Cumin is the product most new importers start with and the one they most often get wrong. Not because it is complicated, but because the words used to sell it are loose.
Grade names are marketing, purity is a number
Singapore quality, Europe quality, machine clean, sortex clean. These are trade shorthand, not defined standards, and two exporters can mean slightly different things by the same phrase. The number that binds is the purity percentage written on the contract, along with the maximum admixture and moisture.
Write the numbers. If the offer says Europe quality and nothing else, ask what purity that is, then put the answer in the contract.
Ninety nine per cent purity and ninety nine point five per cent purity are separated by half a point on paper and by a real amount of money in the bag.
Volatile oil is the thing your customer tastes
Purity tells you what is not cumin. Volatile oil content tells you how much cumin flavour is there. Old crop, poor storage and heavy steam treatment all pull it down. If you are grinding for retail or extracting, ask for volatile oil on the certificate of analysis and set a minimum.
The trade off nobody mentions: steam sterilisation reduces microbiological counts and also strips volatile oil. If your market needs the counts, you accept the loss. Decide which you care about before you contract, not after the lab report arrives.
Admixture and what is actually in it
Admixture is other seed, stalk, stone, soil and dust. A lot at 98% purity has two kilos of that in every hundred. What matters is which two kilos. Stalk is annoying. Stone damages a mill. Foreign seed can be a food safety problem depending on which seed.
Ask for the admixture breakdown, not just the total. A supplier who can answer has actually looked at the lot.
Moisture is where lots go bad in transit
Cumin shipped at 10% moisture into a hot container across a long ocean leg is a mould claim waiting to happen. Contract a maximum, and for long transits contract it lower than you think you need. The extra drying costs less than the claim.
Four questions before you fix
- What purity, what maximum admixture, what maximum moisture, in writing?
- Which crop year, and when was it cleaned?
- Will the pre shipment sample be drawn from the actual contracted lot?
- What tolerance applies if arrival analysis differs, and against which sample?
The fourth question is the one that saves relationships. Agree the reference sample and the tolerance while everyone is still happy.
Sample properly
A showroom sample tells you what a supplier can find, not what they can ship. Ask for the sample to come from live stock, and for the pre shipment sample to be sealed and numbered against the lot. Keep your half. If a claim ever happens, the two sealed halves settle it in a day instead of a month.
Ranges and practices above reflect ordinary trade usage. Your contract terms are what govern your shipment.