Oxalic acid monoethyl ester
Oxalic acid monoethyl ester (CAS 617-37-8), with the molecular formula C4H6O4 and a molecular weight of 118.09 g/mol, is a versatile organic compound. It serves as a key building block in chemical synthesis, particularly within the realms of ester and carboxylic acid chemistry. Its utility spans across various organic transformations and the development of more complex molecules.
- IUPAC
- Monoethyl oxalate
- Synonyms
- Monoethyl oxalate

Organic Synthesis Intermediate
Oxalic acid monoethyl ester is a valuable intermediate in the synthesis of various organic compounds. It is frequently employed in reactions requiring a functionalised oxalate moiety.
Building Block for Heterocycles
This compound can be utilised as a precursor for the construction of diverse heterocyclic ring systems, which are prevalent in pharmaceuticals and agrochemicals.
Reagent in Chemical Research
It serves as a reagent in academic and industrial research laboratories for exploring new synthetic pathways and developing novel chemical entities.
| Molecular weight | 118.09 |
|---|---|
| Empirical formula | C4H6O4 |
| Assay | 97.5-102.5% (T)98% |
| Refractive index | n20/D 1.424 |
| Storage temperature | −20°C |

Hazard statements
- H319Causes serious eye irritation
- H334May cause allergy or asthma symptoms if inhaled
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
- P342
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36-43 |
| Safety statements (S) | 26-36/37 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Oxalic acid monoethyl ester primarily used for?
+
Oxalic acid monoethyl ester is primarily used as an intermediate and building block in organic synthesis and chemical research.
What are the CAS number and molecular formula for Oxalic acid monoethyl ester?
+
The CAS number for Oxalic acid monoethyl ester is 617-37-8, and its molecular formula is C4H6O4.
What grade and purity does Tech Serve Solutions supply for Oxalic acid monoethyl ester?
+
Tech Serve Solutions supplies Oxalic acid monoethyl ester with an assay of 97.5-102.5% (T) / 98%. We do not represent this product as USP, BP, or EP grade.
How should Oxalic acid monoethyl ester be handled safely?
+
Due to its potential to cause serious eye irritation (H319) and respiratory irritation (H334), handle Oxalic acid monoethyl ester with appropriate personal protective equipment, including eyeshields, gloves, and a suitable respirator. Ensure adequate ventilation.
Does Tech Serve Solutions export Oxalic acid monoethyl ester?
+
Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including Oxalic acid monoethyl ester.
How can I request a quote or sample for Oxalic acid monoethyl ester?
+
To request a quote or sample, please contact our sales team via the website or directly by phone.
▶ Related products

1-(2-Fluorobenzyl)piperazine
C11H15FN2
Chemical Synthesis
1-(2-Fluorophenyl)biguanide hydrochloride
Chemical Synthesis

1-(2-Fluorophenyl)cyclopropanecarboxylic acid
C10H9FO2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine
C10H13FN2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine monohydrochloride
C10H13FN2 · HCl
Chemical Synthesis
1-(2-Furoyl)-1H-benzotriazole
C11H7N3O2
Chemical Synthesis
1-(2-Furoyl)piperazine
C9H12N2O2
Chemical Synthesis
1-(2-Hydroxy-5-methylphenyl)-3-phenyl-1,3-propanedione
Chemical Synthesis
▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis