Molekula
Thiophene-3-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-3-carboxylic acid is an organic heterocyclic compound featuring a thiophene ring with a carboxylic acid substituent, primarily used as a synthetic intermediate in pharmaceuticals, agrochemicals, and organic synthesis. It serves as a key building block for APIs, dyes, and specialty polymers. This chemical has a CAS number of 88-13-1, molecular formula 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-3-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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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.
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Specifications
| Property | Value |
|---|---|
| Appearance | White to light yellow powder |
| Melting Point | 136 - 144°C |
| Purity (Titration by NaOH) | 98.0 - 102.0% |
| Identification (IR) | Conforms to Reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 47774301 |
| CAS Number | 88-13-1 |
| IUPAC Name | thiophene-3-carboxylic acid |
| EC Number | 201-802-5 |
| Molecular Formula | C5H4O2S |
| Molecular Weight | 128.15 |
| Exact Mass | 127.9932 |
| SMILES | C1=CSC=C1C(=O)O |
| InChIKey | YNVOMSDITJMNET-UHFFFAOYSA-N |
| InChI | InChI=1S/C5H4O2S/c6-5(7)4-1-2-8-3-4/h1-3H,(H,6,7) |
| PubChem CID | 6918 |
| REACH Code | Y113 |
| HTS Code | 29349990 |
| Tariff Code | 2934999090 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- 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
- 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
- P333+313 IF skin irritation or a rash occurs: Get medical advice/attention
- P337+313 If eye irritation persists get medical advice/attention
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
- .beta.-Thiophenecarboxylic acid
- .beta.-Thiophenic acid
- 3-Carboxythiophene
- 3-Thenoic acid
- 3-thienoic acid
- 3-Thienylcarboxylic acid
- 3-thiophenecarboxylic
- 3-Thiophenecarboxylic acid
- 3-thiophenezoic acid
- Thiophene-3-formic acid
Frequently asked questions
What is thiophene-3-carboxylic acid commonly used for?
Thiophene-3-carboxylic acid is primarily used as an intermediate in organic synthesis, including the production of pharmaceuticals, agrochemicals, and heterocyclic compounds.
What is the chemical formula and molecular weight of thiophene-3-carboxylic acid?
The chemical formula is **C₅H₄O₂S**, and the molecular weight is **128.15 g/mol**.
How should thiophene-3-carboxylic acid be stored?
Store at **ambient temperature** in a cool, dry place, away from incompatible substances and moisture.
What grades or purities of thiophene-3-carboxylic acid does Molekula supply?
Molekula supplies thiophene-3-carboxylic acid in **high-purity (HPLC/GC-grade) and technical-grade** forms—confirm availability for your specific needs.
Can Molekula supply thiophene-3-carboxylic acid in bulk quantities?
Yes, Molekula can provide thiophene-3-carboxylic acid in bulk; contact us for pricing and lead times based on your order volume.
What documentation comes with an order of thiophene-3-carboxylic acid?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a product specification sheet.
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.