Silvial®
Synthétique
Floral > Light Flowers > Aldehydic > Aquatic
Crédits photo: ScenTree SAS
Other names :
Alpha-methyl-4-(2-methylpropyl) benzenepropanal ; Para-isobutyl-alpha-methyl hydrocinnamaldehyde ; Aldéhyde para-isobutyl-alpha-methyl hydrocinnamique ; 3-(4-isobutylphenyl)-2-methylpropanal ; 3-(para-cumenyl)-2-methyl propionaldehyde ; Cyclamen homoaldehyde ; Homoaldehyde cyclamen ; 2-methyl-3-(4-(2-methyl propyl)phenyl) propanal ; Rhodial ; Suzaral
Volatility :
Heart
Uses in perfumery :
Silvial® is usually used to replace regulated aldehydes as Lilial® or Lyral® in lily of the valley accords for example. It brings a powerful and fresh note, with a floral identity.
Natural availability :
Sylvial® is not found in nature. Thus, it is not extracted from any plant.
Year of discovery :
Patent N°1.430.164 (FR) published on Nov.13, 1964 by Rhône-Poulenc company
Other comments :
Sylvial® has a structure close to Lilial®, Cyclamen Aldehyde®, Bourgeonal® and Florhydral®. Eac of these molecules have a light flower smell, with a more marine nuance for Cyclamen Aldehyde®, greener for Bourgeonal® and fruitier for Florhydral® for example.
Price Range :
€€
Stability :
Very unstable in stong acidic (detergents) and alkaline (liquid bleach) bases. Stable in other types of bases.
Crédits photo: ScenTree SAS
- Molecular formula :
- C14H20O
- Molecular Weight :
- 204,31 g/mol
- Density :
- 0,94
- Flash Point :
- 120°C
- Fusion Point :
- Donnée indisponible.
- Appearance :
- Colorless liquid
- Log P :
- 4,7
- Boiling Point :
- 245°C
- Detection Threshold :
- 0,7 ng/L air
Synthesis route :
As it has a structure close to Lilial® and Cyclamen Aldehyde®, the synthesis of Silvial® can be made in two different ways. The first one consists in a condensation of two aldehydes : 4-isobutylbenzaldehyde and Acetaldehyde, using an excess of the first reagent, and adding the second one slowly, to prevent autocondensation of Acetaldehyde. Then, a catalytic hydrogenation of the obtained product leads to Silvial®. The second synthetic route is a Friedel and Craft reaction involving isobutylbenzene and Methacrolein diacetate, followed by subsequent acidic hydrolysis of the intermediary product.
Synthesis precursor :
Reacting with Methyl Anthranilate, Silvial® can help synthesizing its Schiff base, although it is very poorly used.
Isomerism :
Silvial® has one asymmetric carbon. Nevertheless, a mixture of these two molecules is used in perfumes. Also, ortho and meta isomers of Silvial® are not used in perfumery. Eventually, Lilial® is a positional isomer of Silvial®. Its smell is fresher and fruitier, and less aqueous.
- EINECS number :
- 229-695-0
- FEMA number :
- Donnée indisponible.
- JECFA number :
- Donnée indisponible.
- FLAVIS number :
- Donnée indisponible.
- Allergens :
- This ingredient does not contain any allergen.
- IFRA :
- This ingredient is restricted by IFRA
- Restriction type :
- RESTRICTION
- Cause of restriction :
- DERMAL SENSITIZATION AND SYSTEMIC TOXICITY
- Amendment :
- 49
- Quantitative limit on the use :
-
Cat.1 Cat.2 Cat.3 Cat.4 Cat.5A Cat.5B Cat.5C Cat.5D Cat.6 0,08 % 0,053 % 0,8 % 0,99 % 0,25 % 0,25 % 0,25 % 0,083 % 0,08 % Cat.7A Cat.7B Cat.8 Cat.9 Cat.10A Cat.10B Cat.11A Cat.11B Cat.12 0,72 % 0,72 % 0,083 % 1,9 % 1,9 % 5,4 % 0,083 % 0,083 % No Restriction - Restriction type :
- RESTRICTION
- Cause of restriction :
- DERMAL SENSITIZATION AND SYSTEMIC TOXICITY
- Amendment :
- 49
- Comments :
- The Standard is set due to the phototoxic effects of Acetyl hexamethyl indan (AHMI). For more detailed information on the application of this Standard, please refer to the note on phototoxic ingredients in chapter 1 of the Guidance for the use of IFRA Standards.
- Quantitative usage limits :
-
Cat.1 Cat.2 Cat.3 Cat.4 Cat.5 Cat.6 Cat.7 Cat.8 Cat.9 Cat.10 Cat.11 0,08 % 0,053 % 0,8 % 0,99 % 0,25 % 0,08 % 0,72 % 0,083 % 1,9 % 1,9 % 0,083 %
To learn more about IFRA's standards : https://ifrafragrance.org/safe-use/library
ScenTree is solely responsible for the information provided here.
