Coriander CO2 is another aromatic available on the market today, which is why I thought I would compare it with the essential oil we know and use.

Common to both

Name: Coriander (Coriandrum sativum)

Family:   Apiaceae (Umbelliferae)

Description:  Coriander is an aromatic annual herb with delicate bright-green leaves, umbels of small white flowers and bunches of small round fruits, green at first, turning brown as they ripen. Coriander is native to the Mediterranean and western Asia but now cultivated commercially throughout the world.

History/Folklore: Because the aroma of the fresh leaves resembles the smell of a bed bug, the ‘coriandrum’ is derived from the Latin ‘koros’ which means ‘bed-bug’.

Coriander is one of the world’s oldest flavorings, the Egyptians called it the ‘spice of happiness’ and used it as an aphrodisiac.  They also presented coriander seeds as funeral offerings to deceased Pharaohs.  The seeds were found in Tutankhamen’s tomb.

Cardamom oil is used as a flavoring agent in pharmaceutical preparations (laxative and to prevent griping).  It is also used in soaps, creams, lotions and perfume as a fragrance component.  Widely used as a garnish in cooking and as a flavor ingredient in many types of food products.

Differences 

Method of Extraction 

Coriander CO2 :  Carbon dioxide as the `solvent` to extract the viscous liquid from dried seeds, yields around 75 – 97% essential oil)
Essential Oil:  Steam distilled (or hydro distilled)  from the crushed seeds.

Colour and Appearance

CO2: Colourless and transparent fluid (Kerkhof)
Essential Oil:
Almost colourless to pale yellow liquid.  (Burfield)

Aroma 

CO2:  Linalolic-spicy peppery odour character. (Burfield)
Essential Oil:
 Warm, spicy and somewhat peppery aroma, with a fresh slightly fruity and aldehydic orange twist.  (Burfield)

Chemistry 

Coriander CO2:  Alcohol: up to 80% linalool; Monoterpenes: a-pinene up to 15%, y-terpinene up to 10%; geranyl acetate, camphor around 4% and some geraniol and limonene. (Kerkhof)
Essential Oil:
  Alcohols: linalool 59 – 87.5%; Monoterpenes: a-pinene 0.1 – 10.5%, y-terpinene 0.1 – 9.1%, b-pinene 0.1 – 8.6%, limonene 0.2 – 2.3%, Ketones: 1.6 – 8% camphor. (Tisserand and Young)

Cautions

CO2:  Be cautious on highly sensitive skin.  Avoid camphor rich oils in young children, people with risk of epileptic seizures.  (Kerkhof)
Essential Oil:
Hazards: None known.  Contraindications: None know. (Tisserand and Young)

Indications for Use 

CO2:  This CO2 is used for colds and flu, as well as arthritis, rheumatic inflammations and pains and muscle soreness.  Also very helpful for oral mucositis (especially candida), digestive tract disorders (indigestion, colic and spasms. 
Essential Oil:
   Helpful for the digestive system including anorexia, diarrhea, dyspepsia, flatulence and nausea.  Its analgesic and antispasmodic properties are good for muscle aches and pains, rheumatism, migraines and neuralgia. Coriander will help to boost the immune system, so consider adding it to blends for colds, flu and general infections.

Emotional and Spiritual Conditions 

The CO2 extract and the Essential Oil have the same affects on emotional and spiritual conditions.  We use them for anxiety and depression; concentration and forgetfulness, fatigue and weakness as well as restlessness, stress and sleeplessness.   In Spiritual PhytoEssencing, Coriander has the themes of nervousness, exhaustion and chilliness.

I also have a mini profile on Coriander Essential Oil in the Article Archives.  Coriander is also one of the oils I have used for Heartburn.  Coriander is also one of the oils I listed as an option to choose from when creating your own Ho’oponopono Blend.

References
Tony Burfield, Natural Aromatic Materials – Odours & Origins, 2000
Ernst Guenther, The Essential Oil, Vol I-V, 1948 reprinted 1972
Madeline Kerkhof, CO2 Extracts in Aromatherapy, 2018
Julia Lawless, The Complete Aromatherapy & Essential Oils Sourcebook, 2017
Leung and Foster, Encyclopedia of Common Natural Ingredients, 1996
Tisserand and Young, 2nd Edition Essential Oil Safety, 2014