Propargyl chloride
Propargyl chloride (CAS 624-65-7), with the molecular formula HC≡CCH<sub>2</sub>Cl and a molar mass of 74.51 g/mol, is a terminal alkyne and a valuable building block in organic synthesis. This compound is known for its reactivity in chemical transformations. It is used in research for studying photochemical processes and in the development of novel polymer resins, particularly those analogous to bisphenol A.
- IUPAC
- 3-Chloro-1-propyne
- Synonyms
- 3-Chloro-1-propyne

Photochemical Studies
Propargyl chloride has been employed in scientific investigations to study the emission spectra of dissociating molecules upon photoexcitation at specific wavelengths, contributing to fundamental chemical research.
Polymer Resin Synthesis
This chemical intermediate is utilised in the synthesis of novel tetraaryl and triaryl analogues of bisphenol A propargyl resins, expanding the scope of advanced material development.
Organic Synthesis Building Block
As a functionalised alkyne, propargyl chloride serves as a versatile building block in organic chemistry for constructing more complex molecular architectures.
| Molecular weight | 74.51 |
|---|---|
| Linear formula | HC≡CCH2Cl |
| Assay | 98% |
| Boiling point | 58 °C(lit.) |
| Density | 1.03 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.435(lit.) |
| Solubility | benzene: misciblechloroform: misciblediethyl ether: miscibleethanol: miscibleethyl acetate: miscibleethylene glycol: misciblewater: insoluble |
| Concentration | 70 wt. % in toluene |
| Storage temperature | 2-8°C |
| Application | Propargyl chloride was used to study emission spectra of dissociating propargyl chloride upon photoexcitation at 199 nm1. It was used in the synthesis of novel tetraaryl analog of bisphenol A and triaryl analog of bisphenol A propargyl resins2. |



Hazard statements
- H225Highly flammable liquid and vapour
- H301Toxic if swallowed
- H311Toxic in contact with skin
- H314Causes severe skin burns and eye damage
- H331Toxic if inhaled
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US) |
|---|---|
| Flash point | 19 °C / 66.2 °F |
| Transport (UN / ADR) | UN 3286 3/PG 2 |
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | F,T |
| Risk statements (R) | 11-23/24/25-34 |
| Safety statements (S) | 16-26-27-36/37/39-45 |
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 propargyl chloride used for?
+
Propargyl chloride is used in photochemical studies and in the synthesis of novel tetraaryl and triaryl analogues of bisphenol A propargyl resins. It also functions as a building block in organic synthesis.
What are the CAS number and chemical formula for propargyl chloride?
+
The CAS number for propargyl chloride is 624-65-7, and its chemical formula is HC≡CCH<sub>2</sub>Cl.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies propargyl chloride with an assay of 98%. We do not represent this product as USP, BP, or EP grade; it is suitable for research and general chemical synthesis purposes.
How should propargyl chloride be handled safely?
+
Propargyl chloride is a highly flammable liquid and vapour, causes severe skin burns and eye damage, and is toxic if swallowed, in contact with skin, or if inhaled. Handling requires extreme caution, including the use of full-face respirators, chemical-resistant gloves, safety goggles, and working in a well-ventilated area, strictly adhering to the precautionary statements (P210, P261, P280, P305 + P351 + P338, P310).
How is propargyl chloride packed, shipped, and exported?
+
Propargyl chloride is packaged according to international transport regulations for hazardous materials. Tech Serve Solutions is experienced in exporting chemicals globally, ensuring compliance with all relevant shipping and customs requirements.
How can I request a sample or quote for propargyl chloride?
+
To request a sample or a quote for propargyl chloride, please contact our sales department via the website or direct inquiry, providing your specific requirements and contact information.
▶ 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