Acetylsalicylic acid
Acetylsalicylic acid (CAS: 50-78-2), with the chemical formula 2-(CH3CO2)C6H4CO2H and a molecular weight of 180.16 g/mol, is a widely recognised organic compound. Known for its analgesic, anti-inflammatory, and antipyretic properties, it is a key ingredient in numerous pharmaceutical preparations. This compound also finds utility in chemical synthesis and as a research reagent in various scientific disciplines.
- IUPAC
- 2-Acetoxybenzoic acid,O-Acetylsalicylic acid,ASA,Aspirin
- Synonyms
- 2-Acetoxybenzoic acidO-Acetylsalicylic acidASAAspirin

Pharmaceutical Intermediate
Acetylsalicylic acid serves as a crucial active pharmaceutical ingredient (API) in the formulation of over-the-counter and prescription medications. It is valued for its pain-relieving, fever-reducing, and anti-inflammatory effects.
Chemical Synthesis
This compound is employed as a building block in organic synthesis. Its reactive functional groups allow for further chemical modifications to create more complex molecules for research and development purposes.
Research Reagent
In various scientific fields, including cell biology and biochemistry, Acetylsalicylic acid is used as a reagent for experimental studies. Its well-defined properties make it suitable for investigating biological pathways and chemical reactions.
| Molecular weight | 180.16 |
|---|---|
| Linear formula | 2-(CH3CO2)C6H4CO2H |
| Assay | ≥99.0% (HPLC) |
| Grade | purum |
| Solubility | H2O: soluble10 mg/mL at 37 °C(lit.)H2O: soluble3 mg/mL at 25 °C(lit.)ethanol: soluble50 mg/mLaqueous base: decomposes |
| Suitability | meets USP testing specifications |
| Melting point | 134-136 °C(lit.)134-136 °C |

Hazard statements
- H302Harmful if swallowed
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Flash point | 250 °C / 482 °F |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-36/37/38 |
| Safety statements (S) | 26 |
| Ignition residue | ≤0.1% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Absorption | ε1mM/230 nm, aqueous acid 466ε1mM/231 nm, aqueous base 409ε1mM/278 nm, aqueous acid 68ε1mM/298 nm, aqueous base 190 |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Acetylsalicylic acid used for?
+
Acetylsalicylic acid is primarily used as an analgesic, anti-inflammatory, and antipyretic agent in pharmaceutical preparations. It is also utilized in chemical synthesis and as a research reagent.
What are the CAS number and chemical formula for Acetylsalicylic acid?
+
The CAS number for Acetylsalicylic acid is 50-78-2, and its chemical formula is 2-(CH3CO2)C6H4CO2H.
What grade and purity does Tech Serve Solutions supply for Acetylsalicylic acid?
+
Tech Serve Solutions supplies Acetylsalicylic acid with a purity of ≥99.0% (HPLC) and a grade of 'purum'. It also meets USP testing specifications.
How should Acetylsalicylic acid be handled safely?
+
Acetylsalicylic acid is a Warning substance, classified with hazards H302 (Harmful if swallowed), H315 (Causes skin irritation), H319 (Causes serious eye irritation), and H335 (May cause respiratory irritation). Appropriate personal protective equipment, including a dust mask (type N95 US), eye shields, face shields, and gloves, should be used. Ensure good ventilation.
How is Acetylsalicylic acid packed, shipped, or exported by TSS?
+
TSS professionally packs and exports Acetylsalicylic acid, adhering to all relevant shipping regulations for chemical substances.
How can I request a sample or a quote for Acetylsalicylic acid?
+
To request a sample or a quote for Acetylsalicylic acid, please contact the TSS sales team through our website or by phone.
▶ Related products

1-(2-Fluorobenzyl)piperazine
C11H15FN2
Chemical Synthesis
1-(2-Fluorophenyl)biguanide hydrochloride
Chemical Synthesis

1-(2-Fluorophenyl)cyclopropanecarboxylic acid
C10H9FO2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine
C10H13FN2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine monohydrochloride
C10H13FN2 · HCl
Chemical Synthesis
1-(2-Furoyl)-1H-benzotriazole
C11H7N3O2
Chemical Synthesis
1-(2-Furoyl)piperazine
C9H12N2O2
Chemical Synthesis
1-(2-Hydroxy-5-methylphenyl)-3-phenyl-1,3-propanedione
Chemical Synthesis
▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis