Molekula
Thiophene-2-carboxylic 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
Thiophene-2-carboxylic acid is an aromatic heterocyclic compound containing a thiophene ring fused with a carboxylic acid group, primarily used as a building block in organic synthesis, pharmaceuticals, and agrochemicals. It serves as a key intermediate for dyes, polymers, and biologically active molecules. Its sodium salt is also used as a thickening agent in lubricating greases. This chemical has a CAS number of 527-72-0, a molecular formula of C5H4O2S, and a molecular weight of 128.15 g/mol. It is stored at ambient conditions and carries a signal word of "Warning" for safety classification. Molekula supplies Thiophene-2-carboxylic 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.
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Specifications
| Property | Value |
|---|---|
| Appearance | White to beige powder |
| Melting Point | 124 - 130°C |
| Assay (aqueous acid-base titration) | ⩾ 95.0% |
| Water (KF) | Report |
| Identification (IR) | Conforms to Reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Vapour Pressure | 0.0078 mmHg |
Source: PubChem CID 10700 (Haz-Map)
Identification
| Property | Value |
|---|---|
| SKU | 26032569 |
| CAS Number | 527-72-0 |
| IUPAC Name | thiophene-2-carboxylic acid |
| EC Number | 208-423-4 |
| Molecular Formula | C4H3S(COOH) |
| Molecular Weight | 128.15 |
| Exact Mass | 127.9932 |
| SMILES | C1=CSC(=C1)C(=O)O |
| InChIKey | QERYCTSHXKAMIS-UHFFFAOYSA-N |
| InChI | InChI=1S/C5H4O2S/c6-5(7)4-2-1-3-8-4/h1-3H,(H,6,7) |
| PubChem CID | 10700 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29349944 |
| Tariff Code | 2934999090 |
Safety & GHS
-
Health Hazard
GHS07
Hazard statements
- H302+312 Harmful if swallowed or in contact with skin
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- 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+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
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
- 2-Carboxythiophene
- 2-TCA
- 2-Thenoic acid
- 2-Thienylcarboxylic acid
- 2-Thiophenecarboxylic acid
- Rhinotrophyl (TN)
- Tenoic acid
- Thenoic acid
- Thiophene-2-carbixylic acid
Frequently asked questions
What is thiophene-2-carboxylic acid commonly used for?
Thiophene-2-carboxylic acid is primarily used as a building block in organic synthesis, including the production of pharmaceuticals, agrochemicals, and specialty polymers.
What is the chemical formula and molecular weight of thiophene-2-carboxylic acid?
The chemical formula is **C₅H₄O₂S** (or **C₄H₃S(COOH)**), and the molecular weight is **128.15 g/mol**.
How should thiophene-2-carboxylic acid be stored?
Store in a tightly sealed container at **ambient temperature**, away from moisture, light, and incompatible substances.
What purity grades are available for thiophene-2-carboxylic acid?
Molekula supplies thiophene-2-carboxylic acid in **high-purity analytical and reagent grades** (typically ≥98%).
Can Molekula supply thiophene-2-carboxylic acid in bulk quantities?
Yes, we offer bulk packaging options (e.g., 5 kg, 25 kg, and larger) upon request—contact us for pricing and availability.
What documentation is provided with an order of thiophene-2-carboxylic 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.