Common Name(s): Kbro3,wave neutraliser,oxidative neutraliser

DESCRIPTION

What It Does: Provides controlled disulfide bond reformation to set permanent wave structure after reduction.

Why It's Used: Professional standard permanent wave neutraliser providing even, controlled disulfide bond reformation for consistent wave setting.

How It Works: Bro3⁻ oxidises thiols (–sh) back to disulfides (–s–s–) at controlled rate. more controlled oxidation rate vs h2o2 for even wave setting. does not bleach hair (unlike h2o2). sets new hair configuration permanently.

Typically Found In: Professional permanent wave neutraliser

TECHNICAL DETAILS

Primary Category: Hair treatment – permanent wave neutraliser

Secondary Functions: Skin conditioning

Application Areas:

Typical Concentration Range: 1%–3%

SOURCING & ETHICS

Vegan Status: Yes – synthetic

Halal Status: Yes

Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Well-tolerated by most skin types.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Environmental persistence concern. some jurisdictions restricting. potential mutagenicity at high internal doses (not topical). h2o2 neutraliser preferred in some markets.

Works Well With: Standard skincare actives

Avoid Combining With: No known significant incompatibilities

SCIENTIFIC NOTE

Potassium bromate was long the professional standard wave neutraliser because its slower, more controlled oxidation rate (vs h2o2's faster, potentially uneven oxidation) provides more uniform disulfide reformation across the hair fiber cross-section. however, bromate's environmental persistence (detected in drinking water supplies from runoff) drove development of sodium perborate and h2o2 alternatives in environmentally conscious markets.

Last Verified: Cosing database,eu annex iii,cir safety assessment

Primary Sources: 2026-03-12