Molekula
2-Butyne-1,4-diol
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
2-Butyne-1,4-diol is an organic compound with a triple bond between the second and third carbon atoms, widely used as a solvent, intermediate in pharmaceutical synthesis, and in the production of resins, polymers, and specialty chemicals. It also serves as a corrosion inhibitor, an electroplating brightener, a stabilizer for chlorinated hydrocarbons, and a starting material for flame retardants. It is also employed in the manufacture of vitamins and agrochemicals. This chemical has a CAS number of 110-65-6, a molecular formula of C4H6O2, and a molecular weight of 86.09. It is typically stored at ambient conditions and carries a signal word of Danger due to its hazardous properties. Molekula supplies 2-Butyne-1,4-diol from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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Specifications
| Property | Value |
|---|---|
| Appearance | White to yellowish crystals |
| Identification | Conforms to reference |
| Purity | ≥ 98.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 152 °C |
| Transport Class | 6.1 |
| Packing Group | III |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White, orthorhombic crystals |
| Melting Point | 58 °C |
| Boiling Point | 238 °C |
| Density | 1.1 (relative, water = 1) |
| Water Solubility | 3740 g/L at 25 °C |
| Solubility (other solvents) | Insoluble in benzene; slightly soluble in ethyl ether, choroform; very soluble in ethanol, acetone, methanol |
| Vapour Pressure | 0.2 Pa at 20 °C |
| Refractive Index | 1.4804 |
Source: PubChem CID 8066 (HSDB, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 90037630 |
| CAS Number | 110-65-6 |
| IUPAC Name | but-2-yne-1,4-diol |
| EC Number | 203-788-6 |
| Molecular Formula | C4H6O2 |
| Molecular Weight | 86.09 |
| Exact Mass | 86.0368 |
| SMILES | C(C#CCO)O |
| InChIKey | DLDJFQGPPSQZKI-UHFFFAOYSA-N |
| InChI | InChI=1S/C4H6O2/c5-3-1-2-4-6/h5-6H,3-4H2 |
| PubChem CID | 8066 |
| UN Number | UN2716 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2905399000 |
| Tariff Code | 2905399590 |
Safety & GHS
-
Corrosive
GHS05
-
Toxic
GHS06
-
Serious Health Hazard
GHS08
Hazard statements
- H301 + H311 + H331 Toxic if swallowed, in contact with skin or if inhaled
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
- H317 May cause an allergic skin reaction
- H335 May cause respiratory irritation
- H370 Causes damage to organs
- H372 Causes damage to organs through prolonged or repeated exposure
- H402 Harmful to aquatic life
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 1,4-Butinodiol
- 1,4-Dihydroxy-2-butyne
- 2-Butin-1,4-diol
- 2-Butin-1,4-diol (Czechoslovakia)
- 2-Butynediol
- Agrisynth B3D
- Bis(hydroxymethyl)acetylene
- But-2-yne-1,4-diol
- Butynediol
- Butynediol-1,4
Frequently asked questions
What is 2-Butyne-1,4-diol commonly used for?
2-Butyne-1,4-diol is primarily used as a chemical intermediate in the synthesis of pharmaceuticals, agrochemicals, and polymers like polyesters and polyurethanes.
What is the molecular formula and molecular weight of 2-Butyne-1,4-diol?
The molecular formula is **C₄H₆O₂**, and the molecular weight is **86.09 g/mol**.
How should 2-Butyne-1,4-diol be stored?
Store at **ambient temperature** in a cool, dry place, away from incompatible substances and ignition sources.
What grades or purities of 2-Butyne-1,4-diol does Molekula offer?
Molekula supplies **technical grade** and **high-purity (HPLC/ACS grade)** 2-Butyne-1,4-diol, depending on your application requirements.
Can Molekula supply 2-Butyne-1,4-diol in bulk quantities?
Yes, we offer bulk packaging options (e.g., 5kg, 25kg, and 100kg drums) for large-scale production needs.
What documentation is provided with an order of 2-Butyne-1,4-diol?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS/SDS)**, and **batch-specific documentation** for traceability.
Ready to order or need a custom pack?
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