# Blue Cypress essential oil

> A woody, blue-tinted single oil distilled from Australian cypress wood, popular for skin, hair, and outdoor-activity routines.

Canonical page: https://essential-oils.club/oils/single/blue-cypress

Type: Single oil

## At a glance

- **Botanical name:** Callitris intratropica
- **Plant part:** Wood
- **Extraction:** Steam-distilled
- **Aroma:** Warm, woody, sweet
- **Origin:** Northern Territory, Australia
- **Blends with:** Citrus, cedarwood, sandalwood, lavender

## Composition

- Guaiol: 15%
- β-Eudesmol: 8%
- Bulnesene: 8%
- Dihydrocolumellarin: 6%
- Selinene: 5%
- Guaiazulene: 4%

Source: JEOR study on azulenes, costols and γ-lactones from cypress-pines (2001) (https://doi.org/10.1080/10412905.2001.9699594)

## Key constituents

- **Guaiol** (20-30%) — Woody sesquiterpene alcohol that forms much of the oil's base character
- **Guaiazulene** — Naturally occurring compound responsible for the oil's distinctive blue tint

## How to use it

- **In the diffuser:** 3–5 drops alone, or with citrus oils for an outdoor-inspired blend that travels well.
- **On skin:** Dilute in a carrier oil — a long-standing favorite for moisturizing dry skin and scalp.

## Safety

- For topical use, dilute in a carrier oil and keep out of reach of children.
- Maximum dermal use: Dilute in a carrier oil for skin.
- A gentle, viscous wood oil; dilute before topical use as usual.
- Its blue guaiazulene can stain fabrics and light surfaces.
- Not phototoxic. Keep out of reach of children.

## What the research says

- Blue cypress oil has been studied for uses including insect repellency, and its sesquiterpenes for various activities in the laboratory. These are preliminary findings, not clinical health claims. — JEOR study (2001) (https://doi.org/10.1080/10412905.2001.9699594)

## Evidence

- Blue cypress is a guaiol- and guaiazulene-rich sesquiterpene wood oil, its blue colour coming from the azulene fraction. — JEOR study (2001) (https://doi.org/10.1080/10412905.2001.9699594)

## Frequently asked questions

### Why is blue cypress blue?

Its colour comes from guaiazulene, an azulene sesquiterpene formed from precursors in the wood during distillation — a different blue compound from the chamazulene in blue tansy and German chamomile.

### What does blue cypress smell like?

Soft, sweet, and woody with a faint smoky-resinous depth from its sesquiterpene alcohols — warmer and rounder than the fresh, sharp Mediterranean cypress.

### Is blue cypress phototoxic?

No — it's a distilled wood oil and isn't phototoxic. It can stain, though, so dilute and handle it with care.

_Educational reference only — not medical advice. Essential oils are not intended to diagnose, treat, cure or prevent any disease._