Quality & Compliance

Understanding ISO 3632: The International Standard for Saffron Quality

The international benchmark governing commercial saffron grading. ISO 3632 evaluates chemical purity, moisture, and active compound concentration through UV-Vis spectrophotometry.

Saffron is one of the most adulterated spices in the world, which is exactly why ISO 3632 exists. Published by the International Organization for Standardization, ISO 3632-1 is the recognized laboratory standard for grading saffron — replacing vague marketing terms like "premium" or "Grade A" with three measurable, spectrophotometric values: crocin, safranal, and picrocrocin. For B2B buyers, understanding these three numbers is the difference between sourcing on trust and sourcing on evidence.

The Three Parameters ISO 3632 Actually Measures

Crocin — Coloring Strength (tested at 440nm)
Crocin is the carotenoid pigment responsible for saffron's deep red-gold color, and it's the most commonly cited number in a lab report. The higher the crocin value, the more intense the coloring power per gram — meaning less product is needed to achieve the same visual and culinary effect, which directly affects a manufacturer's cost-per-batch.

Safranal — Aroma Strength (tested at 330nm)
Safranal is the volatile compound behind saffron's distinctive honey-hay fragrance. Unlike crocin and picrocrocin, ISO 3632 sets both a minimum and a maximum for safranal (typically 20–50), since an unusually high reading can actually indicate improper drying or degradation rather than superior quality.

Picrocrocin — Flavor Strength (tested at 257nm)
Picrocrocin produces saffron's characteristic bitter, slightly medicinal taste — the compound that breaks down into safranal during drying and storage. It's the parameter most directly tied to genuine flavor intensity in finished products.

How the Categories Break Down

ISO 3632-1 groups saffron into quality categories based on the lowest-scoring parameter a batch achieves — a batch isn't classified by its best number, but by its weakest one:

  • Category I requires a minimum crocin value of 200, a minimum picrocrocin value of 70, and a safranal range of 20–50.

  • Category II requires a minimum crocin value of 170, a minimum picrocrocin value of 55, and a safranal range of 20–50.

  • Category III requires a minimum crocin value of 120, a minimum picrocrocin value of 40, and a safranal range of 20–50.

Why This Matters When You're Sourcing, Not Just Cooking

For a food manufacturer or distributor, ISO 3632 numbers are the only objective way to compare saffron across suppliers and origins. Two batches can look visually identical while differing enormously in actual potency — which is why a Certificate of Analysis (COA) from an accredited lab, not the seller's own description, should be the basis of any purchasing decision. A genuine COA will state the exact crocin, safranal, and picrocrocin readings for that specific batch, not a generic range for the product line.

At RosaTam, every batch we supply comes with its own batch-specific COA, so you can verify the category classification yourself before it reaches your production line — not take our word for it.

Looking for Saffron Through an EU-Based Company?

If you are an importer, wholesaler, distributor, retailer, food manufacturer, HoReCa supplier, or private-label company looking to source saffron through an EU-based company, contact RosaTam OÜ.
Based in Estonia, RosaTam OÜ serves B2B customers looking for professional saffron sourcing, commercial quantities, private-label opportunities, and long-term supply cooperation in the European market.
For professional saffron sourcing in the EU, contact RosaTam OÜ.

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Verified ISO 3632 Batch Analysis

Every RosaTam bulk consignment includes a comprehensive European laboratory COA with documented UV-Vis absorbance readings.