This Patchouli is iron free because it is distilled in stainless steel vessels as opposed to the crude iron vessels of past.
Therapeutic Benefits of Patchouli, Iron Free - 5 YearAnti-anxiety, Anti-bacterial, Anti-depressant, Anti-fungal, Anti-inflammatory, Anti-septic, Cicatrisant, Cooling, Deodorant, Insect repellent, Sedative, Tonic
Aroma-Chemistry of Patchouli, Iron Free - 5 Year
Traditionally patchouli was distilled in crude iron vessels(and it is still done so to produce the dark patchouli) and the interaction between the patchouli and the iron during distillation results in a the presence of iron in the dark patchouli. But in recent times many distillers have started using stainless steel vessels for distillation and this produces the “light” or “iron free” patchouli.