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alpha-Terpineol(CAS#98-55-5) Featured Image
  • alpha-Terpineol(CAS#98-55-5) 1

alpha-Terpineol(CAS#98-55-5)

Chemical Property:

Molecular Formula C10H18O
Molar Mass 154.25
Density 0.93 g/mL at 25 °C (lit.)
Melting Point 31-35 °C (lit.)
Boling Point 217-218 °C (lit.)
Flash Point 90 °C
JECFA Number 366
Water Solubility negligible
Solubility 0.71g/l
Vapor Presure 6.48Pa at 23℃
Appearance Transparent colorless liquid
Specific Gravity 0.9386
Color Clear colorless
Merck 14,9171
BRN 2325137
pKa 15.09±0.29(Predicted)
Storage Condition 2-8°C
Refractive Index 1.482-1.485
MDL MFCD00001557
Physical and Chemical Properties Terpineol has three isomers: α,β, and γ. According to its melting point, it should be solid, but the synthetic products sold on the market are mostly liquid mixtures of these three isomers.
α-terpineol has three types: right-handed, left-handed and racemic. D-α-terpineol naturally exists in cardamom oil, sweet orange oil, orange leaf oil, neroli oil, jasmine oil and nutmeg oil. L-α-terpineol naturally exists in pine needle oil, camphor oil, cinnamon leaf oil, lemon oil, white lemon oil and rose wood oil. β-terpineol has cis and trans isomers (rare in essential oils). γ-terpineol exists in the form of free or ester in cypress oil.
The mixture of α-terpineol is used in spices. It is a colorless viscous liquid. It has a unique clove aroma. Boiling point 214~224 ℃, relative density d25250.930 ~ 0.936. Refractive index nD201.482 ~ 1.485. Insoluble in water, soluble in ethanol, propylene glycol and other organic solvents. Alpha-terpineol is found in leaves, flowers and grass stems of more than 150 plants. D-optically active body exists in essential oils such as cypress, cardamom, star anise, and orange blossom. L-optically active body exists in essential oils such as lavender, melaleuca, white lemon, cinnamon leaf, etc.
Figure 2 shows the chemical structural formulas of the three isomers of terpineol α,β, and γ

Product Detail

Product Tags

Hazard Symbols Xi – Irritant
Risk Codes R10 – Flammable
R38 – Irritating to the skin
R36/37/38 – Irritating to eyes, respiratory system and skin.
Safety Description S16 – Keep away from sources of ignition.
S37 – Wear suitable gloves.
S26 – In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S37/39 – Wear suitable gloves and eye/face protection
UN IDs UN1230 – class 3 – PG 2 – Methanol, solution
WGK Germany 1
RTECS WZ6700000
TSCA Yes
HS Code 29061400

 

Introduction

α-Terpineol is an organic compound. The following is an introduction to the properties, uses, preparation methods and safety information of α-terpineol:

 

Quality:

α-Terpineol is a colorless liquid with a special aromatic odor. It is a volatile substance that is soluble in organic solvents, but it is almost insoluble in water.

 

Use:

α-Terpineol has a wide range of applications. It is often used as an ingredient in flavors and fragrances to give products a special aromatic smell.

 

Method:

α-Terpineol can be synthesized by a variety of methods, one of the commonly used methods is obtained by the oxidation of terpenes. For example, oxidizing terpenes to α-terpineol can be used using oxidizing agents such as acidic potassium permanganate or oxygen.

 

Safety Information:

α-Terpineol has no obvious danger under general conditions of use. As an organic compound, it is volatile and flammable. When using, care should be taken to avoid direct contact with eyes, skin, and use. In case of contact with skin or eyes, rinse with plenty of water. Avoid use and storage near fire, and maintain a well-ventilated working environment.

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