Rice Specs Decoded: Moisture, Broken %, and Purity (From Someone Who Argues About This Weekly)
Last Tuesday I had a buyer in Dubai email me at 11pm asking why one container of 1121 sella looked "different" from the previous shipment. Same mill. Same grade. Same paperwork.
The answer was moisture. 13.8% versus 12.4%. That's it. That was the whole disagreement.
And honestly, this happens more than I'd like to admit. Buyers sign contracts with specs they've copy-pasted from another deal, suppliers ship to those specs, and then somewhere between Karachi and Jebel Ali someone gets surprised. So I want to walk through the three numbers that actually matter on a rice contract — moisture, broken percentage, and purity — the way I'd explain them to a friend who's about to wire me money.
Moisture: the number that quietly decides everything
Moisture content is measured as a percentage of the grain's weight that is water. For long-grain basmati like our 1121 or Super Kernel, the international comfort zone is 12% to 14%. Most serious buyers in Saudi Arabia and the UAE write 13% max into the contract. Europe sometimes pushes for 12.5% max because of longer storage cycles and stricter pest protocols.
Here's why this one number matters more than people think.
Rice at 14.5% moisture looks fine. Smells fine. Cooks fine on day one. But put it in a 40-foot container crossing the equator, sitting in Mombasa port for three weeks waiting on customs, and you've got a fungal problem. Aspergillus doesn't need much. Just warmth and water activity above a certain threshold.
On the other side — rice that's too dry (below 11.5%) breaks during milling and transit. You'll pay for whole grain and receive broken. The mill loves it because they can ship more weight at lower hydration. The buyer loses on yield.
So when I see a contract that just says "moisture: standard," I push back. Standard according to who? Write the number. 13% max, tested at loading, tested again at discharge if you want, with a tolerance band of 0.5% for instrument variance.
I got this wrong early in my career. Accepted "as per international norms" on a paperwork line. Norms turned out to mean whatever the surveyor felt like that morning.
Broken percentage: where most disputes actually start
Broken rice is exactly what it sounds like — kernels that are less than three-quarters the length of a full grain. The percentage tells you how much of your shipment is broken versus whole.
The common grades you'll see from Pakistan:
- 2% broken — premium, mostly 1121 steam and Super Kernel for Gulf retail
- 5% broken — the workhorse for foodservice and mid-tier retail
- 10-15% broken — bulk African markets, biryani houses, institutional
- 100% broken — a separate product, sold for specific cuisines and brewing
The trap? A contract that says "5% broken max" without defining how it's measured. Because there are at least three methods floating around — Pakistani standard, Indian BIS, and the FAO grain length method. They don't all agree. A lot can sit between 4.8% and 6.2% depending on who's holding the sieve.
What I tell buyers: specify the testing method. SGS, Cotecna, or Intertek at port of loading, with a 1% tolerance. If the spec says 5%, anything up to 6% should be accepted, and beyond that there's a price adjustment formula already baked into the contract. Don't leave that math for after the dispute.
Also — and this is something I learned from a Nigerian importer who knew his stuff — broken percentage drifts upward in transit. Rough handling at the port, badly stuffed containers, long sea voyages. A shipment that left Karachi at 4.3% can land at 5.1%. That's physics, not fraud. Build that into your acceptance criteria.
Purity, admixture, and the things nobody reads carefully
Purity is the part of the spec sheet most buyers skim. Big mistake.
Purity refers to varietal purity — what percentage of the grains in your bag are actually the variety you ordered. If you bought 1121 basmati, how much of it is genuinely 1121 versus other long-grain varieties that snuck in during milling or storage?
For genuine 1121, anything above 92% varietal purity is good. 95%+ is premium. Below 88% and you're being sold a blend, regardless of what the label says.
Then there's admixture — the foreign matter category. Stones, husk, damaged kernels, immature grains, paddy, red grains, chalky grains. Each has its own sub-limit. A typical Saudi import contract for our Super Kernel might read:
- Foreign matter: 0.1% max
- Damaged grains: 1% max
- Chalky grains: 3% max
- Red grains: 1% max
- Paddy: 5 grains per kg max
Look, here's the thing. These numbers feel pedantic until you receive a container with 2% damaged kernels and your retail customer rejects the whole lot. Then suddenly every decimal matters.
DNA testing for varietal purity exists and it's not as expensive as people assume — around $80-120 per sample through labs in Dubai or Singapore. For any buyer doing more than 10 containers a year of premium basmati, I'd say run it on every third shipment. Random, unannounced. It keeps everyone honest, including suppliers like us.
A quick word on how these three interact
Moisture, broken percentage, and purity aren't independent variables. High moisture causes more breakage during transport. Heavy milling to reduce broken percentage damages varietal characteristics that purity tests pick up. A mill chasing one number will quietly worsen another.
This is why I'm suspicious of suppliers who hit every spec perfectly on paper at suspiciously low prices. Something somewhere is being shaved.
If you're buying Pakistani rice — from us at Acme Global or from anyone else — and you only remember three things from this post: write the moisture number explicitly, define the broken percentage testing method, and don't ignore the purity clause just because it's at the bottom of the spec sheet.
What's the worst spec dispute you've had on a rice contract? I'm curious whether it was one of these three or something stranger.