(CAS:5392-40-5) CITRAL
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CITRAL (CAS: 5392-40-5)
🔍 Professional Summary
Citral is a natural fragrance compound composed of an equal mixture of Geranial (trans-citral) and Neral (cis-citral). It is known for its strong, fresh lemon scent. It is primarily extracted from natural essential oils such as citronella, lemon, and lemongrass oils. It is widely used in the fragrance, flavor, cosmetic, and detergent industries to impart a citrusy, refreshing note.
🌸 Olfactory Description
- Fragrance Family: Citrus
- Main Notes: Fresh lemon, vibrant, green, herbal
- Secondary Notes: Slightly earthy, oily, soft acidic
⚠️ Safety & Handling
- Classified as a potential skin irritant and sensitizer.
- Avoid direct contact with eyes and concentrated exposure.
- Recommended at low percentages especially in skin-contact applications.
🧪 Chemical Profile
|
Property |
Value |
|
Trade Name |
Citral |
|
Chemical Name |
3,7-Dimethyl-2,6-octadienal |
|
CAS Number |
5392-40-5 |
|
EC Number |
226-394-6 |
|
Molecular Formula |
C₁₀H₁₆O |
|
Molecular Weight |
152.23 g/mol |
|
Isomers |
Geranial (trans) / Neral (cis) |
⚗️ Physical Properties
|
Property |
Value |
|
Appearance |
Clear pale yellow liquid |
|
Odor |
Strong lemony, citrus, fresh |
|
Density |
0.888 - 0.894 g/cm³ at 20°C |
|
Boiling Point |
229 - 230°C |
|
Melting Point |
-10 to -8°C |
|
Flash Point |
92°C (closed cup) |
|
Solubility |
Insoluble in water, soluble in alcohols/oils |
|
Vapor Pressure |
0.04 mmHg at 25°C |
|
Stability |
Unstable in light and oxygen |
👃 Sensory Evaluation
|
Attribute |
Observation |
|
Intensity |
Very strong |
|
Temporal Profile |
Top and heart note, fades gradually |
|
Balance |
Neral is softer, Geranial is sharper |
|
General Impression |
Bright, clean, enhances freshness |
🧪 Aromatic Structure Breakdown
|
Component |
Approx. Percentage |
CAS Number |
|
Geranial |
~50% |
5392-40-5 |
|
Neral |
~50% |
106-26-3 |
🎶 Suggested Fragrance Accords
🍋 Citrus Accord
|
Component |
Percentage |
CAS Number |
|
Citral |
40% |
5392-40-5 |
|
Limonene |
30% |
5989-27-5 |
|
Citronellal |
20% |
106-23-0 |
|
Aldehyde C-8 |
10% |
124-13-0 |
🌿 Herbal Accord
|
Component |
Percentage |
CAS Number |
|
Citral |
35% |
5392-40-5 |
|
Linalool |
25% |
78-70-6 |
|
Geraniol |
25% |
106-24-1 |
|
Cis-3-Hexenol |
15% |
928-96-1 |
🍏 Fruity Accord
|
Component |
Percentage |
CAS Number |
|
Citral |
30% |
5392-40-5 |
|
Ethyl Maltol |
25% |
4940-11-8 |
|
Aldehyde C-8 |
25% |
124-13-0 |
|
Isoamyl Acetate |
20% |
123-92-2 |
🌸 White Floral Accord
|
Component |
Percentage |
CAS Number |
|
Citral |
25% |
5392-40-5 |
|
Hydroxycitronellal |
30% |
107-75-5 |
|
Nerol |
25% |
106-25-2 |
|
Phenyl Ethyl Alcohol |
20% |
60-12-8 |
🧴 Applications by Category
|
Category |
Usage Description |
|
Perfumes |
Core and heart in citrus and floral blends |
|
Cosmetics |
Skin fresheners, creams, shampoos |
|
Detergents |
Adds freshness to cleaning products |
|
Flavoring |
Used in food-grade flavors (low concentration) |
📄 IFRA Regulatory Limits
- Standard: As per IFRA – Substance: Citral
- IFRA Link: https://ifrafragrance.org/standards/IFRA_STD_015.pdf
|
Product Category |
Maximum Level (%) |
|
Leave-on products |
0.6% |
|
Rinse-off products |
1.25% |
|
Fine Fragrances |
2.5% |
|
Deodorants |
0.2% |
🔗 External References
- PubChem - Citral: https://pubchem.ncbi.nlm.nih.gov/compound/5392-40-5
- ECHA - Substance Citral: https://echa.europa.eu/substance-information/-/substanceinfo/100.009.631
- Wikipedia - Citral: https://en.wikipedia.org/wiki/Citral
- IFRA - Substance Citral: https://ifrafragrance.org/standards/IFRA_STD_015.pdf
🏁 Conclusion
Citral is a cornerstone ingredient in the world of natural perfumery, delivering an irreplaceable citrus sparkle in top notes.
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