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| | ALPHA-TERPINENE Basic information |
| | ALPHA-TERPINENE Chemical Properties |
| Melting point | -59.03°C (estimate) | | Boiling point | 173-175 °C(lit.) | | density | 0.837 g/mL at 25 °C(lit.) | | vapor pressure | 2.22hPa at 25℃ | | FEMA | 3558 | P-MENTHA-1,3-DIENE | | refractive index | n20/D 1.478(lit.) | | Fp | 115 °F | | storage temp. | 2-8°C | | solubility | 95% ethanol: soluble1ml/2ml, clear, colorless | | form | Liquid | | Specific Gravity | 0.84 | | color | Clear colorless to light yellow | | Odor | at 10.00 % in dipropylene glycol. woody terpene lemon herbal medicinal citrus | | Odor Type | woody | | Water Solubility | Soluble in ether, alcohol, and ethanol (100 mg/ml). Insoluble in water. | | Merck | 14,9170 | | JECFA Number | 1339 | | BRN | 1853379 | | Stability: | Light Sensitive | | LogP | 5.3 at 35℃ | | EPA Substance Registry System | 1,3-Cyclohexadiene, 1-methyl-4-(1-methylethyl)- (99-86-5) |
| Hazard Codes | Xn,N,Xi | | Risk Statements | 10-22-36/37/38-51/53 | | Safety Statements | 26-36/37-61-62-36 | | RIDADR | UN 2319 3/PG 3 | | WGK Germany | 2 | | RTECS | OS8060000 | | F | 10-23 | | TSCA | Yes | | HazardClass | 3.2 | | PackingGroup | III | | HS Code | 29021990 | | toxicity | The acute oral LD50 value in rats was reported as 1.68 g/kg (1*46-1 -90 g/kg) (Moreno, 1973). Because of its action as a liver poison and methaemoglobin former, α-terpinene should be used very sparingly, or not at all, in foods (B?r & Griepentrog, 1967). |
| | ALPHA-TERPINENE Usage And Synthesis |
| Chemical Properties | clear colorless to light yellow liquid | | Chemical Properties | p-Mentha-1,3-diene has a woody, terpene, lemon odor with a lemony flavor, becoming bitter at high levels. | | Occurrence | Reported found in roots, stems, leaves and flowers of Echinacea species. Also reported found in in tea tree oil,
papaya fruit, grapefruit, lemon, lime, mandarin, oranage, spearmint, citrus peel oils, cranberry, currants, guava, grapes, raspberry,
peach, carrot, celery, cinnamon, clove, cumin seed, ginger, peppermint and corn mint oils, other mentha oils, nutmeg, pepper, mace,
parsley, thymus, rum, tea, filberts, pecans, soybeans, passion fruit, beans, sweet marjoram, starfruit, mango, cardamom, coriander
seed, origanum, prickly pear, litchi, calamus, dill herb, lovage seed and leaf, juniper berries, laurel, fennel, rosemary, buchu oil, tur meric, sage, nectarines and many other sources. | | Uses | It can be used as a chemical fragrance essential oil and spices. It is used as a flavoring and fragrance chemical used in the personal care and cosmetic and food industries. Also used in the pharmaceutical, electronics, food processing, semi-conductor manufacturing industries. | | Uses | α-Terpinene is suitable for use in a study to evaluate the antimycotic properties of Melaleuca alternifolia essential oil (tea tree oil, TTO). 1 It is suitable for use to investigate the in vitro antibacterial activity of the essential oils extracted from the fruits of Coriandrum sativum L. and Foeniculum vulgare Miller var. vulgare (Miller). | | Preparation | May be obtained by isolation from the terpene fraction of sweet orange oil or orange terpenes (8 to 10% of the total
monoterpenes); by isolation from fractions of American turpentine oil; from 1-methyl-4-isopropylcyclohexadien-1,3-one-2; also from
terpinene dihydrochloride with aniline. | | Definition | ChEBI: Alpha-terpinene is one of three isomeric monoterpenes differing in the positions of their two double bonds (beta- and gamma-terpinene being the others). In alpha-terpinene the double bonds are at the 1- and 3-positions of the p-menthane skeleton. It has a role as a volatile oil component and a plant metabolite. It is a monoterpene and a cyclohexadiene. | | Aroma threshold values | Aroma characteristics at 10%: citrusy, woody, terpy with camphoraceous and thymol notes; it has spicy
and juicy citrus nuances. | | Taste threshold values | Taste characteristics at 5 to 100 ppm: terpy, woody, piney, citrus lemon and lime with spice and mint
nuances. | | General Description | α-Terpinene, a volatile essential oil derived from Melaleuca alternifolia, shows antimicrobial properties against various human pathogens. | | Flammability and Explosibility | Flammable | | Biochem/physiol Actions | Odor at 10% | | Pharmacology | Combinations of terpenes, such as terpinene, with nonionic surfactants and stabilizers
have been patented for use as gallstone solvents. Artificial or human cholesterol calculi placed
in terpinene with or without human bile at 37°C were dissolved within 1-2 hr (Hisamitsu Pharmaceutical
Co., Inc., 1973). | | Safety Profile | Moderately toxic by
ingestion. When heated to decomposition it
emits acrid smoke and irritating fumes. |
| | ALPHA-TERPINENE Preparation Products And Raw materials |
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