Guide · turmeric

How to check turmeric powder at home

పసుపు · हल्दी · हरिद्रा · Pasupu · Haldi

FSSAI's standard says turmeric powder must be free from added colouring matter, including lead chromate, and from foreign starch. Its testing manual lists what inspectors check turmeric for: added dyes such as metanil yellow, lead salts, and chalk powder.

Some of this you can check in your kitchen, and some only a lab can find. This guide covers both, plus two popular tests that do not work for turmeric. Try them on any turmeric you buy, ours included.

The water checkLeft: the powder has settled and the water is pale yellow. Right: strong yellow trails ran from the powder as it sank, and the water turned deep yellow. That one is worth a lab test.

In short

Sprinkle a teaspoon of turmeric on a glass of water and let it settle without stirring. Turmeric sinks and leaves the water pale yellow; water that turns strong yellow straight away points to added colour. This check cannot find lead chromate or chalk, so for a sure answer, use a food testing lab. Skip the iodine test: turmeric is starchy to begin with.

ఒక గ్లాసు నీటిపై చెంచా పసుపు చల్లి, కలపకుండా అలాగే ఉంచండి. పసుపు అడుగుకు చేరి, నీళ్లు లేత పసుపు రంగులో ఉంటాయి. నీళ్లు వెంటనే ముదురు పసుపు రంగులోకి మారితే, రంగు కలిపి ఉండొచ్చు. లెడ్ క్రోమేట్, సుద్ద పొడిని ఈ పరీక్ష పట్టుకోలేదు; వాటికి ల్యాబ్ పరీక్ష కావాలి. పసుపులో ముందునుంచే పిండిపదార్థం ఉంటుంది కాబట్టి అయోడిన్ పరీక్ష పసుపుకు పనికిరాదు.

एक गिलास पानी पर एक चम्मच हल्दी छिड़कें और बिना हिलाए छोड़ दें। हल्दी नीचे बैठ जाती है और पानी हल्का पीला रहता है। अगर पानी तुरंत गहरा पीला हो जाए, तो रंग मिलाया गया हो सकता है। लेड क्रोमेट और चॉक पाउडर इस जाँच में नहीं पकड़े जाते, उनके लिए लैब टेस्ट ज़रूरी है। हल्दी में पहले से स्टार्च होता है, इसलिए आयोडीन टेस्ट हल्दी पर काम नहीं करता।

What FSSAI checks turmeric for

Added dyes: Such as metanil yellow, which can make dull turmeric look brighter. FSSAI does not allow added colour in turmeric.
Lead chromate and other lead salts: Lead chromate is a yellow pigment used in paint. Stanford-led studies published in 2019 and 2024 found it in turmeric from parts of South Asia. FSSAI does not allow it in turmeric at all.
Chalk powder: A cheap white powder that adds weight.
Foreign starch: Flour or starch from other crops. FSSAI's standard rules it out too.

Check 1: the water glass

Fill a clear glass with water at room temperature.
Sprinkle one level teaspoon of turmeric powder on top. Do not stir.
Watch the first minute as the powder sinks. Look for coloured trails running down from it.
Leave it for 15 to 20 minutes. Then hold the glass against a white wall or a sheet of paper and look at the water above the settled powder.

Pale yellow water, powder at the bottom

No sign of added dye.

Strong yellow trails, or deep yellow water within minutes

Possible added colour. Stop using that batch and get it tested.

Why it works. Turmeric's own yellow, curcumin, hardly dissolves in water, so the powder sinks and only tints the water. Dyes such as metanil yellow dissolve easily and colour the water fast.

What it misses. Lead chromate and chalk do not dissolve in water either, so turmeric mixed with them can pass this check. Only a lab test can rule them out.

Very fine powder can keep the water cloudy for a while. Cloudy is fine; a clear, strong yellow is what to look for.

Check 2: if you buy whole turmeric

Snap a finger of dried turmeric in half. Turmeric is yellow-orange right through, so the inside should look much like the outside. A bright yellow skin over a pale or dull core can mean colour was added to the surface. Ask the seller about it, or get it tested.

Two tests to skip

The iodine test

Iodine turns blue-black when it meets starch, and it is often suggested for spotting flour in turmeric. But turmeric is starchy itself, so it turns blue-black either way. That is why FSSAI's own manual uses the iodine test for powdered spices other than turmeric.

Acid tests at home

FSSAI's tests for lead, metanil yellow and chalk in turmeric use concentrated hydrochloric or sulphuric acid. These acids burn skin and eyes. They belong in a lab, not a kitchen.

For a sure answer: a food testing lab

A NABL-accredited food testing lab can test turmeric for lead and for added colours. Ask the lab how much sample it needs, keep the powder in its sealed pack or a clean sealed bag, and note the batch number printed on the pack. FSSAI publishes a list of notified food testing labs on its website.

Read the pack before you buy

An FSSAI licence or registration number. You can look it up on FSSAI's FoSCoS website.
The name and address of whoever made or packed it.
Net quantity, MRP, a batch or lot number, and a best-before date.
Where it was grown. Turmeric from different regions differs in colour, so a named region helps you compare like with like.

Keep it well

Keep the pack zipped shut, or move the powder to a dry, airtight jar.
Use a dry spoon. A damp spoon is what makes turmeric lumpy.
Keep it out of direct sunlight, which fades the colour.
Use it within the best-before date on the pack.

Questions

Is very bright yellow turmeric a bad sign?

Not by itself. Colour changes with the variety, where it was grown and how it was dried and ground, so turmerics differ a lot. What matters is colour that leaves the powder too easily, as in the water check.

Can the water check show that turmeric has no lead?

No. Lead chromate does not dissolve in water, so the water check cannot see it. Only a lab test can.

Why does turmeric go lumpy?

Moisture. A wet spoon or an open pack lets the powder take in water. Break the lumps with a dry spoon and keep the pack sealed.

What should I do if a check looks wrong?

Stop using that batch, keep the pack, and contact the seller with the batch number. You can also report it to FSSAI through its Food Safety Connect app. If it is ours, WhatsApp us a photo of the pack and the glass.