A MIXTURE COMPRISING 1,2-ALKANEDIOLS

Abstract

Suggested is mixture comprising or consisting of (a) at least one 1,2-alkanediol (b) at least one malodor causing compound existing as an impurity or degradation product within 1,2-alkanediols, and (c) at least one malodor reduction material having a Malodor Reduction Value (MORV) of at least 0.5
with improved odour properties.

Claims

1. A mixture comprising or consisting of (a) at least one 1,2-alkanediol (b) at least one malodor causing compound existing as an impurity or degradation product within 1,2-alkanediols, and (c) at least one malodor reduction material having a Malodor Reduction Value (MORV) of at least 0.5.

2. The mixture of claim 1 wherein the 1,2-alkanediols (component a) are selected from the group consisting of 1,2-pentanediol, 1,2-hexanediol, 1,2-heptanediol, 1,2-octanediol, 1,2-nonanediol, 1,2-decanediol, 1,2-undecanediol, 1,2-dodecandiole and their mixtures.

3. The mixture of claim 2, wherein said 1,2-alkanediol is selected from 1,2-hexanediol, 1,2-octanediol and mixtures thereof.

4. The mixture of claim 1 wherein said malodor causing compounds (component b) are selected from the group consisting of (b1) butyric acid, valeric acid, caproic acid, enanthic acid, caprylic acid, pelargonic acid, capric acid, and methyl-, ethyl-esters thereof. 1-hexene-3-one, 1-heptene-3-one, 1-octene-3-one, 1-nonene-3-one, 1-decene-3-one, octalactone, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 2-ethyl-1-butene, 2-ethyl-1-pentene, 2-ethyl-1-hexene, 2-ethyl-1-heptene, 2-ethyl-1-octene, cis-3-methyl-2-pentene, cis-3-methyl-2-hexene, cis-3-methyl-2-heptene, cis-3-methyl-2-octene, cis-3-methyl-2-nonene, trans-3-methyl-2-pentene, trans-3-methyl-2-hexene, trans-3-methyl-2-heptene, trans-3-methyl-2-octene, trans-3-methyl-2-nonene, n-hexane, n-heptane, n-octane, n-nonane, n-decane, cis-2-hexene, cis-2-heptene, cis-2-octene, cis-2-nonene, cis-2-decene, trans-2-hexene, trans-2-heptene, trans-2-octene, trans-2-nonene, trans-2-decene, cis-3-hexene, cis-3-heptene, cis-3-octene, cis-3-nonene, cis-3-decene, trans-3-hexene, trans-3-heptene, trans-3-octene, trans-3-nonene, trans-3-decene, cis-2,3-hexanediol, cis-2,3-heptanediol, cis-2,3-octanediol, cis-2,3-nonenediol, cis-2,3-decanediol, trans-2,3-hexanediol, trans-2,3-heptanediol, trans-2,3-octanediol, trans-2,3-nonenediol, trans-2,3-decanediol, cis-3,4-hexanediol, cis-3,4-heptanediol, cis-3,4-octanediol, cis-3,4-nonenediol, cis-3,4-decanediol, trans-3,4-hexanediol, trans-3,4-heptanediol, trans-3,4-octanediol, trans-3,4-nonenediol, trans-3,4-decanediol, 3-methylpentane-2,3-diol, 3-methylhexane-2,3-diol, 3-methylheptane-2,3-diol, 3-methyloctane-2,3-diol, 3-methylnonane-2,3-diol, 2-ethylbutane-1,2-diol, 2-ethylpentane-1,2-diol, 2-ethylhexane-1,2-diol, 2-ethylheptane-1,2-diol, 2-ethyloctane-1,2-diol, or mixtures thereof, or (b2) or one, two, three or more compounds according to one of the following formulas (I) to (IV) ##STR00002## in which R stands for a linear branched alkyl radical having 1 to 10 carbon atoms, including all cis and trans stereoisomers, and

5. The mixture of claim 1, wherein the at least one malodor reduction material having a Malodor Reduction Value (MORV) of at least 0.5 (component c) is selected from the group consisting of: ((1s,4s)-4-isopropylcyclohexyl)methanol ()-alpha-Pinene ()-Citroneliol (+)-alpha-Pinene (+)-Carvone (+)-Citronellol (+)-Dihydrocarveol (1R, 5R)-4,6,6-trimethylbicyclo[3.1.1]hept-3-en-2-one (1s,4s)-4-isopropylcyclohexyl)methanol (2,2-dimethoxyethyl)benzene (2Z,5Z)-5,6,7-trimethylocta-2,5-dien-4-one (2Z,6E)-nona-2,6-dienenitrile (3Z)-1-(2-buten-1-yloxy)-3-hexene (d)-Citronelial (E)-1-(1-methoxypropoxy)hex-3-ene (E)-1-1-methoxypropoxylhex-3-ene (E)-3,7-dimethylocta-4,6-dien-3-ol (E)-4,8-dimethyldeca-4,9-dienal (E)-4-methyldec-3-en-5-ol (l)-Citronellal (R)-()-Linalool (S)-(+)-Linalool (S)-(1R,5R)-4,6,6-trimethylbicyclo[3.1, 1]hept-3-en-2-one (Z)-1-((1R,2S)-2,6,6-trimethylcyclohex-3-en-1-yl)but-2-en-1-one (Z)-1-((2-methylallyl)oxy)hex-3-ene (Z)-3-dodecenal (Z)-3-hepten-1-yl acetate (Z)-3-hexen-1 yl-2 cyclopenten-1-one (Z)-5-methylheptan-3-one oxime (Z)-6-ethylideneoctahydro-2H-5,8-methanochrome (Z)-dodec-4-enal (Z)-hex-3-en-1-yl cyclopropanecarboxylate (Z)-hex-3-en-1-yl isobutyrate (Z)-hex-3-en-1-yl methyl carbonate (Z)-hex-3-en-1-yl isobutyrate 1-(3,3-dimethyleyclohexyl)ethyl formate 1,1,2,3,3-Pentamethylindan 1,1-dimethoxynon-2-yne, 1,2-dihydrolinalool 1,2-dimethyl-3-(prop-1-en-2-yl)cyclopentan-1-ol 1,3,3-trimethyl-2-norbornanyl acetate 1,3,5-undecatriene 1,4-cineole 1,8-thiocineol 1,1,5,5-tetramethylhexahydro-2,5H-spiro[[1,3]dioxolane-2,8-[2,4a]methanonaphthalene] K 10-undecenal 1-acetate 1-cyclohexylethyl-(E)-but-2-enoate 1-decanol 1-ethoxy-4-(tert-pentyl)cyclohexane 1-ethyl-3-methoxytricyclo[2,2.1.02,6]heptane 1-Ethyl-3-methoxytricyclo[2.2.1.02,6]heptane 1-hepten-1-ol, 1-limonene 1-methoxy-3a,4,5,6,7,7a-hexahydro-1H-4,7-methanoindene 1-oxaspiro(4,5)decan-2-one 1-Phenyl-2-pentanol 1-phenylethyl acetate 2-Heptyl tetrahydrofuran 2-isopropyl-4-methylthiazole 2-(1-ethoxyethoxy)ethyl)benzene 2-(2,2,3-trimethyleyclopent-3-en-1-yl)acetonitrile: 2-(6.6-dimethylbicyclo[3.1.1]hept-2-en-2-yl)acetaldehyde 2-(heptan-3-yl)-1,3-dioxolane 2-(l-ethoxyethoxy)ethyl)benzene 2-(sec-butyl)cyclohexan-1-one 2-(tert-butyl)cyclohexan-1-ol 2-(tert-butyl)cyclohexyl ethyl carbonate 2,2,5-trimetriyl-5-pentylcyclopentan-1-one 2,4-dimethyl-4-phenyltetrahydrofuran 2,4-Nonadienal 2,5-dimethyl-4-methoxy-3(2H)-ruranone 2,6,10,10-tetramethyl-1-oxaspiro[4,5]dec-6-ene 2,6,6-trimethylester 2,6,9,10-tetramethyl-1-oxaspiro(4.5)deca-3,6-diene 2,6-dimethyloct-7-en-4-one 2,6-dimethyl-octanal 2,6-nonadien-1-ol 2,6-nonadienal 2-butoxyethanol 2-butyl-4,4,6-trimethyl-1,3-dioxane 2-decenal 2-ethoxy-2,6,6-trimethyl-9-methylenebicyclo[3,3.1]nonane 2-heptyl tetrahydrofuran 2-heptylcyclopentan-1-one 2-hexen-1-ol 2-hexylcyclopent-2-en-1-one 2-hexylcyclopentan-1-one 2-hexylidene cyciopentanone 2-isopropoxyethylbenzene 2-isopropyl-1,7,7-trimethylspiro[bicyclo[2.2.1]heptane-2,4-[1,3]dioxane] 2-isopropyl-5-methyl-2-hexenal 2-isopropyl-N,2,3-trimethylbutyramide 2-mercapto-2-methylpentan-1-ol 2-methoxy-3-(1-methylpropyl)pyrazine 2-methoxynaphthalene 2-methyl-4-phenyl-1,3-dioxolane 2-methyldecanenitrile 2-metoxynaphthalene 2-nonanol 2-nonanone 2-nonanone propylene glycol acetal 2-nonen-1-al 2-pentylcyclopentan-1-ol 2-pentylcyclopentan-1-one 2-phenethyl propionate 2-phenoxyethanol 2-phenylethyl acetate 2-propylheptanenitrile 2-trans-6-trans-onadienal 2-undecenal 2-undecenenitrile 3-(3 isopropylphenyl)butanal 3-dimethyl-5(2,2,3-trimethyl-3-cyclopenten-lyl)-4-penten-2-ol 3-(2-ethylphenyl)-2,2-dimethylpropanal 3-(3-isopropylphenyl)butanal 3-(4-methoxyphenyl)-2-methylpropanal 3-(4-methylcyclohex-3-en-1-yl)butanal 3-(p-Isopropylphenyl)propionaldehyde 3,3-dimethyl-3-5(2,2,3-Trimethyl-3-Cyclopentenyl)-4-penten-2-ol 3,6-nonadien-1-ol 3,6-dimethyl-3-oetanyi acetate 3,7-dimethyl-1-octanol 3,7-dimethyl-2-methylene-6-octenal 3a,4,5,6,7,7a-hexahydro-1H-4,7-methanoinden-6-yl acetate 3-cyclohexene-1-carboxylic acid 3-hexenol 3-hexenyl isovalerate 3-hydroxybutan-2-one 3-methoxy-3-methyl butanol 3-methoxy-7,7-dimethyl-10-methylenebicyclo[4.3.1]decane 3-methyl-1,2-cyclopentanedione 3-methylphenethyl alcohol 3-nonylacrolein 4-(2-methoxypropan-2-yl)-3-methylcyclohex-1-ene 4-(tert-butyl)cyclohexyl acetate 4-(tert-pentyl)cyclohexan-1-one 4,5,6,7-tetrahydro-3,6-dimethylbenzofuran 4-carvomenthenol 4-cyclohexyl-2-methylbutan-2-ol 4-ethylguaiacol 4-methyl-2-phenyl-3,6-dihydro-2H-pyran 4-methyl-2-phenyltetrahydro-2H-pyran 4-methylquinoline 4-pentenophenone 4-terpinenol 4-tetraethyl-2-phenyl-3,6-dihydro-2H-pyran 4-vinylphenol 5-isopropenyl-2-methyl-2-vinyltetrahydrofuran 5-ethyl-4-hydroxy-2-methylfuran-3(2H)-one 5-methyl-3-heptanone 6,6dimethyl-2-norpmene-2-propionaidehyde 6,6-dimethoxy-2,5,5-trimethylhex-2-ene 6,6-dimethyl-2-methylenebicyclo [3.1.1]heptan-3-ol 6,6-dimethyl-2-norpinene-2-propionaldehyde 6,8-diethyl-2-nonanol 6-Isopropylquinoline 6-methylquinoline 7-epi-alpha-Selinene 7-epi-sesquithujene 7-isopropyl-8,8-dimethyl-6,10-dioxaspiro[4.5]decane 9-decenal Acetaldehyde benzyl 2-methoxyethyl acetal Acetaldehyde dipropyl acetal Acetaldehyde phenylethyl propyl acetal Acetate C9 Acetoanisole Aldehyde C-11 Alloaromadendrene Allyl 2-(isopentyloxy)acetate Allyl heptanoate Allyl phenethyl ether Allyl-2-(isopentyloxy)acetate alpha-Thujone alpha-4-dimethyl benzenepropanal alpha-Acetoxystyrene alpha-Amorphene alpha-Bergamotene alpha-Cadinene alpha-Cedrene epoxide alpha-Cubebene alpha-Fenchene alpha-Gurjunene alpha-Limonene alpha-methyl cinnamaldehyde alpha-Methyl-cyclohexanepropanol alpha-Muurolene alpha-Patchouiene alpha-Santalene alpha-Selinene alpha-Terpinyl acetate alpha-Terpinyl propionate alpha-Thujone Anethole Anisyl acetate Anisyl formate Benzyl alcohol Benzyl butyrate Benzyl dimethyl carbinol Benzyl isobutyrate Benzyl isovalerate Benzyl tert-butanol Benzylacetone beta-Caryophyllene beta-Cedrene beta-Copaene beta-Farnesene beta-Patchoulline beta-Phellandrene beta-Pinene beta-Pinene epoxide beta-Selinene beta-Sesquiphellandrene beta-Terpineol beta-Terpinyl acetate Bigarade oxide Borneol Bornyl acetate Bornyl isobutyrate Camphene Camphor Camphorquinone Capraldehyde Caproyl alcohol Caprylic acid Caprylic alcohol Caprylnitrile Carbitol Carvacrol Carvone Cedryl methyl ether Chloroxylenol Cinnamic alcohol Cinnamic aldehyde Cinnamyl formate Cinnamyl nitrile cis-2-hexenol cis-3,cis-6-nonadienol cis-3-hexen-1-ol cis-3-Hexenyl 2-methylbutyrate cis-3-hexenyl butyrate cis-3-hexenyl propionate cis-3-hexenyl tiglate cis-3-hexenyl valerate cis-3-hexenyl-cis-3-hexenoate cis-4-(tert-butyl)cyclohexyl acetate cis-4-decen-1-al cis-6-nonenol cis-Carveol cis-Limonene oxide cis-Ocimene cis-Pinane Citral Citral dimethyl acetal Citral propylene glycol acetal Citronellal Citronellyl formate Citronellyl nitrile Cosmene Creosol Cumic alcohol Cyclohexylethyl acetate Decahydro-3H-spiro[furan-2,5-[4,7]methanoindene] Decahydro-beta-naphthol Decanal diethyl acetal Decyl propionate delta-3-Carene delta-Elemente Dibutyl sulfide Dihydro linalool Dihydro-alpha-ionone Dihydro-alpha-terpinyl acetate Dihydrocarveol Dihydrocarveol Dihydrocarveol acetate Dihydrocarvone Dihydroisophorone Dihydrojasmone Dihydromyrcenol Diphenylmethane Diphenyloxide d-Limonene Dodecanal dimethyl acetal d-p-8(9)-Menthen-2-one Ethyl (1R, 6S)-2,2,6-trimethylcyclohexane-1-carboxylate Ethyl (3aR,4S,7R,7aR)-octahydro-3aH-4,7-methanoindene-3a-carboxylate Ethyl 2-(cyclohexyl)propionate Ethyl 2-ethyl-6,6-dimethylcyclohex-2-ene-1-carboxylate Ethyl decanoate Ethyl gamma-safranate Ethyl hexyl ketone Ethyl nonanoate Ethyl octanoate Ethyl-(1R,2R,3R,4R)-3-isopropylbicyclo[2.2.1]hept-5-ene-2-carboxylate Eucalyptol Eugenol Fenchyl alcohol Furforyl hexanoate gamma-Cadinene gamma-Himachalene gamma-Muurolene gamma-Terpeninyl acetate gamma-Terpinene gamma-Terpineol Geranial Geranyl formate Geranyl nitrile Gyrane Heliotropin Heptaldehyde Heptyl acetate Heptyl alcohol Hexenyl tiglate Hexyl 2-methylbutanoate Hexyl butyrate Hexyl hexanoate Hexyl propanoate Hexyl tiglate Hydratopic alcohol Hydratropaldehyde dimethyl acetal Hydrocinnamyl alcohol Hydrotropaldehyde dimethyl acetal i-(3,3-dimethylcyclohexyl)ethyl acetate Irisnitrile Isoamyl isobutyrate Isoamyl octanoate Isoborneol Isobornyl propionate Isobornyl acetate Isobornyl isobutyrate Isocyclocitral Isomenthone Isononanol Isononyl acetate Isopentyrate Isopropyl 2-methylbiityrate Isopropylvinylcarbinol Isopulegol L-Carvone Lauraldehyde Leaf acetal Linalool Linalool oxide (furanoid) Linalyl acetate Linalyl formate Linalyl isobutyrate Linalyl propionate Maceal Menthone Methoxycitronellal Methoxycyclododecane Methoxymelonat Methyl (1s,4s)-1,4-dimethylcyclohexane-1-carboxylate Methyl (E)-non-2-enoate Methyl (E)-octa-4,7-dienoate Methyl 2-methylbutyrate Methyl 2-octynoate Methyl alpha-cyclogeranate Methyl chavicol Methyl cinnamate Methyl cyclopentylideneacetate Methyl diphenyl ether Methyl eugenol Methyl geraniate Methyl isoeugenol Methyl isoeugenol Methyl nonyl acetaldehyde Methyl nonyl acetaldehyde dimethyl acetal Methyl nonyl ketone Methyl octine carbonate Methyl octyl acetaldehyde Methyl phenyl carbinyl propionate Methyl phenylacetate Methyl phenylethyl carbinol Methyl-2,2-dimethyl-6-methylenecyclohexane-1-carboxylate Methyl-2-methylbutyrate Myrcene Myrcenol Myrcenyl acetate Myroxide Myrtenal Nerol Neryl Formate n-Hexyl-2-butenoate Nonaldehyde Nonyl alcohol O-Methyl linalool Ocimenol Octahydro-1H-4,7-methanoinden-5-yl acetate Octahydro-1H-4,7-methanoindene-1-carbaldehyde Octanal Octanal dimethyl acetal Octanal propylene glycol acetal Octyl acetate para-Cymen-8-ol p-cresyl isobutyrate p-Cymene Perillaldehyde Perillyl acetate Phenethyl alcohol Phenethyl formate Phenylacetaldehyde ethyleneglycol acetal p-lsopropylphenylacetaldehyde p-Menth-3-en-1-ol p-Propyl anisole Propyl (S)-2-(tert-pentyloxy)propanoate Propylene glycol p-t-butyl phenyl acetaldehyde p-tert-Amyl cyclohexanol Racemic alpha-Pinene Rhodinol Sabinene Sabinene hydrate Sabinol Safrole Selina-3,7(11)-diene Spirodecane Tetrahydrogeranial Tetrahydrojasmone Tetrahydrolinalool Tetrahydrolmalyl acetate Thujopsene Thymol Thymol methyl ether trans,trans-2,4-nonadienal trans-2,cis-6-nonadienal trans-2-decenal trans-2-hexenol trans-2-nonen-1-al trans-2-tert-butylcyclohexanol trans-3, cis-6-nonadienol trans-4-Decen-1-al trans-Anethole trans-beta-ocimene trans-beta-ociraene trans-Dihydrocarvone trans-Geraniol Undecanal Valencene

6. The mixture of claim 1, wherein the components (a) and (c) are present in a ratio by weight of from about 90:10 to about 99.99:0.01 and wherein component (b) is present in an amount of from about 10 ppm to about 60.000 ppm (0.001- to 6 wt.-percent)

7. The mixture of claim 1, wherein component (b) is present in an amount of from about 50 ppm to about 20.000 ppm (0.005 to 2 wt.-percent).

8. The mixture of claim 1, wherein component (b) is present in an amount of from about 100 ppm to about 10.000 ppm (0.01 to 1 wt.-percent).

9. The mixture of claim 1, further comprising a liquid carrier.

10. The mixture of claim 9, wherein said liquid carrier is selected from the group consisting of water, C.sub.1-C.sub.4 aliphatic alcohols, and polyols having 2 to 12 carbon atoms and 1 to 5 hydroxyl groups.

11. A consumer product comprising the mixture of claim 1.

12. The product of claim 11, comprised of a cosmetic composition, a pharmaceutical composition, an oral composition, a detergent composition or a food composition.

13. The product of claim 11, comprising said mixture in an amount of from about 0.0001 to about 10 wt.-percentcalculated on the composition.

14. The product of claim 11, comprising said mixture in an amount of from about 0.005 to about 5 wt.-percentcalculated on the composition.

15. The product of claim 11, comprising said mixture in an amount of from about 0.01 to about 3 wt.-percentcalculated on the composition.

16. A method for masking the unpleasant odour of 1,2-alkanediols or products comprising said 1,2-alkanediols comprising or consisting of the following steps: (a) providing a source of at least one 1,2-alkanediol with an unpleasant odour or a product comprising said at least one 1,2-alkanediol with an unpleasant odour; and (b) adding at least one malodor reduction material having a Malodor Reduction Value (MORV) of at least 0.5 according to claim 1.

17. The use of at least one malodor reduction material having a Malodor Reduction Value (MORV) of at least 0.5 according to claim 1 for masking the unpleasant odour of 1,2-alkanediols or products comprising them.

Description

EXAMPLES

The MORV Concept

[1331] 1) Search Chemical Abstracts using the name and/or the CAS Registry number for the material of interest and use the structure provided. If there are multiple isomers for a given material, use the structure provided by Chemical Abstracts or use the isomer that is most prevalent in the material. Input structure of material into winMolconn (Hall Associates, version 1.1.2.1). [1332] 2) Input values from 1) above into the following four equations:

MORV=8.5096+2.8597(dxp9)+U253(knotpv)0.34484(elC202)0.00046231(iclw)+3.3509(idcbar)+0.11158(n2pag22)a)

MORV=5.2917+2.1741(dxvp5)2.6595(dxvp8)+0.45297(el C2C2d}0,6202(clC202)+1.3542(CdCH2)+0.68105(CaasC)+1.7129(idcbar)b}

MORV=0.0035+0.8028(SHCsatu)+2,1673(xvp7)1.3507(clCIC3d)+0.61496(clClO2)+0.00403(idc)0.23286(nd2).c)

MORV=0.99260.03882(SdO)+0.1869(Ssp3OH)+2.1847(xp7)+0.34344(e C302)0.45767(cIC2C3)+0.7684(CKetone)d) [1333] Equation a) is for the malodor trans-3-methyl-2-hexenoic acid (carboxylic acid based malodors) [1334] Equation b) is for the malodor trimethylamine (amine based malodors) [1335] Equation c) is for the malodor 3-mercapto-3-methylhexan-1-ol (thiol based malodors) [1336] Equation d) is for the malodor skatole (indole based malodors) [1337] 3) For purpose of the present application, a material's MORV is the highest MORV value from equations 2a) through 2d). [1338] 4) If all MORV values from equations 2a) through 2d) above are greater than 0.5, the subject material has a so-called Universal MORV.

Examples 1 to 10, Comparative Examples C1 to C4

[1339] Various malodour compositions were prepared from individual malodor reduction agents all showing a MORV value of at least 1.0; the compositions are described in Table 1. Subsequently these compositions were added to various 1,2-alkanediols in amounts ranging from 1 to 10 wt.-percent and the odor was evaluated by a panel of experienced examiners according to the following scale: (5) serious rancid odor to (1) odorless. The results are presented in Table 2 and represent mean scores.

TABLE-US-00001 TABLE 1 Malodor reduction compositions for 1,2-alkanediols Malodor Reducing Agent M1 M2 M3 M4 M5 M6 (E)-3,7-dimethyl-2,6- 20 octadienylhexadecanoate 2,3-Dihydro-5,6-dimethoxy-2- 20 20 (4-piperidinylmethylene)-1H- inden-1-one 3-methyl cyclopentadecenone 20 20 20 4-tert-butylcyclohexanol 20 20 5-Cyclohexadecen-1-one 20 20 20 Cedryl methyl ether 20 20 Decyl aldehyde 20 20 Diphenyl oxide 20 Isononylacetate 20 20 Lauric Aaldehyde 20 20 Methanoinden-1-yl propanoate 20 20 20 Methyl hexadecanoate 20 Methyl isoeugenol 20 20 Trans-4-decenal 20 20 Undecyl aldehyde 20 20

TABLE-US-00002 TABLE 2 1,2-alkanediol compositions Blend C1 C2 C3 C4 1 2 3 4 5 6 7 8 9 10 1,2- 100 95 95 90 pentane- diol 1,2- 100 95 90 hexane- diol 1,2- 100 95 90 octane- diol 1,2- 100 95 90 decane- diol M1 5 10 90 M2 5 10 M3 5 10 M4 5 10 M5 5 M6 10 Olfactory evaluation After 4 4 3 3 3 1 1 1 2 1 2 1 1 1 1 hours

[1340] The examples and comparative examples clearly indicate that adding 10 to 20 wt.-percent of one of the malodor reduction compositions to any of the 1,2-alkanediols removes the rancid odor completely.

[1341] It should be noted that the maolodor reduction agents and the compositions comprising them are particularly preferred.