Besan — Metanil Yellow and Kesari Flour Are Lab-Confirmation Checks

Why besan is a common authenticity concern

FSSAI guidance notes that besan can be substituted with cheaper flours and can also be coloured to look brighter. Examples discussed include maize, yellow pea, rice and Kesari flour, as well as Metanil Yellow. Because besan is already a fine powder, visual inspection alone cannot reliably tell which flour or dye may be present.

The Metanil Yellow procedure uses chemicals

FSSAI's guidance describes an alcohol-and-hydrochloric-acid colour reaction for Metanil Yellow in besan. Hydrochloric acid is corrosive, and a consumer app should not expose the quantities or encourage kitchen handling. The method can be referenced as the reason official confirmation exists, but not converted into a step-by-step household card.

Kesari flour confirmation is also not a simple kitchen check

Older rapid guidance uses acid and heating, while current analytical manuals include chromatography or capillary electrophoresis for Kesari dal powder in besan and other flours. Those are laboratory techniques. Kitchen Check should not imply that shape-based visual identification of whole Kesari dal can be transferred reliably to a powder such as besan.

What a consumer can still inspect

Check the pack seal, ingredient declaration, FSSAI licence information where applicable, batch, packed date and seller. FSSAI also advises avoiding besan with unpleasant odour, bitter or gritty sensory quality, or visible insects. These observations can tell you that a product deserves caution, but they do not identify a specific adulterant.

Do not taste suspicious besan for confirmation

If a product smells unusual, appears contaminated or is already strongly suspected of adulteration, do not taste raw besan to investigate. Taste is not a safe confirmation method. Keep the product separate from cooking and move to traceability or official testing instead.

Preserve an uncontaminated sample

Do not add household acid, alcohol, iodine or other materials to the whole packet. If a complaint or test may follow, keep most of the sample unchanged. Note the brand, batch, purchase location and date. A clean sample and clear traceability are more useful than a home experiment that cannot be verified.

Recommended result wording

This record should say 'Official chemical/analytical confirmation required'. It can explain why the home workflow stops and offer a sample-preservation checklist. It should never produce a fake yes/no answer from colour, smell or texture alone.

Use simple purchase checks before a dispute grows

For besan, traceability is often more practical than experimenting at home. Compare the product name, ingredient declaration, pack seal, batch and seller with the receipt or online order. If the flour repeatedly has an unusual odour, insects, strong colour or gritty quality, document those observations. They do not identify the adulterant, but they create a clear record for a seller complaint or food-safety follow-up.