4H-Chromene CAS 254-03-5
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 254-03-5 |
| Molecular Formula | C20H16N2O2 |
| Molecular Weight | 316.35 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4H-Chromene (CAS 254-03-5) is a high-purity pharmaceutical standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C20H16N2O2. Molecular weight: 316.35 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
Physical & Chemical Properties
| Molecular Formula | C20H16N2O2 |
| Molecular Weight | 316.35 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 2 |
Related H Standards
- 2h-Chromene-3-sulfonyl chloride (CAS 1235441-16-3)
- 2H-Chromene-3-carbonyl chloride (CAS 41873-72-7)
- 2H-chromene-3-carbothioamide (CAS 423768-57-4)
- 2H-chromene-8-carboxylic acid (CAS 1935147-76-4)
- 2H-Chromene-3-carboxylic acid (CAS 22649-28-1)
- 2H-Chromene-5-carboxylic acid (CAS 843652-50-6)
- 2H-chromene-6-carboxylic acid (CAS 527681-43-2)
- 4H-Chromene-2-carboxylic acid (CAS 67283-74-3)
Recommended Standards
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- 4-Ethoxy-N-(6-fluorobenzo[d]thiazol-2-yl)benzamide (CAS 476297-76-4)
- Favipiravir-13C3 (CAS CATO-C4X-210210)
- N-(3-aminophenyl)-4-methoxybenzamide (CAS 41378-23-8)
- 6-Amino-5-iododihydropyrimidine-2,4(1H,3H)-dione (CAS 1785759-52-5)
- 1-(3-Ethoxyphenyl)butan-1-one (CAS 1183325-55-4)
- 1-((4-Amino-2-methylpyrimidin-5-yl)methyl)-3,4-dimethylpyridin-1-ium chloride hydrochloride (CAS 1139704-81-6)
- 5-(5,6-Dimethoxy-1H-benzo[d]imidazol-2-yl)-2-methylaniline (CAS 1082307-02-5)
- Tirzepatide (CAS 2023788-19-2)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 13829788188 / jacky.chen@cato-chem.com