D,l-Limonene

Crude turpentine is distilled to obtain refined products used in the fragrance and flavour industry. Only the unsaturated mono- and bicyclic terpenes are of interest for resin production. These are mainly a-pinene, p-pinene and dipentcne (D,L-limonene) (Fig. 17). D-Limonene is obtained by extraction of orange peel in citrus fruits. [Pg.610]

Dehydrogenation of dipentene (d,l-limonene) and 4-vinylcyclohexene has been studied using both the lithium-ethylenediamine catalyst system (4) and the sodium-alumina catalyst system (12). The aromatic compounds p-cymene and ethylbenzene are produced by both types of catalyst however, while vinylcyclohexene yields ethylbenzene rapidly at 0° over a sodium on alumina catalyst, dipentene yields mainly mixed dienes at 0 but at 25 is also rapidly dehydrogenated to p-cymene (12). [Pg.124]

SYNS FENL-t No. 2633 (-H)-4-ISOPROPENYL-l-METHYLCYCLOHEXENE d-(-l-)-LIMONENE (-l-)-R-LLMONENE d-p-MENTHA-1,8-DIENE j MENTHA-1,8-DIENE D (R)-l-METHYL-4-(l-METHYLETHENYL). CYCLOHEXENE NCI-C55572... [Pg.837]

Chemical Abstracts Service Registry Number CAS 5989-27-5 (Closely related to o-Limonene are L-Limonene (CAS 5989-54-8), Chemical Name (S)-l-Methyl-4-(l-methylethenyl) cyclohexene D,L-Limonene (commonly known as Dipen-tene) is a mixture of the above two isomers. The isomers are chemically identical except that their molecular structures are mirror images of one another (optical isomers) (CAS 138-86-3), Chemical Name l-Methyl-4-(l-methylethenyl) cyclohexene) Synonyms o-Limonene 4-Isopropenyl-l-methyl-cyclohexene (R)-( + )-Limonene ( + )-Limonene D-( + )-Limonene (o)-Limonene Limonene ... [Pg.1531]

On the other hand, a-pinene is first isomerized to the dipentene (d,l-limonene) with cationic polymerization catalysts, and the dipentene then polymerizes ... [Pg.423]

Figure 3.3-4. Concentration vs time profiles for emission of selected VOCs from coated surfaces and cabinet furniture. A limonene (ECO, painting) B tripropyleneglycol diacrylate (UV-cured, roller coating) C benzophenone (UV-cured, roller coating) D l-butanol-3-methoxy-acetate (NC, spray coating). The upper and lower curves in C and D represent cabinet air and chamber air, respectively. The test chamber conditions were T =23 °C, r.h. = 45 %, V = 1.0 h L = 1.0 rrfixtf.

Definition Derived from Piper nigrum] main constituents incl. a and p-pinene, p-caryophyllene, l-limonene, d-hydrocarveol, piperidine Toxicology Primary irritant mod. skin irritant mutagenic data TSCA listed Hazardous Decomp. Prods. Heated to decomp., emits acrid smoke and fumes Uses Natural flavoring agent in foods and pharmaceuticals... [Pg.542]

Dipentene. See l-Limonene Dipentene (INCI). See dl-Limonene Dipentenedimercaptan. See D-Limonene dimercaptan... [Pg.1495]

Lime pyrolignite. See Calcium acetate Lime saltpeter. See Calcium nitrate Lime, slaked. See Calcium hydroxide Limestone. See Calcium carbonate Lime sulfur. See Calcium polysulfide Lime-tree extract. See Linden (Tilia americana) extract Linden (Tilia cordata) extract Linden (Tilia vulgaris) extract Lime water. See Calcium hydroxide Limnanthes alba. See Meadowfoam (Limnanthes alba) seed oil (-)-Limonene. See l-Limonene (+)-Limonene. See d-Limonene d-Limonene... [Pg.2400]

See also d-Limonene dl-Limonene l-Limonene a-Pinene p-Pinene... [Pg.4337]

Isopropyl hexanoate Isopropyl isobutyrate Isopropyl isovalerate Isopropyl myristate p-Isopropylphenylacetaldehyde Isopropyl phenylacetate 3-(p-lsopropylphenyl) propionaldehyde Isopropyl propionate Isopropyl tiglate Isopulegol Isopulegone Isopulegyl acetate Isoquinoline Isosafrole Isovaleraldehyde Isovaleric acid cis-Jasmone Laurie aldehyde Lauryl acetate Lauryl alcohol Lepidine Levulinic acid d-Limonene dl-Limonene l-Limonene... [Pg.5284]

Lepidine d-Limonene l-Limonene Linalool oxide Linalyl anthranilate Linalyl benzoate Linalyl butyrate Linalyl cinnamate Linalyl formate Linalyl isobutyrate... [Pg.5323]

Ammonium caprylate 227-806-7 Ocimenol 227-813-5 Citrosperse 120 Citrus Stripper Oil d-Limonene Orange Terpenes 227-815-6 l-Limonene 227-833-4... [Pg.6852]

Amylcyclopentenone Cam phene 3-Carene Didehydropinane d-Limonene dl-Limonene l-Limonene p-Menthadiene Myrcene Ocimene o-Phellandrene (+)-a-Phellandrene a-Pinene P-Pinene a-Terpinene y-Terpinene Terpinolene (CioHie)x Polydipentene CioHieBrN... [Pg.7068]

Dipentene corresponds to a racemic mixture of D-limonene and L-limonene. Dipentene can be prepared from wood turpentine or by synthesis. It is used as a solvent for waxes, rosin and gums, in printing inks, perfumes, rubber compounds, paints, enamells, and lacquers. As an irritant and sensitizer, dipentene has caused contact dermatitis mainly in painters, polishers and varnishers. [Pg.1147]

Rate constants for gas-phase ozonation of keto-limonene and the mechanism of the reaction have been, respectively, calculated and investigated using transition state theory at the CCSD(T)/6-31G(d) -l- CF//B3LYP/6-31G(d,p) level and ab initio methods. Two different possibilities for ozonation of the double bond are considered and the corresponding van der Waals complexes are found for 1-endo and 2-endo variants. ... [Pg.142]

The detection of the chirality of a compound is important especially in flavors and fragrances because opposing enantiomers may have a totally different odor and taste profile (e.g., L-menthol (56) is minty, fresh, and cool, whereas D-menthol (56b) is minty, medicinal, and camphor-like L-carvone (57) has spearmint, costmary like odor, whereas D-carvone (57b) is like caraway and dill L-limonene (58) is like turpentine, whereas D-limonene (58b) is like orange) (1, 2, 5, 11-15, 31,43). [Pg.395]

Carthamus tinctorius hybrid oii Carthamus tinctorius oil. See Hybrid safflower (Carthamus tinctorius) oil Catvene. See l-Limonene (+)-Carvene. See d-Limonene Casamino acid. See Hydrolyzed protein Casein... [Pg.2020]

Menhaden oil, hydrogenated. See Hydrogenated menhaden oil (+)-1,8-p-Menthadiene. See d-Limonene 1,4-(8)-p-Menthadiene. See Terpinolene 1,8(9)-p-Menthadiene dl-p-Mentha-1,8-diene. See dl-Limonene d-p-Mentha-1,8-diene. See d-Limonene l-p-Mentha-1,8-diene. See l-Limonene p-Mentha-1,8-diene. See d-Limonene dl-Limonene p-Mentha-1,8-diene, (S)-(-)-. See l-Limonene... [Pg.2203]

Methyl methacrylate homopolymet Methyl methacrylate polymer Methyl methacrylate polymers Methyl methacrylate resin. See Polymethyl methacrylate 2-Methyl-3-(para-methoxy phenyl)-ptopanal. See Canthoxal a-Methyl-ro-methoxypolydimethylsiloxane. See Dimethylsiloxane 1 -Methyl-4 (1 -methylethenyl) cyclohexene. See dl-Limonene 1-Methyl-4-(1-methylethenyl)-(S)-cyclohexene. See l-Limonene (R)-1-Methyl-4-(1-methylethenyl)-cyclohexene. See d-Umonene 1-Methyl-4-(1-methylethyl) benzene. See p-Cymene 1-Methyl-4-(1-methylethylidene) cyclohexene. See Terpinolene Methyl-2(methyl-2) oxybispropanol. See Dipropylene glycol Methyl-2-methyl-2-propenoate. See Methyl methacrylate Methylmorpholine 4-Methyl morpholine N-Methyl morpholine. See p-Methyl morpholine p-Methyl morpholine CAS 109-02-4 EINECS/ELINCS 203-640-0 UN 2535 (DOT)... [Pg.2214]

The value of marketed spectra databases is offset by certain inconveniences. Some show more compounds than mass spectra, which means that some compounds were recorded several times. For example, one can find the mass spectra of D-limonene (limonene is a terpene presenting an asymmetrical carbon), L-limonene, and the racemic mixture. The three mass spectra are obviously the same since mass spectrometry (that may not distinguish isomers) does not allow differentiation of enantiomers ... [Pg.142]

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