Molekula
trans-Crotonic 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
trans-Crotonic acid is a conjugated unsaturated carboxylic acid used in organic synthesis and as a building block in pharmaceutical and polymer research. Its main industrial use is as a comonomer with vinyl acetate for copolymers in coatings, lacquers and paper sizing, and in making resins, plasticizers and synthetic rubber softeners. It appears as a white to colorless crystalline solid (melting point about 70–72 °C) with a pungent odor. CAS: 107-93-7, molecular formula: C4H6O2, molecular weight: 86.09 g/mol. Store at ambient temperature. Hazard classification: Danger. Molekula supplies trans-Crotonic 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 light yellow flakes |
| Melting Point | 70.0°C - 73.0° |
| Water | ≤0.5% |
| Assay | ≥99.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 88 °C |
| Transport Class | 8 |
| Packing Group | III |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless needle-like crystals |
| Melting Point | 72 °C |
| Boiling Point | 184.7 °C |
| Density | 1.02 (relative, water = 1) |
| Water Solubility | Slightly soluble in water |
| Vapour Pressure | 24 Pa at 20 °C |
| Refractive Index | 1.4249 |
| pKa | pKa = 4.17 (at 18 °C) |
| log P (octanol/water) | 0.72 |
Source: PubChem CID 637090 (HSDB, DrugBank, ICSC, Joint FAO/WHO Expert Committee on Food Additives (JECFA))
Identification
| Property | Value |
|---|---|
| SKU | 49547160 |
| CAS Number | 107-93-7 |
| IUPAC Name | (E)-but-2-enoic acid |
| EC Number | 203-533-9 |
| Molecular Formula | CH3CH=CHCOOH |
| Molecular Weight | 86.09 |
| Exact Mass | 86.0368 |
| SMILES | C/C=C/C(=O)O |
| InChIKey | LDHQCZJRKDOVOX-NSCUHMNNSA-N |
| InChI | InChI=1S/C4H6O2/c1-2-3-4(5)6/h2-3H,1H3,(H,5,6)/b3-2+ |
| PubChem CID | 637090 |
| UN Number | UN2823 |
| REACH Code | Y110 |
| HTS Code | 2916.19.3000 |
| Tariff Code | 2916194000 |
Safety & GHS
-
Corrosive
GHS05
-
Toxic
GHS06
Hazard statements
- H302 Harmful if swallowed
- H311 Toxic in contact with skin
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
- 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+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P302+334 IF ON SKIN: Immerse in cool water/wrap in wet bandages
- 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, Russian, 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
- (2E)-but-2-enoic acid
- (E)-but-2-enoic acid
- 3-Methylacrylic acid
- alpha-Butenoic acid
- alpha-Crotonic acid
- beta-Methacrylic acid
- beta-Methylacrylic acid
- CROTONIC ACID
- Solid crotonic acid
- trans-2-Butenoic acid
Frequently asked questions
What is trans-Crotonic acid used for?
It is primarily used as a chemical intermediate in the synthesis of pharmaceuticals, agrochemicals, and polymers.
What is the chemical formula and molecular weight of trans-Crotonic acid?
The formula is CH3CH=CHCOOH with a molecular weight of 86.09 g/mol.
How should trans-Crotonic acid be stored?
It should be stored at ambient temperature, away from light and moisture.
What grade of trans-Crotonic acid does Molekula supply?
Molekula supplies trans-Crotonic acid in technical grade.
Can Molekula supply trans-Crotonic acid in bulk?
Yes, Molekula can supply trans-Crotonic acid in bulk quantities upon request.
What documentation comes with a purchase of trans-Crotonic acid?
Each order includes a Certificate of Analysis and Safety Data Sheet (SDS).
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.