Alpha-Methylstyrene CAS 98-83-9
| CAS No. | 98-83-9 |
| Molecular Formula | C9H10 |
| Molecular Weight | 118.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Alpha-Methylstyrene (CAS 98-83-9) is a high-purity analytical reference standard with the molecular formula C9H10 and a molecular weight of 118.18 g/mol.
Owing to an aromatic ring system, Alpha-Methylstyrene is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 118.18 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
As a certified reference material (CRM), Alpha-Methylstyrene meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C9H10 |
| Molecular Weight | 118.18 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | Stable under recommended storage conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Alpha Standards
- β-Methylstyrene (cis- and trans- mixture) (stabilized with TBC) (CAS 637-50-3)
- 2-Methylstyrene (CAS 611-15-4)
- 3-Methylstyrene (CAS 100-80-1)
- 4-Methylstyrene (CAS 622-97-9)
- cis-β-Methylstyrene (CAS 766-90-5)
- α-Methylstyrene-d10 (stabilized with hydroquinone) (CAS 10362-82-0)
- α-Methylstyrene Oxide (CAS 2085-88-3)
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