4-ethyl-2-methylthiophene CAS 13678-54-1
| CAS No. | 13678-54-1 |
| Molecular Formula | C7H10S |
| Molecular Weight | 126.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-ethyl-2-methylthiophene (CAS 13678-54-1), molecular formula C7H10S and molecular weight 126.22 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 4-ethyl-2-methylthiophene (C7H10S) contains sulfur-containing functionality. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 126.22 g/mol, it falls into the low-molecular-weight range. 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).
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 | C7H10S |
| Molecular Weight | 126.22 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1960 |
| Sulfur Atoms | 1 |
Related ethyl Standards
- 2-Ethyl-5-methylthiophene (CAS 40323-88-4)
- 3-Methylthiophene-2-carboxaldehyde (CAS 5834-16-2)
- 4-Methylthiophene 2-ylmethanol (CAS 74395-18-9)
- N2-Methylthiophene-2,3-diamine (CAS 1314915-78-0)
- 2-Methylthiophene-3-carbonitrile (CAS 53562-50-8)
- 3-Methylthiophene-2-carbonitrile (CAS 55406-13-8)
- 4-Methylthiophene-2-carbonitrile (CAS 73305-93-8)
- 4-Methylthiophene-3-carbonitrile (CAS 73229-39-7)
Recommended Standards
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- 2-n-Propylthiophene (CAS 1551-27-5)
- 2,4-Dichloro-3-ethyl-5-methylphenol (CAS 1127-60-2)
- 3-Bromo-5-fluorobenzene-1-sulfonyl chloride (CAS 1214342-44-5)
- 3-(3-Chlorophenyl)-4-carboethoxypropiophenone (CAS 898762-44-2)
- 2-(5,6-Dichloro-1H-indol-3-yl)propanoic acid (CAS 338744-31-3)
- 2-Ethyl-4-methylpentanoic acid (CAS 108-81-6)
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- 2-({[(9h-fluoren-9-yl)methoxy]carbonyl}amino)-5-fluorobenzoic acid (CAS 1185296-60-9)
- 2'-Methyl-2h,2'h-[3,3'-bipyrazole]-5-carboxylic acid (CAS 1092705-28-6)
- Methyl 2-(3-(pyridin-2-yl)-1H-pyrazol-1-yl)acetate (CAS 676479-88-2)
- Liraglutide(13-31)TFA Salt (CAS CATO-C4X-19929)
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