DILUTION CHART 2020 Compiled by: Christine Courtney Principal OBUS School of Healing Therapies

References Essential oils Safety, By Tisserand and Young, Tisserand Institute: Essential oils Safety Master Class Course Notes Complete Guide to Aromatherapy Salvatore Battaglia Aromatica, A Clinical Guide to Essential oil Therapeutic by Peter Holmes Key NP = do not use at all in pregnancy

X = skin irritating - dose dependent

Number = Maximum safe dilution as a % x** = Possible drug interaction

E* = not to be used in pregnancy, breastfeeding, endometriosis and oestrogen dependant cancers

P** Can be lethal if ingested OBUS Dilution Chart 2020 0-3 4 to 24 2 to 6 6 to 15 15+ skin photo photo Pregnancy Cancer Anti months months years years years irritating toxic allergenic coagulation 0.2%- ANGELICA ROOT Angelica archangelica 0.2 0.4 0.8 0.8 0.8% 0.8 ANISEED, Pimpinella anisum x x 0.5 2.4 NP E* ANISE (star), Anise, Anisum vulgare X X 0.5 1.75 NP E* ANISEED MYRTLE, Syzygium anisatum x 0.25 0.5 1 xx 0.5 BAY, Laurus nobilis x X 0.25 1 x 0.5 BASIL SWEET, Ocimum basilicum ct linalool 0.25 1 2 3 x 1 HOLY BASIL, Ocimum sanctum ct eugenol 0.1 0.5 1 1 x 1 EXOCTIC BASIL, Ocimum basilicum ct estragole x x x 0.1 x NP BENZOIN, Styrax benzoin 0.1%- BERGAMOT, Citrus bergamia 0.1 0.2 0.4 0.4 0.4% 0.4 X** BLUE CYPRESS, Callitris intratropica NP X** BLUE TANSY, Tanacetum vulgare x x 0.1 0.5 NP X** CAJUPUT ,Melaleuca leucadendron 0.5 1 2 5 2 CAMPHOR, (WHITE) Cinnamomum camphora ct camphor P** CARDAMON Elettaria cardamomum 0.5 1 2 5 2 CARAWAY,Carum carvi CARROT SEED, Daucus carota X 0.5 3 5 X CEDARWOOD, Cedrus atlantica CHAMOMILE GERMAN, Chamomilla recutita x** MOROCCAN CHAMOMILE Ormenis mixta CHAMOMILE ROMAN, Chamaemelum nobile x** CASSIS, Cinnamomum cassia x x 0.05 0.05 xxxx x CINNAMON BARK, Cinnamonum zeylanicum x x x 0.05 0.1 xxxx x x CINNAMON LEAF, Cinnamonum zeylanicum 0.1 0.3 0.6 0.6 X 0.1 CITRONELLA, Cymbopogon nardus 0.5 2 3 5 x 2 CLARY SAGE, Salvia sclarea CLOVE BUD,Syzygium aromaticum x 0.1 0.25 0.5 x 0.5 CAMPHOR - white COPAIBIA, Copaifera officinalis CORIANDER, Coriandrum sativum CORNMINT, Menta piperiat arvensis x x 0.5 2 5 2 CYPRESS,Cupressus sempervirens EUCALYPTUS, Eucalyptus citriodora 0-3 4 to 24 2 to 6 6 to 15 15+ skin photo photo Pregnancy Cancer Anti months months years years years irritating toxic allergenic coagulation EUCALYPTUS, Eucalyptus smithii 0.5 1 2 5 2 EUCALYPTUS, Eucalyptus Radiata x 0.5 1 2 5 2 EUCALYPTUS, Euc staigerianna (Australian Lemon balm) 0.25 1 2 3.4 x 2 X** FRAGONIA, Agonis fragrans 0.5 1 2 5 2 FENNEL SWEET, Foeniculum vulgare organic X X 1 2.5 NP E* FRANKINCENSE, Boswellia carteri GERANIUM, Pelargonium graveolens GINGER, Zingiber officinale 0.5%- GRAPEFRUIT, Citrus paradisi 0.5 2 3 4 2% 2 HELICHRYSUM, Helichrysum Italicum HO WOOD, Cinnamomum camphora var linaloolifera HYSSOP, Hyssopus officinalis var decumbens X X 0.1 0.3 NP JASMINE ABSOLUTE,Jasminum officinale x 0.25 0.5 0.7 x 0.7 JUNIPER BERRY, Juniperus communis KUNEA, Kunzea ericoides LAVENDER, Lavandula angustifolia LAVENDER, Lavandula latifolia spike x 0.5 1 2 5 2 Lavender Stoechas x x 2 5 NP X** 0.5%- LEMON, Citrus limonum 0.5 1 2 2 2% 2 LEMONGRASS, Cymbopogon citratus x 0.25 0.5 0.7 x 0.7 X** LEMON MYRTLE, Backhousia citriodora x 0.25 0.5 0.7 X 0.7 LIME, Citrus aurantifolia distilled 0.25%- LIME, Citrus aurantifolia expressed 0.25 0.5 0.7 0.7 0.7% 0.7 X** MANDARIN, Citrus reticulata MARJORAM SWEET, Origanum marjorana MAY CHANG, Litsea cubeba x 0.25 0.5 0.8 x 0.8 X** MELISSA, Melissa officinalis x 0.5 0.9 0.9 x 0.9 X** MYRRH, Commiphora myrrha x 1 3 5 NP NEROLI, Citrus aurantium var amara flos NIAOULI, Melaleuca viridiflora x 0.5 1 2 5 2 NUTMEG, Myristica fragrans x x 0.2 0.8 0.2 0.25%- ORANGE BITTER, Citrus aurantium var amara fruct 0.25 0.5 1.25 1.25 1.25% 1.25 0-3 4 to 24 2 to 6 6 to 15 15+ skin photo photo Pregnancy Cancer Anti months months years years years irritating toxic allergenic coagulation OREGANO, Origanum vulgare 0.1 0.25 0.5 1 xx NP PALMAROSA, Cymbopogon martinii X** PATCHOULI, Pogostemon cablin PALO SANTO, Bursera graveolens x x 1 3 2 PENNYROYAL, Menthka pelegium x x 0.25 1.3 X NP x** PEPPER BLACK, Piper nigrum PEPPERMINT, Mentha x piperita x x 0.5 2 5 2 PETITGRAIN, Citrus aurantium var amara fol PINE, Pinus sylvertris RAVENSARA, Ravensara aromatica x 0.25 0.5 1 NP RAVINTSARA Cinnamonum camphora ct cineole ROCK ROSE, Cistus ladaniferus ROSE ABSOLUTE, Rosa damascena 0.25 1 2 2.5 1 ROSE OTTO, Rosa centrifolia 0.1 0.3 0.5 0.6 0.3 ROSEMARY, Rosmarinus officinalis ct camphor ROSEMARY, Rosmarinus officinalis ct cineole wild x 0.5 1 2 5 2 SAGE, Savlia officinalis (Dalmatian) x x 0.1 0.4 NP 0.25%- SANDALWOOD, Santalum album 0.25 1 2 2 2% X 2 SPEARMINT, Mentha spicata 0.25 1 1.5 1.7 x 1.7 SPIKENARD Nardostachys jatamansi SPRUCE BLACK, Picea Mariana TAGETES, Tagetes glandulifera x x 0.01 0.01 0.01 0.01 TEA TREE, Melaleuca alternifolia 0.25 0.5 2.5 5 x 2 THUJA, CEDAR LEAF, WHITE CEDAR, Thuja occidentialis x x 0.1 0.4 NP THYME RED, Thymus vulgaris ct thymol x 0.25 0.5 1.3 x 1.3 THYME SWEET, Thymus vulgaris ct linalool VETIVER, Vetiveria zizanioides WINTER GREEN Gaultheria procumbens x x x 2.4 NP xxxx YARROW, Achillea millefolium x** YLANG YLANG, Cananga odorata x 0.2 0.4 0.8 x 0.8