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Standards
The chemical composition of tea tree oil is determined by ISO4730 and
AS 2782-1997 Australian Standard [Oil of Melaleuca, terpinen-4-ol type].
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Specification
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Appearance:(visual)
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:Clear mobile liquid
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Colour: (visual)
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:Colourless
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Odour: (Olfactory)
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:Characteristic
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Relative Density @ 20/20oC: (ISO 279)
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:0.885 - 0.906
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Moisture Content: (visual)
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:No visible water at 20ºC
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Refractive Index @ 20ºC:(ISO 280)
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:1.4750 - 1.4820
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Optical Rotation @ 20ºC:(ISO 592)
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:+5º to +15º
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Miscibility with 85% (v/v) ethanol @ 20oC:(ISO 875)
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:Clear solution with 1 vol. oil and 2 vols. 85% ethanol
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Components
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Minimum-maximum%
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Terpinen-4-ol
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>30
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 – Pinene
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1–6
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Sabinene
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Traces–3.5
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– Terpinene
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5–13
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Limonene
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0.5–4
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 – Cymene
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0.5–12
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1,8 Cineole
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<15
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 – Terpinene
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10–28
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– Terpinolene
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1.5–5
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– Terpineol
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1.5–8
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Aromadendrene
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Traces–7
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 – Cadinene
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Traces–8
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Globulol
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Traces–3
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Viridiflorol
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Traces-3
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