Molekula
2-Butynoic acid
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-Butynoic acid is an unsaturated carboxylic acid with a triple bond in its structure, primarily used as a building block in organic synthesis, pharmaceutical intermediates, and agrochemical production. It serves as a key precursor in the creation of complex molecules, including vitamins and specialty chemicals. This chemical has a CAS number of 590-93-2, with the molecular formula CH3C≡CCO2H and a molecular weight of 84.07 g/mol. It is typically stored at ambient conditions and carries a "Danger" signal word under GHS classification. Molekula supplies 2-Butynoic acid 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.
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | white to yellow powder |
| Melting Point | 74°C to 78°C |
| Purity | ≥ 98% |
| Identification (IR) | conforms to structure |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 90036931 |
| CAS Number | 590-93-2 |
| IUPAC Name | but-2-ynoic acid |
| EC Number | 209-695-7 |
| Molecular Formula | CH3C≡CCO2H |
| Molecular Weight | 84.07 |
| Exact Mass | 84.0211 |
| SMILES | CC#CC(=O)O |
| InChIKey | LUEHNHVFDCZTGL-UHFFFAOYSA-N |
| InChI | InChI=1S/C4H4O2/c1-2-3-4(5)6/h1H3,(H,5,6) |
| PubChem CID | 68535 |
| UN Number | UN3261 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29161950 |
| Tariff Code | 2916199590 |
Safety & GHS
-
Corrosive
GHS05
Hazard statements
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- 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, 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-Propynecarboxylic acid
- 2-butylnoic acid
- 2-butynic acid
- 3-Methylpropiolic acid
- but-2-ynoic acid
- butynoic acid
- propinecarboxylic acid
- Tetrolic acid
- TetrolsA currencyure
- Tetrolsaure
Frequently asked questions
What is 2-Butynoic acid commonly used for?
2-Butynoic acid is primarily used as an intermediate in organic synthesis, including the production of pharmaceuticals, agrochemicals, and specialty polymers.
What is the molecular formula and molecular weight of 2-Butynoic acid?
The molecular formula is **CH₃C≡CCO₂H** and the molecular weight is **84.07 g/mol**.
How should 2-Butynoic acid be stored?
Store at **ambient temperature** in a cool, dry place, away from incompatible substances and moisture.
What grade or purity is available for 2-Butynoic acid?
Molekula supplies **technical grade** and **high-purity (98%+)** 2-Butynoic acid; please specify your requirements.
Can Molekula supply 2-Butynoic acid in bulk quantities?
Yes, we offer bulk quantities of 2-Butynoic acid; minimum order quantities and pricing depend on the grade and volume requested.
What documentation comes with an order of 2-Butynoic acid?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.