2-Butyn-1-al diethyl acetal
2-Butyn-1-al diethyl acetal (CAS: 2806-97-5) is an organic compound with the formula CH3C≡CCH(OC2H5)2 and a molecular weight of 142.20 g/mol. This acetal serves as a versatile building block in organic synthesis, particularly for introducing the 1,1-diethoxy-2-butynyl moiety into more complex molecules. It is a valuable intermediate in the preparation of various fine chemicals and pharmaceutical precursors.
- IUPAC
- 1,1-Diethoxy-2-butyne

Organic Synthesis Intermediate
Utilised as a key building block in the synthesis of complex organic molecules. Its acetal functionality allows for controlled reactions and subsequent transformations in multi-step synthetic routes.
Pharmaceutical Precursor Synthesis
Employed in the development pathways for novel pharmaceutical agents. The compound's structure makes it suitable for incorporation into potential drug candidates and their intermediates.
Fine Chemical Production
A valuable reagent in the production of various fine chemicals. It facilitates the creation of specialized chemical entities with specific properties and applications.
| Molecular weight | 142.20 |
|---|---|
| Linear formula | CH3C≡CCH(OC2H5)2 |
| Assay | 98% |
| Boiling point | 65-67 °C/12 mmHg(lit.) |
| Density | 0.9 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.426(lit.) |


Hazard statements
- H226Flammable liquid and vapour
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 56 °C / 132.8 °F |
| Transport (UN / ADR) | UN 1993C 3 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36/37/39 |
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 2-Butyn-1-al diethyl acetal used for?
+
2-Butyn-1-al diethyl acetal is primarily used as a versatile building block and intermediate in organic synthesis, particularly for the preparation of fine chemicals and pharmaceutical precursors.
What are the CAS number and formula for 2-Butyn-1-al diethyl acetal?
+
The CAS number is 2806-97-5, and the linear formula is CH3C≡CCH(OC2H5)2.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies 2-Butyn-1-al diethyl acetal with an assay of 98%. This product is not represented as USP, BP, EP, or any other pharmacopoeia grade.
What are the safety and handling precautions for this chemical?
+
This compound is a flammable liquid and vapour (H226) and can cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Appropriate personal protective equipment, including safety goggles, gloves, and respiratory protection, should be used. Handle in a well-ventilated area away from ignition sources.
Can this chemical be exported?
+
Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including 2-Butyn-1-al diethyl acetal, adhering to all relevant international shipping regulations.
How can I request a sample or quote?
+
To request a sample or quote for 2-Butyn-1-al diethyl acetal, please contact our sales department through the website or 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