Di-tert-butyl oxalate
Di-tert-butyl oxalate (CAS 691-64-5) is an organic compound with the linear formula (CH3)3COCOCOOC(CH3)3 and a molecular weight of 202.25 g/mol. It functions as a building block in organic synthesis and is employed in various chemical processes. Supplied by Tech Serve Solutions, this ester is typically used in research and development settings for laboratory applications. Its well-defined structure and reactivity make it a valuable reagent for synthetic chemists.

Organic Synthesis
Di-tert-butyl oxalate serves as a key building block in the synthesis of more complex organic molecules. Its ester functionality allows for various reactions, making it a versatile reagent for chemists developing new compounds.
Chemical Research
This compound is utilised in academic and industrial research laboratories for exploring novel chemical transformations and developing new synthetic methodologies. Its availability from Tech Serve Solutions supports ongoing R&D efforts.
Reagent in Laboratories
As a laboratory reagent, Di-tert-butyl oxalate is used in specific analytical procedures and experimental setups where its chemical properties are required. It is supplied with a purity of 99% for reliable experimental results.
| Molecular weight | 202.25 |
|---|---|
| Linear formula | (CH3)3COCOCOOC(CH3)3 |
| Assay | 99% |
| Storage temperature | 2-8°C |
| Melting point | 69-72 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
Precautionary statements
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/38 |
| Safety statements (S) | 26-36 |
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 Di-tert-butyl oxalate used for?
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Di-tert-butyl oxalate is primarily used as a building block in organic synthesis and as a reagent in chemical research laboratories.
What is the CAS number and formula for Di-tert-butyl oxalate?
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The CAS number is 691-64-5 and the linear formula is (CH3)3COCOCOOC(CH3)3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Di-tert-butyl oxalate with an assay of 99%. We do not represent this product as USP, BP, or EP grade.
How should Di-tert-butyl oxalate be handled safely?
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Handle Di-tert-butyl oxalate with appropriate personal protective equipment, including a dust mask type N95 (US), eyeshields, and gloves. It is a Warning substance, causing skin irritation (H315) and serious eye irritation (H319).
How is Di-tert-butyl oxalate packed and shipped?
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Di-tert-butyl oxalate is stored at 2-8°C. Tech Serve Solutions is a global supplier and exporter, ensuring products are packed and shipped according to international regulations.
How can I request a sample or quote for Di-tert-butyl oxalate?
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To request a sample or obtain a quote for Di-tert-butyl oxalate, please contact our sales team through the website or by phone.
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