Acetophenone
Acetophenone (CAS: 98-86-2), with the chemical formula CH3COC6H5, is a fundamental aromatic ketone. It presents as a colourless to pale yellow liquid or solid, depending on ambient temperature, with a distinctively sweet, floral aroma. Its primary utility lies as a key intermediate in organic synthesis, particularly in the production of pharmaceuticals and fragrances. It also finds application as a photoinitiator in polymerisation processes and as a standard in analytical chemistry.
- IUPAC
- Methyl phenyl ketone
- Synonyms
- Methyl phenyl ketonePhenyl methyl ketone1-PhenylethanoneEthanone, 1-phenyl-Acetylbenzene

Pharmaceutical Intermediate
Acetophenone serves as a crucial building block in the synthesis of various pharmaceutical compounds. Its reactive carbonyl group allows for diverse chemical transformations, enabling the creation of complex molecular structures required for drug development.
Fragrance and Flavour Component
Due to its pleasant, sweet, floral scent, acetophenone is utilised in the perfumery industry to impart specific aromatic notes to fragrances. It can also be employed in certain flavour formulations, although its use in food is restricted and requires careful consideration of regulatory standards.
Photoinitiator in Polymerisation
In the field of polymer chemistry, acetophenone acts as a photoinitiator. Upon exposure to UV light, it generates free radicals that initiate the polymerisation of monomers, a process vital for UV-curable coatings, inks, and adhesives.
Analytical Reagent
Acetophenone is recognised for its utility as an analytical reagent, particularly in chromatographic techniques. Its well-defined properties and presence in natural products like Rooibos tea make it a valuable reference standard for quality control and research.
| Molecular weight | 120.15 |
|---|---|
| Linear formula | CH3COC6H5 |
| Assay | ≥99.0% (GC) |
| Grade | puriss. p.a. |
| Boiling point | 202 °C(lit.) |
| Density | 1.03 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.534(lit.)n20/D 1.535 |
| Melting point | 19-20 °C(lit.) |
| Vapour pressure | 0.45 mmHg (25 °C)1 mmHg (15 °C) |
| Vapour density | 4.1 (vs air) |
| Autoignition temp | 1058 °F |
| Impurities tested | ≤0.015% free acid (as CH3COOH)≤0.3% water |

Hazard statements
- H302Harmful if swallowed
- H319Causes serious eye irritation
Precautionary statements
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 76 °C / 168.8 °F |
| Transport (UN / ADR) | UN 3334 |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-36 |
| Safety statements (S) | 26 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Transition Temp | solidification point 19-20 °C |
|---|
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 Acetophenone (CAS 98-86-2) primarily used for?
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Acetophenone is primarily used as an intermediate in the synthesis of pharmaceuticals and fragrances, as a photoinitiator in polymerisation, and as an analytical reagent.
What is the CAS number and chemical formula for Acetophenone?
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The CAS number for Acetophenone is 98-86-2, and its chemical formula is CH3COC6H5.
What grade and purity does Tech Serve Solutions supply for Acetophenone?
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Tech Serve Solutions supplies Acetophenone in Puriss. p.a. grade with an assay of ≥99.0% (GC).
How should Acetophenone be handled safely?
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Acetophenone is harmful if swallowed and causes serious eye irritation. Handle with appropriate personal protective equipment, including eyeshields, gloves, and a suitable respirator, ensuring good ventilation and avoiding contact with skin and eyes.
How is Acetophenone packaged and exported by TSS?
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Tech Serve Solutions, as a global supplier and exporter, ensures that Acetophenone is appropriately packaged and handled in compliance with international shipping regulations for chemical products.
How can I request a sample or quote for Acetophenone?
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To request a sample or a quotation for Acetophenone, please contact our sales department through the provided channels on our website.
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