4,5-Difluorobenzo[a]Pyrene CAS 137197-08-1
| CAS No. | 137197-08-1 |
| Molecular Formula | C20H10F2 |
| Molecular Weight | 288.29 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.
4,5-Difluorobenzo[a]Pyrene (CAS 137197-08-1), molecular formula C20H10F2 and molecular weight 288.29 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C20H10F2, 4,5-Difluorobenzo[a]Pyrene contains fluorine substitution, a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 288.29 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
CATO manufactures 4,5-Difluorobenzo[a]Pyrene under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C20H10F2 |
| Molecular Weight | 288.29 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Halogen Content | F-containing |
Related Difluorobenzo Standards
- 2-(2,2-Difluorobenzo[d][1,3]dioxole-5-sulfonamido)acetic acid (CAS 1707579-28-9)
- 2-(5,6-Difluorobenzo[b]thiophen-3-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 2096331-57-4)
- Ethyl 2-((6,7-difluorobenzo[d]oxazol-2-yl)thio)acetate (CAS 1071369-10-2)
- 1-(4,6-Difluorobenzo[d]thiazol-2-yl)azetidine-3-carboxylic acid (CAS 1283107-98-1)
- N-(4,6-Difluorobenzo[d]thiazol-2-yl)-2-fluorobenzamide (CAS 797005-28-8)
- N-(4,6-Difluorobenzo[d]thiazol-2-yl)-N-(furan-2-ylmethyl)acetamide (CAS 922371-33-3)
- N-(4,6-Difluorobenzo[d]thiazol-2-yl)-1,3-dimethyl-1H-pyrazole-5-carboxamide (CAS 1013771-75-9)
- 1-((2,2-Difluorobenzo[d][1,3]dioxol-5-yl)methyl)-2-oxo-1,2-dihydropyridine-3-carboxylic acid (CAS 400082-67-9)
Recommended Standards
- 3-Amino-1-(4-fluorobenzyl)-4-(2-fluorophenyl)azetidin-2-one (CAS 1291489-37-6)
- N-(5-Methyl-1,3,4-thiadiazol-2-yl)-6-(1H-1,2,4-triazol-1-yl)pyridazine-3-carboxamide (CAS 1448129-84-7)
- N-(5-(2-Methylthiazol-4-yl)-1,3,4-oxadiazol-2-yl)pyrazine-2-carboxamide (CAS 1251547-33-7)
- Tert-butyl 4-(2-cyanoacetyl)-3,3-difluoropiperidine-1-carboxylate (CAS 1638761-18-8)
- Bromotris(triphenylphosphine)rhodium(I) (CAS 14973-89-8)
- 5-Bromo-4-hydrazinyl-6-methylpyrimidine (CAS 3438-58-2)
- 4-[cyano(hydroxy)methyl]benzonitrile (CAS 15464-07-0)
- 1-(3-Fluoro-2-hydroxyphenyl)propan-1-one (CAS 879339-86-3)
- 3-Bromo-2-fluorobenzoyl chloride (CAS 374554-41-3)
- 2-Methyl-4-(pyrrolidin-2-ylmethoxy)pyrimidine (CAS 1342216-60-7)
- Ac-Trp-3,5-bis(trifluoromethyl)benzyl ester (CAS 148451-96-1)
- 4-(Benzyloxycarbonyl)benzeneboronic Acid (CAS 184000-11-1)
- [3,2':5',3''-Terpyridin]-3'-ylmethanol (CAS 1227573-25-2)
- ([13C6]Leu14)-Glucagon (1-29) (human, rat, porcine) trifluoroacetate salt (CAS 1802078-39-2)
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