Dibenzo[a,i]pyrene CAS 189-55-9
| CAS No. | 189-55-9 |
| Molecular Formula | C24H14 |
| Molecular Weight | 302.37 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Dibenzo[a,i]pyrene is closely related to a polycyclic aromatic system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Dibenzo[a,i]pyrene (CAS 189-55-9), molecular formula C24H14 and molecular weight 302.37 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, Dibenzo[a,i]pyrene (C24H14) contains a polycyclic aromatic system. The molecule exhibits a degree of unsaturation (DBE) of 18.0, corresponding to approximately 18 ring(s) or double-bond equivalent(s). With a molecular weight of 302.37 g/mol, it falls into the moderately-high-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), Dibenzo[a,i]pyrene 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 | C24H14 |
| Molecular Weight | 302.37 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Dibenzo Standards
- Dibenzo[e,l]pyrene (CAS 192-51-8)
- Dibenzo[a,k]fluoranthene (CAS 84030-79-5)
- Dibenzo[b,e]fluoranthene (CAS 2997-45-7)
- Dibenzo[b,j]fluoranthene (CAS 5385-22-8)
- Dibenzo[j,l]fluoranthene (CAS 203-18-9)
- Dibenzo[a,e]fluoranthene (CAS 5385-75-1)
- Dibenzo(B,K)Fluoranthene (CAS 205-97-0)
- Dibenzo[A,H]Pyrene (CAS 189-64-0)
Recommended Standards
- H-Arg-Lys-OH (CAS 40968-46-5)
- H-Lys-Arg-OH (CAS 29586-66-1)
- Naphtho[2,3-e]pyrene (CAS 193-09-9)
- Fenbendazole-d3 (CAS 1228182-47-5)
- (R)-1-(1H-benzimidazol-2-yl)-3-methylbutylamine (CAS 1235960-36-7)
- 2-Chloro-4-(difluoromethyl)-5-fluoronicotinic acid (CAS 1804665-88-0)
- Tris[N-(hydroxy-κO)-N-methylmethanethioamidato-κS]iron (CAS 31323-26-9)
- [1-(1-Phenylethyl)-1H-benzimidazol-2-yl]methanol (CAS 380551-61-1)
- 2-((4-Ethyl-5-(4-methoxyphenyl)-4H-1,2,4-triazol-3-yl)thio)acetic acid (CAS 305337-10-4)
- 2-amino-2-(3-methoxycyclohexyl)ethan-1-ol hydrochloride (CAS 1955555-02-8)
- 3-Methyl-N-(pyrimidin-5-ylmethyl)aniline (CAS 1344056-72-9)
- Methyl 2-cyano-2-(5-cyanopyridin-2-yl)acetate (CAS 1242268-04-7)
- 3-Bromo-4-methylbenzohydrazide (CAS 515143-79-0)
- Insulin Degludec Impurity 17 (CAS CATO-C4X-215717)
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