cis-β-Methylstyrene CAS 766-90-5
| CAS No. | 766-90-5 |
| Molecular Formula | C9H10 |
| Molecular Weight | 118.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including cis-β-Methylstyrene.
cis-β-Methylstyrene (CAS 766-90-5) 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, cis-β-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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C9H10 |
| Molecular Weight | 118.18 g/mol |
| Purity | 97%+ |
| 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 cis Standards
- β-Methylstyrene (cis- and trans- mixture) (stabilized with TBC) (CAS 637-50-3)
- Alpha-Methylstyrene (CAS 98-83-9)
- 2-Methylstyrene (CAS 611-15-4)
- 3-Methylstyrene (CAS 100-80-1)
- 4-Methylstyrene (CAS 622-97-9)
- α-Methylstyrene-d10 (stabilized with hydroquinone) (CAS 10362-82-0)
- α-Methylstyrene Oxide (CAS 2085-88-3)
Recommended Standards
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- 1,6-Diaminohexane-15N2 1,6-Hexanediamine-15N2 287476-10-2 Hexamethylenediamine-15N2 (CAS 287476-10-2)
- Ethyl 2-(2-chloro-4-fluorophenoxy)acetate (CAS 1716-85-4)
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- Semaglutide impurity 202 (CAS CATO-C4X-2226202)
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