o-Cymene
o-Cymene (CAS 527-84-4), a clear, colourless liquid with the molecular formula C10H14, is a substituted aromatic hydrocarbon. It is primarily employed as a building block in organic synthesis and for the preparation of various chemical intermediates. Its properties make it a useful component in chemical research and industrial applications requiring specific aromatic structures.
- IUPAC
- 1-Isopropyl-2-methylbenzene,2-Isopropyltoluene
- Synonyms
- 1-Isopropyl-2-methylbenzene2-Isopropyltoluene

Organic Synthesis Intermediate
o-Cymene serves as a valuable precursor in the synthesis of more complex organic molecules. Its aromatic ring and alkyl substituents allow for various chemical transformations.
Chemical Research
Used in laboratory settings for research and development purposes, o-cymene is employed in studies involving aromatic chemistry and the development of new compounds.
Building Block for Specialty Chemicals
This compound acts as a foundational element for the creation of specialty chemicals. Its structure can be modified to yield diverse functionalised aromatic compounds.
| Molecular weight | 134.22 |
|---|---|
| Linear formula | CH3C6H4CH(CH3)2 |
| Assay | ≥98.0% (GC) |
| Boiling point | 178 °C(lit.) |
| Density | 0.877 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.499(lit.)n20/D 1.501 |
| Solubility | organic solvents: miscible(lit.)water: insoluble(lit.) |
| Melting point | −72-−71 °C(lit.) |
| Vapour pressure | 3.6 mmHg (37.7 °C) |

Hazard statements
- H226Flammable liquid and vapour
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 50 °C / 122 °F |
| Transport (UN / ADR) | UN 2046 3 / PGIII |
| Water hazard class (WGK, DE) | 2 |
| Risk statements (R) | 10 |
| Safety statements (S) | 23-24/25 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
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 o-Cymene used for?
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o-Cymene is utilised as a building block in organic synthesis and for the preparation of chemical intermediates in research and industrial applications.
What are the CAS number and chemical formula for o-Cymene?
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The CAS number for o-Cymene is 527-84-4, and its linear chemical formula is CH3C6H4CH(CH3)2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies o-Cymene with an assay of ≥98.0% (GC). This is a technical grade for research and synthesis purposes; TSS does not represent it as USP, BP, or EP grade.
How should o-Cymene be handled safely?
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o-Cymene is a flammable liquid and vapour (H226). Handle with appropriate personal protective equipment, including eyeshields and chemical-resistant gloves, in a well-ventilated area, away from ignition sources.
Is o-Cymene a controlled substance?
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The provided data does not indicate that o-Cymene is a controlled substance.
How is o-Cymene packed and shipped?
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o-Cymene is shipped according to UN 2046, Hazard Class 3, Packing Group III regulations, reflecting its flammable nature. Specific packaging details are available upon request.
How can I request a sample or quote for o-Cymene?
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Please contact our sales department directly via our website or by phone to request a sample or obtain a quotation for o-Cymene.
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