Photo credits: ScenTree SAS
Alpha-Terpinene
Citrus > Zesty > Citric > Terpenic
1-methyl-4-propan-2-ylcyclohexa-1,3-diene ; 1-methyl-4-isopropyl-1,3-cyclohexadiene ; Para-mentha-1,3-diene ; 1,3-para-menthadiene ; 4-methyl-1-(1-methylethyl)-1,3-cyclohexadiene ; 1-methyl-4-(1-methyl ethyl)-1,3-cyclohexadiene ; 1-isopropyl-4-methyl-1,3-cyclohexadiene
Photo credits: ScenTree SAS
General Presentation
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CAS N° :
99-86-5 -
EINECS number :
202-795-1 -
FEMA number :
3558 -
FLAVIS number :
1,019
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JECFA number :
1339 -
Volatility :
Head -
Price Range :
€
Physico-chemical properties
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Appearance :
Colorless liquid -
Density :
0,837 -
Refractive Index @20°C :
Donnée indisponible. -
Optical rotation :
Donnée indisponible. -
Vapor pressure :
Donnée indisponible. -
Flash Point :
50°C (122°F)
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Molecular formula :
C10H16 -
Molecular Weight :
136,24 g/mol -
Log P :
Donnée indisponible. -
Fusion Point :
Donnée indisponible. -
Boiling Point :
174°C (345,2°F) -
Detection Threshold :
Donnée indisponible.
Chemistry & Uses
Uses in perfumery :
Alpha-Terpinene is used in fruity and exotic notes, especially in mango for a spicy touch. Also used in woody and spicy notes, for freshness and a powerful top note.
Year of discovery :
Data not available.
Natural availability :
Alpha-Terpinene is found in many plant extracts, including Bergamot EO, Juniper Berry EO and Lime EO. It can be extracted from these plants essential oils.
| Ingredient | % min | % max |
|---|---|---|
| Cumin seed oil | 0.10 | 0.30 |
| Mace oil | 4 | |
| Mandarin oil (yellow) | 15 | 20 |
| Mandarin oil (red) | 15 | 20 |
| Mandarin oil (green) | 15 | 20 |
| Sweet marjoram oil | 6 | 8 |
| Origanum oil | 0.50 | 2 |
| Zygis thyme oil | 0.90 | 2.60 |
Isomerism :
Alpha-Terpinene differs from beta-Terpinene, gamma-Terpinene and delta-Terpinene, its isomers. They all have a different smell. alpha-Terpinene is the most medicinal and most reminiscent of Lime EO. D-Limonene, Pinene, Myrcene and Ocimene are the constitutional isomers of Terpinene. They all belong to the terpene family, whose common point is that they can be synthesized by a Diels-Alder reaction, starting from Isoprene.
Synthesis precursor :
Alpha-Terpinene can be a precursor to the synthesis of other terpenes, for example by a Diels-Alder reaction.
Synthesis route :
Alpha-Terpinene is a terpene obtained by an isomerization of D-Limonene in an acidic medium.
Stability :
Terpenes tend to polymerize by oxydation.
Very unstable in alkaline functional bases as soap. In this base, its smell in not percievable.
Other comments :
In comparision to other terpenes, Alpha-Terpinene has a distinctive smell close to Lime EO.
Labelling
Allergens :
This ingredient is classified as an allergen under European Regulation 2023/1545, dated August 26, 2023.
Its presence must therefore be declared on product labels when it exceeds 0.001% in leave-on products and 0.01% in rinse-off products.
Signal word :
Warning
Hazard pictograms :
Precautionary statements :
| HAZARD | PRECAUTION |
|---|---|
| H226 Flammable liquid and vapour.
H302 Harmful if swallowed. H315 Causes skin irritation. H319 Causes serious eye irritation. H335 May cause respiratory irritation. H411 Toxic to aquatic life with long lasting effects. |
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. P233 Keep container tightly closed. P240 Ground and bond container and receiving equipment. P241 Use explosion-proof [electrical/ventilating/lighting/…] equipment. P242 Use non-sparking tools. P243 Take action to prevent static discharges. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash ... thoroughly after handling. P270 Do no eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301 + P312 IF SWALLOWED: Call a POISON CENTER/doctor/… if you feel unwell. P303 + P361 + P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water [or shower]. P304 + P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P312 Call a POISON CENTER/doctor/… if you feel unwell. P321 Specific treatment (see ... on this label). P330 Rinse mouth. P332 + P313 If skin irritation occurs: Get medical advice/attention. P337 + P313 If eye irritation persists: Get medical advice/attention. P362 Take off contaminated clothing. P370 + P378 In case of fire: Use… to extinguish. P391 Collect spillage. P403 + P233 Store in a well-ventilated place. Keep container tightly closed. P403 + P235 Store in a well-ventilated place. Keep cool. P405 Store locked up. P501 Dispose of contents/container to… |
IFRA
IFRA 51th :
This ingredient is not restricted for the 51th amendment
