Coal Tar has a Natural Origin Index (NOI) of 0.00 (scale 0–1) per ISO 16128. Coal tar is an unrefined fossil-fuel byproduct of the same non-renewable, non-biological class as petroleum distillates. An NOI of 0.00 means 0% of its molecular mass is traceable to a natural, renewable source.

Is Coal Tar natural? NOI 0.00

How we scored it

Coal is a fossil hydrocarbon feedstock; destructive-distillation byproduct contains only fossil-derived aromatics → 0.0, treated as petrochemical by this site's convention.

What counts. ISO 16128-2 scores the atoms that remain in the final ingredient. Reagents, solvents, catalysts and protecting groups used during manufacture leave no mass behind and are not counted.

Where it comes from

A byproduct of the destructive (coke-oven) distillation of bituminous coal, a fossil fuel. No natural/renewable route exists.

In plain English

A thick byproduct of processing coal (a fossil fuel) into coke, used in anti-dandruff and skin treatments. Comes from fossil fuel, not a renewable source.

CosIng definition: Coal Tar is a thick liquid or semi-solid obtained as a by-product in the destructive distillation of bituminous coal

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References

1ISO 16128-1:2016 and ISO 16128-2:2017 — Guidelines on technical definitions and criteria for natural and organic cosmetic ingredients and products. ISO, Geneva.
2COAL TAR. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
3COAL TAR. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=COAL%20TAR