CAS 638-66-4: Octadecanal
Description:Octadecanal, also known as stearaldehyde, is a long-chain aliphatic aldehyde with the molecular formula C18H36O. It is characterized by a straight-chain structure consisting of 18 carbon atoms, with a terminal aldehyde functional group (-CHO) at one end. This compound is typically a colorless to pale yellow liquid or solid at room temperature, depending on its purity and specific conditions. Octadecanal is insoluble in water but soluble in organic solvents such as ethanol and ether. It has a faint, fatty odor, reminiscent of natural fats and oils. Octadecanal is primarily used in the production of surfactants, lubricants, and as a flavoring agent in the food industry. Additionally, it serves as an intermediate in organic synthesis and can be involved in various chemical reactions, including oxidation and reduction processes. Its long carbon chain contributes to its hydrophobic properties, making it relevant in applications where water resistance is desired. Safety precautions should be observed when handling this substance, as it may cause irritation to the skin and eyes.
Formula:C18H36O
InChI:InChI=1S/C18H36O/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19/h18H,2-17H2,1H3
InChI key:InChIKey=FWWQKRXKHIRPJY-UHFFFAOYSA-N
SMILES:O=CCCCCCCCCCCCCCCCCC
- Synonyms:
- 1-Octadecanal
- 1-Oxooctadecane
- Nsc 68100
- Octadecanal
- Octadecanaldehyde
- Octadecyl aldehyde
- Stearyl aldehyde
- n-Octadecanal
- Stearaldehyde
Brand | Product data | Purity | Price range | Estimated delivery |
---|---|---|---|---|
![]() | Octadecanal REF: 3B-O0368CAS: 638-66-4 | >95.0%(GC) | 215.00 € | Wed 16 Apr 25 |
![]() | stearaldehyde REF: IN-DA00EDXWCAS: 638-66-4 | 97% | 30.00 €~221.00 € | Wed 23 Apr 25 |
![]() | Octadecanal REF: TM-T19493CAS: 638-66-4 | ≥98% | 48.00 €~137.00 € | Wed 30 Apr 25 |
![]() | Octadecanal REF: 54-OR54467CAS: 638-66-4 | 95% | 73.00 €~1,056.00 € | Wed 30 Apr 25 |
![]() | OCTADECANAL REF: 10-F533485CAS: 638-66-4 | 97.00% | To inquire | Mon 05 May 25 |
![]() | Octadecanaldehyde REF: TR-O233800CAS: 638-66-4 | - - - | 547.00 €~2,310.00 € | Tue 03 Jun 25 |
![]() | Octadecanal REF: 3D-AAA63866CAS: 638-66-4 | Min. 95% | - - - | Discontinued product |

Octadecanal
Ref: 3B-O0368
1g | 215.00 € |

Ref: IN-DA00EDXW
1g | 34.00 € | ||
5g | 82.00 € | ||
25g | 221.00 € | ||
250mg | 30.00 € |

Octadecanal
Ref: TM-T19493
50mg | 55.00 € |

Octadecanal
Ref: 54-OR54467
1g | 73.00 € | ||
5g | 132.00 € |

Ref: 10-F533485
1g | 27.00 € | ||
5g | 64.00 € | ||
10g | 117.00 € | ||
25g | 232.00 € | ||
100g | To inquire | ||
250mg | 24.00 € |

Octadecanaldehyde
Controlled ProductRef: TR-O233800
1g | 547.00 € | ||
10g | 2,310.00 € |

Octadecanal
Ref: 3D-AAA63866
1g | Discontinued | Request information | |
100mg | Discontinued | Request information |