Apparatus and compositions for improving scent delivery

A volatile composition comprising:

• (i) greater than 30% of a scented hydrophobic material by weight of the volatile composition, wherein the scented hydrophobic material comprises one or more volatile compounds;
• and
• (ii) greater than 20% of a regulating scent intensity (RIS) composition by weight of the volatile composition, wherein the RIS composition comprises at least two of:
• a first regulating scent intensity component (RIS component) having a high average vapor pressure (VP) selected from the group consisting of:
• 3-methoxy-3-methylbutan-1-ol (MMB), 3-methylbutan-2-ol, butan-1-ol, 2,3-dimethylbutan-2-ol, 1-methoxypropan-2-ol, 2-methylbutan-2-ol, 3-methylbutan-1-ol, hex-1-en-3-ol, 2-ethylbutan-1-ol, 4-methylpentan-1-ol, 3-methylpentan-1-ol, ethyl 2-hydroxypropanoate, 2-butoxyethanol, ethyl 3-hydroxybutanoate, and mixtures thereof;
• a second RIS component having a medium average VP is selected from the group consisting of:
• dimethyl hexanedioate (DMA), ethyl 3,5,5-trimethylhexanoate, dimethyl butanedioate, diethyl propanedioate, ethyl 3-acetyloxyhexanoate, 5-methyl acetyloxyhexanoate, 3-O-butyl 1-O-ethyl propanedioate, dipropan-2-yl hexanedioate, (4-methoxyphenyl)methyl formate, ethyl 3-hydroxyhexanoate, and mixtures thereof;
• and
• a third RIS component having a low average VP is selected from the group consisting of:
• 1-(3-methoxypropoxy)propan-1-ol (DPM), 2-(2-Methoxyethoxy)ethanol, methyl 2-hydroxybenzoate, 6,8-dimethylnonan-2-ol, 2-phenoxyethanol, 4-Oxa-1,6-hexandiol, 1-(1-methyl-2-propoxyethoxy)propan-2-ol, 1-(2-butoxy-1-methoxy)propan-2-ol, and mixtures thereof,
• wherein the RIS composition comprises the second RIS component;
• wherein the average VP of each of said one or more volatile compounds is lower than at least one of the high, medium and low average VPs of the first, second and third RIS components at the same temperature.