(−)-Citronellal
(−)-Citronellal (CAS: 5949-05-3, Formula: C10H18O) is a chiral acyclic monoterpene aldehyde with a molecular weight of 154.25 g/mol. Primarily recognised for its characteristic citrus-like aroma, it serves as a valuable building block in organic synthesis and a key intermediate in the fragrance and flavour industries. Its optical activity and chiral nature make it important for stereoselective reactions.
- IUPAC
- (S)-3,7-Dimethyl-6-octenal
- Synonyms
- (S)-3,7-Dimethyl-6-octenal

Fragrance and Flavour Industry
Citronellal is widely used as a fragrance component in perfumes, cosmetics, and household products, imparting a fresh, lemony scent. It is also employed as a flavouring agent in food and beverages.
Organic Synthesis Intermediate
As a chiral building block, (–)-Citronellal is utilized in the synthesis of more complex organic molecules, including pharmaceuticals and fine chemicals. Its aldehyde functionality allows for a variety of chemical transformations.
Research and Development
This compound is employed in academic and industrial research for developing new synthetic methodologies and exploring novel chemical entities. Its well-defined structure and reactivity make it a useful model compound.
| Molecular weight | 154.25 |
|---|---|
| Empirical formula | C10H18O |
| Assay | ≥98.0% (sum of enantiomers, GC) |
| Grade | purum |
| Density | 0.851 g/mL at 20 °C(lit.) |
| Refractive index | n20/D 1.447 |
| Optical activity | [α]20/D −16±1°, neat |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 75 °C / 167 °F |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is (–)-Citronellal used for?
+
(–)-Citronellal is used as a fragrance and flavour ingredient, and as a chiral building block in organic synthesis for creating complex molecules.
What is the CAS number and formula for (–)-Citronellal?
+
The CAS number for (–)-Citronellal is 5949-05-3, and its molecular formula is C10H18O.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies (–)-Citronellal with a purity of ≥98.0% (sum of enantiomers, GC) and a grade of purum. We do not represent this product as USP, BP, or EP grade unless explicitly stated.
How should (–)-Citronellal be handled safely?
+
(–)-Citronellal is a warning hazardous substance (H315, H319, H335). Handle with appropriate personal protective equipment, including eyeshields, gloves, and a suitable respirator, in a well-ventilated area. Avoid contact with skin, eyes, and inhalation of vapours.
How is (–)-Citronellal packed and shipped?
+
(–)-Citronellal is carefully packed according to international shipping regulations to ensure safe transit. Tech Serve Solutions is a global supplier and exporter, experienced in shipping fine chemicals worldwide.
How can I request a sample or quote for (–)-Citronellal?
+
To request a sample or a quotation for (–)-Citronellal, please contact our sales department through the website or by telephone, providing your specific requirements.
▶ Related products

1-(2-Fluorobenzyl)piperazine
C11H15FN2
Chemical Synthesis
1-(2-Fluorophenyl)biguanide hydrochloride
Chemical Synthesis

1-(2-Fluorophenyl)cyclopropanecarboxylic acid
C10H9FO2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine
C10H13FN2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine monohydrochloride
C10H13FN2 · HCl
Chemical Synthesis
1-(2-Furoyl)-1H-benzotriazole
C11H7N3O2
Chemical Synthesis
1-(2-Furoyl)piperazine
C9H12N2O2
Chemical Synthesis
1-(2-Hydroxy-5-methylphenyl)-3-phenyl-1,3-propanedione
Chemical Synthesis
▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis