What is propargyl alcohol and what is it used for?
Propargyl alcohol (2-propyn-1-ol, CAS 107-19-7) is a reactive acetylenic alcohol. It is used mainly as a corrosion inhibitor for steel in hydrochloric-acid pickling and oil-well acidizing, as a stabilizer for chlorinated-hydrocarbon solvent formulations, and as a chemical-synthesis intermediate.
- ▸ Corrosion inhibition: Inhibitor for steel in hydrochloric-acid pickling and acidizing
- ▸ Oil & gas: Corrosion inhibitor in well-acidizing fluids
- ▸ Solvent stabilization: Stabilizer for chlorinated hydrocarbon formulations
- ▸ Chemical synthesis: Intermediate and building block
- ▸ Technical Data Sheet (TDS) PDF · TDS
- ▸ Typical Certificate of Analysis (CoA) PDF · COA
Values shown are typical for the current commercial grade. A lot-specific Certificate of Analysis accompanies every shipment; the grade-specific SDS is available on request.
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →
Transport classification per the UN Model Regulations / 49 CFR 172.101 Hazardous Materials Table. Confirm against the grade-specific SDS (Section 14) before shipping.
Propargyl alcohol (2-propyn-1-ol; CAS 107-19-7) is the simplest acetylenic alcohol — a reactive, water-miscible liquid with both a triple bond and a hydroxyl group. Its standout industrial use is as a steel corrosion inhibitor in acid pickling and oil-well acidizing, where it dramatically slows acid attack on metal; it is also a chemical intermediate and solvent. It is toxic and flammable, so it is handled by trained personnel per the SDS. Identity: PubChem.
What is propargyl alcohol?
Propargyl alcohol is HC≡C–CH2OH, a small molecule carrying a reactive carbon–carbon triple bond next to a hydroxyl. The triple bond lets it polymerize and adsorb onto steel surfaces, which is the basis of its powerful corrosion-inhibiting action in strong acids, and also makes it a versatile building block in synthesis.
Applications by sector
Corrosion inhibition (oilfield & metal). The primary use: a corrosion inhibitor and intensifier in hydrochloric-acid pickling baths and in oil- and gas-well acidizing fluids, protecting tubing and equipment from acid attack — often paired with the acidizing acids (HF / ammonium bifluoride mud-acid systems). Chemical synthesis. An intermediate for pharmaceuticals, agrochemicals, corrosion-inhibitor packages and specialty chemicals. Solvent & stabilizer. A solvent and a stabilizer for chlorinated solvents. Use levels are application-specific; design them with your process and EHS team.
Forms and grades
Supplied as a clear liquid; confirm assay and grade on the RFQ. The CoA documents the lot.
Handling, hazards and documentation
Propargyl alcohol is toxic (by inhalation, skin and ingestion) and flammable, and is corrosive/irritating. Handle only with appropriate PPE, ventilation and controls per the current Safety Data Sheet (SDS). Each lot ships with a Certificate of Analysis (CoA); transport under the applicable hazardous-materials rules.
Bulk supply and RFQ
RawSource supplies propargyl alcohol in bulk to oilfield, metal-treatment and chemical-synthesis buyers, with CoA and SDS per lot, under HazMat transport. Submit an RFQ with your grade and target quantity.
Typical Properties
Typical reference values, not a specification; the Certificate of Analysis (CoA) for the lot governs.
| Property | Typical Value |
|---|---|
| Chemical Name | Propargyl alcohol (2-propyn-1-ol) |
| CAS Number | 107-19-7 |
| Molecular Formula | C3H4O |
| Appearance | Clear, colorless liquid |
| Solubility | Miscible with water and many organic solvents |
| Key use | Steel corrosion inhibitor (acidizing / pickling); intermediate |
| Hazard / handling | Toxic and flammable — refer to the current SDS |
Regulatory status
- TSCA (US): Listed — Active
- REACH (EU): Registered
- EC number: 203-471-2
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Solutions Using This Product
Process-solution guides on this site that specify this chemistry:
- Acidizing & Well Stimulation Chemicals (Oil, Gas & Mining)
- Corrosion Inhibitors for Oil & Gas Production (Oil, Gas & Mining)
Frequently Asked Questions
What is propargyl alcohol used for?
Propargyl alcohol (CAS 107-19-7) is used mainly as a steel corrosion inhibitor in acid pickling and oil-well acidizing, and as a chemical intermediate (for pharmaceuticals, agrochemicals and corrosion-inhibitor packages) and a solvent/stabilizer.
Why is propargyl alcohol a corrosion inhibitor?
Its reactive triple bond lets it adsorb onto and polymerize on steel surfaces in strong acid, forming a protective film that sharply reduces acid attack — the reason it is a core inhibitor in HCl pickling and well acidizing.
Is propargyl alcohol hazardous?
Yes — it is toxic (inhalation, skin, ingestion) and flammable, and is corrosive/irritating. It requires trained handling with PPE and ventilation per the SDS and ships under hazardous-materials rules.
What is the CAS and formula of propargyl alcohol?
It is 2-propyn-1-ol, CAS 107-19-7 (PubChem CID 7859), molecular formula C3H4O. The CoA documents assay and grade.
How is bulk propargyl alcohol supplied and quoted?
RawSource supplies it as a liquid in bulk with CoA and SDS per lot, under HazMat transport. Pricing is quote-based on grade and volume; submit an RFQ with your target quantity.
What is the REACH and TSCA regulatory status of Propargyl Alcohol (2-Propyn-1-ol)?
Propargyl Alcohol (2-Propyn-1-ol) (CAS 107-19-7) is listed as Active on the U.S. EPA TSCA Inventory and is recorded as REACH-registered in ECHA's public CHEM database (EC 203-471-2).