What the law says about peroxide in India and the EU.
The 6% cap is not arbitrary. A short guide to the consumer-safety regulations that govern what's in the box you can legally buy.
Photo: www.kaboompics.com / PexelsIf you've imported a whitening kit from Amazon US and wondered why the strips feel stronger than the ones at home, this is why.
The EU rule (2012, still current)
EU Directive 2011/84/EU caps hydrogen peroxide in over-the-counter consumer whitening at 0.1%. Products containing between 0.1% and 6% can only be sold for professional application by a registered dental practitioner — the dentist applies the first session, then can give you the rest for at-home use. Above 6% is banned in cosmetics entirely.
This affected most major European whitening brands' OTC strip lines, which now sit at the 0.1% line for sale-without-prescription.
The Indian rule
India broadly follows the Drug & Cosmetic Rules under the Drugs & Cosmetics Act. Cosmetic-classification whitening products typically cap at 6% hydrogen peroxide (or equivalent ~16% carbamide peroxide) for consumer sale. Anything above is classified as a dental device and requires prescription/professional application.
In practice, the strongest legitimately available at-home strip in India hits 6% HP. Anything claiming 10% or 12% sold as "consumer" is either grey-market import, mislabelled, or non-compliant.
The US is different
The US has no FDA cap on consumer whitening peroxide — concentrations of 10–22% are widely sold OTC. This is why imported American kits feel stronger. It's also why importing them into India is legally complicated and not advised.
Why 6% is the right number
Above 6% hydrogen peroxide:
- Gum irritation increases sharply at any unintentional contact
- Sensitivity probability rises from ~30% to ~60% of users
- Pulp damage becomes a measurable risk at very high concentrations with extended contact
- The marginal whitening benefit plateaus — going from 6% to 10% doesn't lift you that much faster
The EU and Indian thresholds are well-calibrated. The US market is the outlier.
Strong enough to work. Mild enough to use yourself.
Carbamide peroxide equivalence
Carbamide peroxide breaks down into ~⅓ hydrogen peroxide. So:
- 10% carbamide ≈ 3.5% HP (mild)
- 16% carbamide ≈ 5.3% HP (consumer-cap)
- 22% carbamide ≈ 7.3% HP (above EU/India consumer-cap)
If a tray gel says 16% carbamide, that's similar in working strength to a 5% hydrogen peroxide strip, just released over a longer wear window.
Look for the active concentration as a percentage. If the box says "advanced whitening formula" but no percentage, the concentration is likely well below 4% — the brand is being marketing-vague. Real products print the number.
6% is the working ceiling. Higher is professional turf.
More: how whitening works — the chemistry these caps regulate.
Disclaimer. Editorial, not legal or medical advice. Regulations change; check current local guidance.