58196-28-4

Basic information

• Product Name: pentacosanal
• CAS NO: 58196-28-4
• Molecular Formula: C₂₅H₅₀O
• Molecular Weight: 366.6639
• Mol File: 58196-28-4.mol

Chemical Properties

• Boiling Point: 387.5°C at 760 mmHg
• Flash Point: 198.4°C
• Density: 0.836g/cm³
• Vapor Pressure: 3.27E-06mmHg at 25°C
• Refractive Index: 1.45
• CAS DataBase Reference: pentacosanal(CAS DataBase Reference)
• NIST Chemistry Reference: pentacosanal(58196-28-4)
• EPA Substance Registry System: pentacosanal(58196-28-4)

Safety Data

• Hazardous Substances Data: 58196-28-4(Hazardous Substances Data)

Upstream product

• 26631-99-2 (R)-2-hydroxyhexacosanoic acid 
• 546-67-8 lead(IV) tetraacetate 
• 26040-98-2 pentacosan-1-ol 
• 506-38-7 pentacosanoic acid 

Downstream Products

• 506-38-7 pentacosanoic acid 
• 340006-17-9 (3R,5RS)-3-methynonacosan-5-ol 

Relevant articles and documents

Identification of very long chain unsaturated fatty acids from Ximenia oil by atmospheric pressure chemical ionization liquid chromatography-mass spectroscopy

A method is described for the enrichment of very long chain unsaturated fatty acids from total fatty acids of Ximenia oil and their identification as picolinyl esters by means of liquid chromatography-mass spectrometry with atmospheric pressure chemical ionization (LC-MS/APCI). The method is based on the use of preparative reversed phase HPLC and their subsequent identification by microbore LC-MS/APCI. The combination of these two techniques was used to identify unusual unsaturated VLCFAs up to tetracontenoic acid. All four positional isomers of tetratriacontenoic acid were also synthesized to unambiguously confirm their structure.

Semivolatile and volatile compounds in combustion of polyethylene

The evolution of semivolatile and volatile compounds in the combustion of polyethylene (PE) was studied at different operating conditions in a horizontal quartz reactor. Four combustion runs at 500 and 850°C with two different sample mass/air flow ratios and two pyrolytic runs at the same temperatures were carried out. Thermal behavior of different compounds was analyzed and the data obtained were compared with those of literature. It was observed that α,ω-olefins, α-olefins and n-paraffins were formed from the pyrolytic decomposition at low temperatures. On the other hand, oxygenated compounds such as aldehydes were also formed in the presence of oxygen. High yields were obtained of carbon oxides and light hydrocarbons, too. At high temperatures, the formation of polycyclic aromatic hydrocarbons (PAHs) took place. These compounds are harmful and their presence in the combustion processes is related with the evolution of pyrolytic puffs inside the combustion chamber with a poor mixture of semivolatile compounds evolved with oxygen. Altogether, the yields of more than 200 compounds were determined. The collection of the semivolatile compounds was carried out with XAD-2 adsorbent and were analyzed by GC-MS, whereas volatile compounds and gases were collected in a Tedlar bag and analyzed by GC with thermal conductivity and flame ionization detectors.

Synthesis of the enantiomers of some methyl-branched cuticular hydrocarbons of the ant, Diacamma sp.

The enantiomers of 3-methylpentacosane, 3-methylheptacosane, 3-methylnonacosane, 13-methylheptacosane, and 5-methylheptacosane were synthesized by starting from the enantiomers of 2-methylbutyl bromide or citronellol. These methyl-branched alkanes are the characteristic components of the cuticular hydrocarbons of queen of the ant, Diacamma sp.