Nomenclature for Natural Complex Substances on the IFRA Transparency List

In the 2022 edition of the IFRA Transparency List, there are 992 Natural Complex Substances (NCSs).

These NCSs feature additional identifiers that allows users of the List to understand the origin or the processing of natural ingredients, or the part of the plant from which the natural ingredient is derived. 

IFRA and the Research Institute for Fragrance Materials (RIFM) set up this specific nomenclature, which consists of:

letter representing the botanical parts used for the preparation of the NCS; and

a number indicating the processing (type of extract).

 

The full list of numbers and letters appears below.

Letters representing the botanical parts used

Botanicals and others are defined as

A = Root (e.g. Angelica root oil)

B = Moss (e.g. Oakmoss extract)

C = Bark (e.g. Cinnamon bark oil)

D = Wood (e.g. Sandalwood oil)

E = Leaf/Twig (e.g. Cassia oil)

F = Flower (e.g. Rose petals oil)

G = Fruit (e.g. Orange peel oil)

H = Seed (e.g. Coriander seed oil)

I = Algae (e.g. Seaweed absolute)

J = Animal by-products (e.g. Beeswax absolute)

K = Exudate (e.g. Olibanum oil)

L = Twig (e.g. Clove stem oil)

M = Multiple (e.g. Fusel oil; could be obtained from grain, grape, rice, etc.)

Numbers representing processing (type of extract)

Processing is defined as the following (the ISO Norm 9235 was followed and amended as necessary):

2.1 = Absolute

2.1.1 = Extract of absolute
2.1.2 = "x-less" absolute

2.2 = Alcoholate

2.3 = Aromatic water

2.4 = Balsam

2.5 = Essential oil by cold expression

2.6 = Folded essential oil

2.7 = Concrete

2.8 = Distillate generic

2.9 = Dry-distilled oil (e.g. Cade oil)

2.9.1 = Dry-distilled pyrogenated oil 
2.9.2 = Dry-distilled pyrogenated oil, purified by steam distillation

2.10 = Essential essence oil (from fruit juice)

2.11 = Essential oil generic

2.12 = Essential oil by steam distillation (e.g. Ylang oils)

2.12.1 = Essential oil obtained by steam distillation first grade
2.12.2 = Essential oil obtained by steam distillation second grade
2.12.3 = Essential oil obtained by steam distillation third grade
2.12 X = Essential oil obtained by steam distillation Extra grade
2.12 XS = Essential oil obtained by steam distillation Extra Super grade

2.13 = Extract generic

2.14 = Exudate (not gums and balsams)

2.15 = Gum

2.16 = Gum oleoresin

2.16.1 = Gum oleoresin rectified (e.g. turpentine stump oil)

2.17 = Gum resin

2.18 = Natural oleoresin exudate

2.19 = Natural raw material (includes fermentation)

2.20 = Non-concentrated extract

2.21 = Oleoresin (derived)

2.22 = Pomade

2.23 = Post treated

2.24 = Rectified essential oil

2.25 = Resin

2.26 = Resinoid

2.27 = Supercritical extract

2.28 = "Terpene-less and sesquiterpene-less" essential oil

2.29 = "Terpene-less" essential oil

2.30 = Terpenes

2.31 = Tincture and infusions

2.32 = Volatile concentrate

2.33 = "x-less" essential oil (e.g. partly dementholised)

2.50 = Fixed oil by cold expression

2.51 = Essential oils obtained with significant changes in their composition

2.52 = Ultrasonic extraction

2.53 = Microwave extraction

2.54 = Solvent extraction of distillation water

2.55 = Chemically-modified essential oil

2.56 = Terpeneless extraction from fruit juice