Is Strontium Hydroxide natural? NOI 1.00

Q: Is Strontium Hydroxide natural?

Strontium Hydroxide has a Natural Origin Index (NOI) of 1.00 (scale 0–1) per ISO 16128. Strontium hydroxide is an inorganic mineral compound; the hydroxide and metal-ion fragments both count as natural origin. An NOI of 1.00 means 100% of its molecular mass is traceable to a natural, renewable source.

How we scored it

Sr(OH)2, 121.63 Da, mineral hydroxide of strontium — mineral origin, n=1. 1.0.

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

Strontium Hydroxide is produced from mined strontium ores such as celestine or strontianite. It is classed as mineral, non-petroleum origin.

In plain English

An inorganic mineral compound, the hydroxide salt of strontium, sourced from mined strontium ores rather than plant or animal material.

Structure

strontium dihydroxide

PubChem CID 87672 ↗

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.
2Strontium Hydroxide. PubChem CID 87672. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
3STRONTIUM HYDROXIDE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
4Strontium hydroxide. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=Strontium%20hydroxide