work should be conducted in well-ventilated spaces away from ignition sources. Avoid skin contact and inhalation of vapors. Emergency eyewash stations and safety showers should be readily accessible. Only trained personnel should handle this substance following established safety protocols.

How to store methanol correctly?

Methanol must be stored in a cool, dry, well-ventilated area away from heat sources, sparks, and open flames. Storage containers should be made of compatible materials such as stainless steel or certain plastics. Keep containers tightly closed and grounded to prevent static electricity buildup. Store separately from oxidizing agents and incompatible materials. Storage areas should be equipped with appropriate fire suppression systems and spill containment measures.

What to do in case of contact with methanol?

Methanol exposure requires immediate action due to its high toxicity. For skin contact, remove contaminated clothing and wash the affected area thoroughly with soap and water for at least 15 minutes. In case of eye contact, flush immediately with clean water for at least 15 minutes. If inhaled, move the person to fresh air immediately. For ingestion, do not induce vomiting and seek immediate medical attention. Contact poison control or emergency services promptly for any significant exposure.

How to dispose of methanol appropriately?

Methanol disposal must comply with local and national hazardous waste regulations. The substance cannot be disposed of in regular waste streams or poured down drains due to its toxicity and environmental impact. Disposal should be handled by licensed hazardous waste management companies that can ensure proper treatment or incineration at high temperatures. Small quantities may be recovered through distillation for reuse. Always consult local environmental authorities for specific disposal requirements.

How to transport methanol?

Methanol is classified as ADR Class 3 (flammable liquid), Packing Group II, requiring specific transport regulations compliance. Packages must be properly labeled with appropriate hazard pictogrammes (GHS02, GHS06, GHS08) and carry the 'Danger' signal word. Transport vehicles must be equipped with appropriate safety equipment and drivers must hold ADR certification. Proper shipping documentation including safety data sheets must accompany shipments. Transport containers must meet UN specification requirements for dangerous goods.

Is methanol subject to specific regulations?

Methanol is subject to comprehensive European regulations including REACH registration requirements and CLP classification as a dangerous substance. It carries multiple hazard classifications: Flammable Liquid Category 2, Acute Toxicity Category 3 for multiple exposure routes, and Specific Target Organ Toxicity Category 1. The substance is not currently listed as a Substance of Very High Concern (SVHC). Users must comply with workplace exposure limits and implement appropriate risk management measures according to safety data sheets.

Where to buy methanol in Europe?

Methanol is available through OYSI, a specialized European distributor of technical chemicals. OYSI provides methanol to industrial customers across Europe, ensuring compliance with all relevant safety and regulatory requirements. As a professional chemical distributor, OYSI can supply appropriate grades of methanol along with comprehensive safety documentation and technical support. Contact OYSI directly for availability, specifications, and delivery options tailored to your specific industrial requirements and location within Europe.

Data Sources

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