[object Object]
| Ingredient | Risk Level | Notes |
|---|---|---|
| Ammonia (Ammonium Hydroxide) | Avoid | Harsh alkalizer; respiratory and scalp irritant |
| EDTA | Low Risk | Chelating agent; low direct toxicity |
| Hydrogen Peroxide (developer) | Caution | Standard oxidizer in developer |
| p-Phenylenediamine (PPD) | Avoid | Severe contact allergen; IARC Group 3 concern; higher concentration in dark shades |
| Resorcinol | Avoid | Endocrine disruptor; potential thyroid toxicant; skin sensitizer |