2-methoxyacetic acid

C3H6O3

CAS625-45-6
GHS08 Gefahrensymbol: Gesundheitsgefahr – Gesundheitsgefahr
GHS07 Gefahrensymbol: Gesundheitsschädlich/Reizend – Ausrufezeichen
GHS05 Gefahrensymbol: Ätzend – Ätzwirkung
Danger

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Identification

CAS Number
625-45-6
EC Number
210-894-6
UN Number
3265
Index Number
607-312-00-1
PubChem CID
12251

Physical-chemical properties

Molecular Formula
C3H6O3
Molar Mass
90.08 g/mol
IUPAC Name
2-methoxyacetic acid

Chemical Identifiers

InChI
InChI=1S/C3H6O3/c1-6-2-3(4)5/h2H2,1H3,(H,4,5)
InChI Key
RMIODHQZRUFFFF-UHFFFAOYSA-N

Overview

2-methoxyacetic acid (CAS 625-45-6) is an organic carboxylic acid derivative with methoxy substitution and significant toxicological properties requiring careful handling protocols. This colorless liquid compound, with molecular formula C3H6O3 and molar mass of 90.08 g/mol, belongs to the family of substituted acetic acids where a methoxy group (-OCH3) replaces one hydrogen atom on the methyl carbon. The substance presents significant safety considerations due to its classification as a reproductive toxicant (Repr. 1B), acute toxin (Acute Tox. 4), and skin corrosive material (Skin Corr. 1B), requiring "Danger" signal word labeling with GHS pictograms GHS08, GHS07, and GHS05. The compound's hazard profile necessitates stringent handling procedures, appropriate personal protective equipment, and controlled storage conditions. Its corrosive nature can cause severe skin burns and eye damage, while its reproductive toxicity classification indicates potential harm to fertility and unborn children. Transportation falls under ADR Class 8 (corrosive substances), requiring specialized packaging and documentation. In industrial applications, 2-methoxyacetic acid serves as an important intermediate in pharmaceutical synthesis, particularly in the production of active pharmaceutical ingredients where controlled reactivity is essential. It also finds use in specialty chemical manufacturing and as a reagent in organic synthesis processes. Unlike simpler compounds such as ethane-1,2-diamine, this acid derivative offers specific reactivity patterns valuable in targeted synthetic pathways. The substance requires specialized handling expertise and regulatory compliance, making it suitable primarily for professional industrial users with appropriate safety infrastructure. OYSI provides 2-methoxyacetic acid to qualified industrial customers with comprehensive safety documentation and technical support.

Safety & Classification

Danger
Classification:

Repr. 1B; Acute Tox. 4 *; Skin Corr. 1B

HHazard Statements (H-Statements)

Describe the nature and severity of the hazard

H302

Harmful if swallowed.

H314

Causes severe skin burns and eye damage.

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

Skin Contact

Harmful

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:

Eye Contact

Harmful

Measures if substance gets into the eyes

First Aid Actions

  • +P305IF IN EYES:
  • +P351Rinse cautiously with water for several minutes.
  • +P338Remove contact lenses, if present and easy to do. Continue rinsing.
  • +P313Get medical advice/attention.

Related hazard statements:

Ingestion

Harmful

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 Number3265
ADR Class8
Packing GroupI
Tunnel CodeE
Proper Shipping NameMethoxyessigsäure
Marine PollutantNo

Frequently Asked Questions

What is 2-methoxyacetic acid?

2-methoxyacetic acid is an organic compound with the molecular formula C3H6O3 and CAS number 625-45-6. It belongs to the carboxylic acid family and contains a methoxy group (-OCH3) attached to the alpha carbon. With a molecular weight of 90.08 g/mol, this substance is classified as highly hazardous due to its reproductive toxicity, acute toxicity, and corrosive properties. It requires careful handling and is subject to strict safety regulations in industrial applications.

What are the physicochemical properties of 2-methoxyacetic acid?

2-methoxyacetic acid is typically a colorless to pale yellow liquid at room temperature with a characteristic acidic odor. As a carboxylic acid, it is highly soluble in water and polar organic solvents due to its hydrophilic methoxy and carboxyl groups. The compound exhibits corrosive properties, which contributes to its Skin Corr. 1B classification. Its relatively low molecular weight and polar nature make it readily absorbed through biological membranes.

What is 2-methoxyacetic acid used for?

2-methoxyacetic acid is primarily used as a chemical intermediate in pharmaceutical synthesis and specialty chemical manufacturing. It serves as a building block for various organic compounds and may be employed in research and development applications. Due to its high toxicity profile, particularly its reproductive toxicity (Repr. 1B), its use is heavily restricted and limited to specialized industrial processes where strict safety protocols can be maintained and alternative substances are not viable.

How to handle 2-methoxyacetic acid safely?

2-methoxyacetic acid requires maximum protection during handling due to its corrosive and toxic properties. Essential PPE includes chemical-resistant gloves, full face protection, and acid-resistant clothing. Work must be conducted in well-ventilated areas or under fume extraction systems to prevent inhalation. Given its Repr. 1B classification, pregnant women and those planning pregnancy should avoid any contact. Emergency shower and eyewash stations must be immediately accessible, and trained personnel should supervise all handling operations.

How to store 2-methoxyacetic acid correctly?

2-methoxyacetic acid must be stored in tightly sealed, corrosion-resistant containers in a cool, dry, well-ventilated area away from heat sources and incompatible materials. As a corrosive substance (ADR Class 8, Group I), it requires specialized storage conditions with appropriate containment systems to prevent leaks. Storage areas should be clearly marked, access-restricted, and equipped with emergency response equipment. Regular container inspections are essential due to the corrosive nature of the substance.

What to do in case of contact with 2-methoxyacetic acid?

2-methoxyacetic acid contact requires immediate emergency response due to its corrosive properties. For skin contact, immediately remove contaminated clothing and flush the affected area with copious amounts of water for at least 15 minutes. Eye contact requires immediate irrigation with water or saline solution for at least 15 minutes while holding eyelids open. If inhaled, move the person to fresh air immediately. Seek immediate medical attention in all cases, informing medical personnel of the substance's reproductive toxicity and corrosive nature.

How to dispose of 2-methoxyacetic acid properly?

2-methoxyacetic acid disposal must comply with hazardous waste regulations due to its toxic and corrosive classification. The substance cannot be disposed of through normal waste streams and requires specialized hazardous waste treatment facilities. Containers must be properly labeled and handled by licensed waste management companies. Due to its reproductive toxicity, special precautions apply during the disposal process. Always consult local environmental authorities and follow national waste disposal regulations for corrosive and toxic substances.

How to transport 2-methoxyacetic acid?

2-methoxyacetic acid is classified under ADR Class 8 (corrosive substances), Packaging Group I, indicating maximum danger level for transport. Transportation requires specialized corrosion-resistant packaging, proper labeling with GHS pictograms (GHS08, GHS07, GHS05), and documentation including safety data sheets. Vehicles must carry appropriate emergency equipment and drivers need hazardous materials certification. The transport must comply with ADR regulations for corrosive substances, including route restrictions and emergency response procedures.

Is 2-methoxyacetic acid subject to specific regulations?

2-methoxyacetic acid is subject to extensive regulatory oversight under REACH, CLP, and national chemical safety legislation. Its Repr. 1B classification triggers strict authorization requirements and use restrictions. The substance requires safety data sheets, hazard communication, and may be subject to occupational exposure limits. Companies must comply with notification requirements and risk assessment obligations. Due to its high toxicity profile, additional workplace health surveillance and environmental monitoring may be mandatory depending on jurisdiction and application.

Where to buy 2-methoxyacetic acid in Europe?

2-methoxyacetic acid is available through OYSI, a specialized European distributor of technical chemicals. As a highly regulated substance with Repr. 1B classification, procurement requires verification of legitimate use, proper safety protocols, and regulatory compliance. OYSI provides comprehensive documentation including safety data sheets, certificates of analysis, and regulatory guidance. Due to the substance's hazardous nature, purchases are typically restricted to qualified industrial users with appropriate handling facilities and safety expertise.

Data Sources

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