When discussing either cannabis flowers or concentrates in detail, the subject of odor comes up, leading to a discussion of the entourage effect of Sweet Mary’s panoply of engaging smells, noted for their ability to freely penetrates double zip lock baggies and quickly permeate whole rooms or vehicles.

In Sweet Mary II we identified over 400 compounds adding to Sweet Mary’s entourage, but all odors aren’t created equal, so which ones are the loudest?

In a paper published by Rice and Koziel on characterizing the impact of the different volatile compounds in marijuana, they identified the dozen loudest from fresh material stuffed in a duffle bag?

Check out the engaging:  Characterizing the Smell of Marijuana by Odor Impact of Volatile Compounds, by Rice and Koziel @ PLOS.org.  


The following are the dozen most odiferous cannabis compounds, in order of human odor threshold pungency, as well as their physical properties.  Of note, is that the chemical composition is of greater impact than vapor pressure:

1.0       Nonanal

1.1  Physical Properties
Chemical formulaC9 H18 O
Molar mass142.24166000
Appearancecolorless to pale yellow clear liquid (est)
Density0.81900 to 0.82700 @  25.00 °C.
Melting Point-18C/-0.4F
Boiling point191.00 to  193.00 °C. @ 760.00 mm Hg
Flash point145.00 °F. TCC ( 63.00 °C. )
Vapor pressure0.532000 mm/Hg @ 25.00 °C. (est)
Solubility in water96 mg/L @ 25 °C (exp)
Odorwaxy aldehydic rose fresh orris orange peel fatty peely

2.0       Decanol,

1.1  Physical Properties
Chemical formulaC10 H22 O
Molar mass158.28454000
Appearancecolorless clear liquid (est)
Density0.82500 to 0.83100 @  25.00 °C.
Melting Point6.90 °C. @ 760.00 mm Hg
Boiling point231.10 °C. @ 760.00 mm Hg
Flash point180.00 °F. TCC ( 82.00 °C. )
Vapor pressure0.008510 mm/Hg @ 25.00 °C.
Solubility in water37 mg/L @ 25 °C (exp)
Odorfatty waxy floral orange sweet clean watery

3.0       o-Cymene

1.1  Physical Properties
Chemical formulaC10 H14
Molar mass134.22158000
Appearancecolorless to pale yellow clear liquid (est)
Density0.877 g/cm3 at 25 °C (77 °F)
Melting Point-71/-72C/-96/-98F
Boiling point177.00 to  179.00 °C. @ 760.00 mm Hg
Flash point123.00 °F. TCC ( 50.60 °C. ) (est)
Vapor pressure1.500000 mm/Hg @ 25.00 °C.
Solubility in water23.3 mg/L @ 25 °C (exp)

4.0       Isobutyraldehyde, aka 2-methyl-1-propanal

1.1  Physical Properties
Chemical formulaC4 H8 O
Molar mass72.10696000
AppearanceColorless clear liquid
Density0.78300 to 0.78800 @  25.00 °C.
Melting Point-65.00 °C. @ 760.00 mm Hg
Boiling point63.00 °C. @ 760.00 mm Hg
Flash point-18.89C/-2F
Vapor pressure173.00 mm/Hg @ 25.00 °C.
Solubility in water3.124e+004 mg/L @ 25 °C (est)
OdorFresh aldehydic floral green

5.0       1-Chloroacetophenone

1.1  Physical Properties
Chemical formulaC6H5COCH2Cl
Molar mass154.59 g/mol
AppearanceWhite crystaline solid
Density1.324 g/cmsolid
Melting Point58C/136.4F
Boiling point247C/476.6F
Flash point118C/244F
Vapor pressure0.0054 mm Hg at 68° F (NTP, 1992)
Solubility in waterless than 1 mg/mL at 66° F (NTP, 1992)
OdorChemical mace, apple blossoms when dilute

6.0       Nerol aka 2,6-octadien-1-ol, 3,7-dimethyl-(2z)

1.1  Physical Properties
Chemical formulaC10 H18 O
Molar mass154.25266000
AppearanceColorless clear liquid (est)
Density0.87500 to 0.88300 @  25.00 °C.
Melting Point-15C/5F
Boiling point225.00 to  227.00 °C. @ 760.00 mm Hg
Flash point226.00 °F. TCC ( 107.78 °C. )
Vapor pressure0.013000 mm/Hg @ 25.00 °C. (est)
Solubility in water255.8 mg/L @ 25 °C (est)
Odorsweet natural neroli citrus magnolia

7.0       Propylamine

1.1  Physical Properties
Chemical formulaC3 H9 N
Molar mass59.11173000
AppearanceColorless to yellow clear liquid (est)
Density0.71400 to 0.72000 @  25.00 °C.
Melting Point-83C/-117F
Boiling point47.00 to  48.00 °C. @ 760.00 mm Hg
Flash point-22.00 °F. TCC ( -30.00 °C. )
Vapor pressure328.757996 mm/Hg @ 25.00 °C. (est)
Solubility in water1000000 mg/L @ 20 °C (exp)

8.0       o-Guaiacol

1.1  Physical Properties
Chemical formulaC7 H8 O2
Molar mass124.13916000
AppearanceColorless to pale yellow clear oily liquid to solid (est)
Density1.12300 to 1.13000 @  25.00 °C.
Melting Point28.00 to  32.00 °C. @ 760.00 mm Hg
Boiling point205.00 to  206.00 °C. @ 760.00 mm Hg
Flash point180.00 °F. TCC ( 82.22 °C. )
Vapor pressure0.179000 mm/Hg @ 25.00 °C. (est)
Solubility in water7226 mg/L @ 25 °C (est)
OdorPhenolic smoke spice vanilla woody

9.0       Linalyl acetate aka 1,6-octadien-3-ol, 3,7-dimethyl-, acetate

1.1  Physical Properties
Chemical formulaC12 H20 O2
Molar mass196.28980000
AppearanceColorless clear liquid (est)
Density0.90300 to 0.91200 @  25.00 °C.
Melting Point85 °C (185 °F; 358 K)
Boiling point220.00 °C. @ 760.00 mm Hg
Flash point185.00 °F. TCC ( 85.00 °C. )
Vapor pressure0.116000 mm/Hg @ 25.00 °C. (est)
Solubility in water20.12 mg/L @ 25 °C (est)
OdorSweet green citrus bergamot lavender woody

10.0     Methyl anthranilate

1.1  Physical Properties
Chemical formulaC8 H9 N O2
Molar mass151.16513000
AppearancePale yellow to dark yellow clear liquid to solid (est)
Density1.16100 to 1.16900 @  25.00 °C.
Melting Point23.00 to  24.50 °C. @ 760.00 mm Hg
Boiling point238.00 to  241.00 °C. @ 760.00 mm Hg
Flash point220.00 °F. TCC ( 104.44 °C. )
Vapor pressure0.016000 mm/Hg @ 25.00 °C. (est)
Solubility in water2,850 mg/liter @ 25 deg C
OdorFruity grape orange flower neroli

11.0     Benzaldehyde

1.1  Physical Properties
Chemical formulaC7 H6 O
Molar mass106.12402000
AppearanceColorless to pale yellow clear liquid (est)
Density1.04100 to 1.04600 @  25.00 °C.
Melting Point-26.00 to  -25.00 °C. @ 760.00 mm Hg
Boiling point178.00 to  179.00 °C. @ 760.00 mm Hg
Flash point145.00 °F. TCC ( 62.78 °C. )
Vapor pressure1.270000 mm/Hg @ 25.00 °C.
Solubility in water0.3 g/100 mL (20 °C)
Odorstrong sharp sweet bitter almond cherry

12.0     Limonene

1.1  Physical Properties
Chemical formulaC10H16
Molar mass136.23 g/mole
AppearanceColorless to pale yellow
Melting Point-40°C (-40°F)
Boiling point176.00/178 °C. @ 760.00 mm Hg
Flash point43.33 °C/110.00 °F
Vapor pressure1.550000 mm/Hg @ 25.00 °C.
Solubility in water4.581 mg/L @ 25 °C (est)
OdorCitrus herbal terpene camphor

Leave a Reply