Molekula
5-Chlorosalicylic 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
5-Chlorosalicylic acid is an aromatic organic compound primarily used as a reagent in organic synthesis, an intermediate in the synthesis of the anthelmintic drug niclosamide, and a starting material for pharmaceuticals and agrochemicals. It is also employed in analytical chemistry for derivatizing amines and as a corrosion inhibitor. Laboratories also use it as a matrix compound for MALDI mass spectrometry of synthetic polymers. This white crystalline solid has a CAS number of 321-14-2, with the molecular formula C6H3Cl(OH)COOH and a molecular weight of 172.57 g/mol. It is stored at ambient conditions but requires careful handling due to its hazardous nature, indicated by the signal word "Danger." Molekula supplies 5-Chlorosalicylic 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
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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500 g — $346.60 per pack
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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 off-white powder |
| Melting Point | 170 - 174°C |
| Purity (HPLC) | ≥ 98.0% |
| Identification (IR) | Conforms to Reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 6.1 |
| Packing Group | III |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 90026813 |
| CAS Number | 321-14-2 |
| IUPAC Name | 5-chloro-2-hydroxybenzoic acid |
| EC Number | 206-283-9 |
| Molecular Formula | C6H3Cl(OH)COOH |
| Molecular Weight | 172.57 |
| Exact Mass | 171.9927 |
| SMILES | C1=CC(=C(C=C1Cl)C(=O)O)O |
| InChIKey | NKBASRXWGAGQDP-UHFFFAOYSA-N |
| InChI | InChI=1S/C7H5ClO3/c8-4-1-2-6(9)5(3-4)7(10)11/h1-3,9H,(H,10,11) |
| PubChem CID | 9447 |
| UN Number | UN2811 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29182975 |
| Tariff Code | 2918290090 |
Safety & GHS
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Toxic
GHS06
Hazard statements
- H301 Toxic if swallowed
- 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+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: 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
- 2-Hydroxy-5-chlorobenzoic acid
- 5 CSA
- 5-Chloro-2-hydroxybenzoic acid
- 5-Chloro-2-hydroxybenzoic Acid; NSC 30111; 2-Hydroxy-5-chlorobenzoic Acid;
- 5-chloro-salicyclic acid
- 5-ChlorsalicylsA currencyure
- Benzoic acid, 5-chloro-2-hydroxy-
- Epitope ID:613407
- Oprea1_451559
- Salicylic acid, 5-chloro-
Frequently asked questions
What is 5-Chlorosalicylic acid commonly used for?
5-Chlorosalicylic acid is primarily used as a reagent in organic synthesis, including the preparation of dyes, pharmaceuticals, and as an intermediate in the synthesis of the anthelmintic drug niclosamide.
What is the molecular formula and molecular weight of 5-Chlorosalicylic acid?
The molecular formula is **C₇H₅ClO₃** (corrected from C₆H₃Cl(OH)COOH), and the molecular weight is **172.57 g/mol**.
What safety classification does 5-Chlorosalicylic acid have?
The product is classified with the **Signal Word: Danger**, indicating it requires careful handling due to potential hazards.
How should 5-Chlorosalicylic acid be stored?
Store at **ambient temperature** in a tightly sealed container, away from moisture and incompatible substances.
Does Molekula supply 5-Chlorosalicylic acid in bulk quantities?
Yes, Molekula can supply 5-Chlorosalicylic acid in bulk, with quantities tailored to your specific requirements.
What documentation is provided with an order of 5-Chlorosalicylic 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.