RUŌOD Lab

Bitter Orange Oil (Expressed)

Essential oil · Citrus / Aromatic

citrus, bitter, dry, orange peel — top note.

Aroma illustration for Bitter Orange Oil (Expressed): a halved orange, for its orange and orange peel notes. It illustrates smell associations, not the material or its source.Illustration of a halved bitter (Seville) orange with a textured rind, a white orange blossom and leaves.
Aroma View: an illustration of what Bitter Orange Oil (Expressed) smells like (orange, orange peel), drawn by RUŌOD Lab — not its appearance or its source.An original illustration of the botanical source by RUŌOD Lab — not a photograph of the material.
Images

By the RUŌOD Lab TeamRevision 1Updated

In short

Bitter orange oil is the cold-pressed peel oil of the bitter or Seville orange, the same tree that gives neroli from its flowers and petitgrain from its leaves. It is drier and more aromatic than sweet orange.

What Bitter Orange Oil (Expressed) smells like

Bitter orange (bigarade) peel oil is drier and more austere than sweet orange: recognisably orange, but with the sweetness pulled back, tart and tannic, with a fairly tenacious floral undertone. Arctander, quoted by a supplier, finds notes recalling bergamot, grapefruit and sweet orange in it, yet an odour distinctly different from other citrus oils; a perfumer adds a slight grapefruit note beneath the orange. A glossary notes a medicinal quality absent from sweet orange.

Leading note
Dry orange peel
Clear facets
Bitter, tannic
Supporting facets
Floral
Faint facets
Grapefruit-like, medicinal
Character
Dry, bitter, refined, fresh
  • citrus
  • bitter
  • dry
  • orange peel

What makes Bitter Orange Oil (Expressed) distinctive

Austerity. It is orange with the sugar removed and a floral heart added — the peel of the tree whose flowers give neroli and whose leaves give petitgrain.

How Bitter Orange Oil (Expressed) is used

Used for refined citrus top notes in colognes and chypres, where it gives a drier, more sophisticated orange than the sweet oil. Expressed oil is phototoxic.

Typical role: lift (adds diffusion and radiance, especially at the top).

How Bitter Orange Oil (Expressed) differs from similar materials

Sweet Orange Oil
A glossary describes sweet orange as juicy and bright where bigarade is tart and tannic.
Bergamot Oil (Expressed)
Arctander found notes recalling bergamot in bitter orange, but a distinct odour; bergamot is more floral and tea-like, bitter orange drier and more austere.
Petitgrain Bigarade Oil
Petitgrain comes from the same tree's leaves and twigs — green, woody and herbaceous; the peel oil is citrus, dry and bitter.

An asterisk marks a difference that a cited source states directly. The others compare the published descriptions of each material. Smell varies with grade, supplier and dilution; compare them side by side on blotters before substituting one for another.

Formulation considerations

Expressed bitter orange oil is phototoxic and restricted for skin products. It oxidises like other citrus oils.

Identity and classification

Type
Essential oil
Origin
Natural
Odour family
Citrus / Aromatic
Note position
Top note
Physical form at room temperature
Liquid
Also known as
Bitter orange peel oil
Botanical source
Citrus aurantium L.
CAS number
68916-04-1

The CAS number was checked on 19 October 2026 against a PubChem substance record that gives it for this material. A natural material is a mixture, so it has no single formula; its composition varies with origin and processing.

Safety and compliance

The IFRA Standards Library lists a Standard covering Bitter Orange Oil (Expressed):

  • "Bitter orange peel oil expressed" — Restriction, 49th Amendment, published 2020-01

Limits differ by product category and are set out in the Standard itself; this page does not reproduce them. The list above reflects the library as read on 19 October 2026.

This page is general information, not a safety assessment or a specification. Confirm identity, composition, IFRA status and allergen content from your supplier's documents for the lot you hold.

Materials it works with

Used in formulas and accords

Used in 29 published formulas

Bitter Orange Oil (Expressed) is an ingredient in 28 perfume formulas and 1 base in the Formula & Accord Library.

Community formulas

RUŌOD House Originals

Original compositions by RUŌOD House.

Further reading

Questions about Bitter Orange Oil (Expressed)

Is Bitter Orange Oil (Expressed) natural or synthetic?

Bitter Orange Oil (Expressed) is natural. It is a volatile oil obtained from plant material by steam distillation or, for citrus peels, by cold expression.

What is the CAS number of Bitter Orange Oil (Expressed)?

68916-04-1, the registry number for the essential oil as a substance rather than a single molecule. It was checked against PubChem on 19 October 2026.

Which published formulas use Bitter Orange Oil (Expressed)?

Bitter Orange Oil (Expressed) is used in 29 published formulas in the RUŌOD Lab Formula & Accord Library, including Apple Cellar, Beeswax Throne and Bitter Bridle. Each is listed with a link under "Used in formulas and accords" on this page.

Is Bitter Orange Oil (Expressed) covered by an IFRA Standard?

Yes. The IFRA Standards Library lists a Standard covering it: "Bitter orange peel oil expressed" — Restriction, 49th Amendment. The limits depend on the product category; read the Standard itself before formulating.

Sources

Your own records, next to the reference

Keep your own record of Bitter Orange Oil (Expressed) — supplier, cost, stock, dilutions and where it is used — in RUŌOD Lab's material library.

The material library All materials