Formula 3. Air-oxidative hair dye11

5,6-Dihydroxyindole (and) 5,6-dihydroxyindole-2-carboxylic acid (9:1), 1% 25.00% w/w
Monoethanolamine 1.50
Ascorbic acid 0.30
Sodium sulfite  0.20
Acrylates/C10-30 alkyl acrylate crosspolymer (Carbopol ETD2020, Noveon/Lubrizol) 0.37
INCI: not provided (Silicone CF 2470) 1.00
1,3-Butylene glycol  3.00
C12-14 Sec-pareth-9 (Softanol 90, Nippon Shokubai) 1.50
Eucalyptus extract 0.10
Fragrance (parfum) 0.05
Phosphoric acid qs to pH 10.1
Water (aqua) qs to 100.00

*Note: Filled in an aerosol container with liquefied petroleum gas