FACE BRIGHTENING TONER

Niacinamide & Alpha-Arbutin

100 g Batch | Target pH 5.5

INGREDIENTS

• Distilled Water — 89.4 g
• Niacinamide — 4.0 g
• Alpha-Arbutin — 1.0 g
• Glycerine — 3.0 g
• Panthenol — 1.0 g
• Euxyl PE 9010 — 0.8 g
• Sodium Citrate — 0.5 g
• Citric Acid — 0.3 g

Total: 100 g

Target final pH: 5.5

METHOD

Phase A — Water Phase

1. Sanitise your work area, equipment, utensils and packaging.
2. Weigh 89.4 g distilled water into your mixing vessel.
3. Add 0.5 g sodium citrate and mix until completely dissolved.
4. Add 3 g glycerine and mix.
5. Add 1 g panthenol and mix until dissolved.
6. Add 4 g niacinamide and mix until completely dissolved.
7. Add 1 g alpha-arbutin and mix gently until completely dissolved.

Phase B — Acid

8. Add 0.3 g citric acid gradually while mixing.
9. Mix thoroughly until completely dissolved.
10. Check the pH using a properly calibrated pH meter.

Phase C — Preservative

11. Add 0.8 g Euxyl PE 9010.
12. Mix thoroughly until the toner is completely uniform.

FINAL pH ADJUSTMENT

13. Allow the toner to stand for approximately 10–15 minutes.
14. Measure the pH again.
15. The target is pH 5.5.

If the pH is above 5.5, prepare a 10% citric acid solution and add it drop by drop, mixing and checking the pH after each addition.

If the pH is below 5.5, use a suitably diluted sodium hydroxide solution to raise the pH very gradually.

16. Once the pH reaches 5.5, mix thoroughly.
17. Recheck the pH after approximately 15 minutes to confirm it remains at or very close to 5.5.
18. Adjust the final weight to 100 g with distilled water if necessary.
19. Mix gently and fill into your sanitised bottle.

10% CITRIC ACID SOLUTION

For final pH adjustment:

• Citric Acid — 10 g
• Distilled Water — 90 g

Mix until completely dissolved.

Only use the amount required to adjust the finished toner.

PRODUCT SPECIFICATION

Appearance: Clear to slightly translucent liquid
pH: 5.5 ± 0.2
Niacinamide: 4%
Alpha-Arbutin: 1%
Panthenol: 1%
Glycerine: 3%
Euxyl PE 9010: 0.8%
Fragrance: None
Essential oils: None

INGREDIENT FUNCTIONS

Niacinamide — 4%
Helps improve the appearance of uneven skin tone and supports the skin barrier.

Alpha-Arbutin — 1%
Brightening active that helps improve the appearance of dark spots and uneven pigmentation.

Panthenol — 1%
Helps moisturise and soothe the skin.

Glycerine — 3%
Humectant that helps attract and retain moisture.

Sodium Citrate + Citric Acid
Form a citrate buffer system to help maintain the desired acidic pH.

Euxyl PE 9010 — 0.8%
Preservative for the water-based toner.

IMPORTANT – FACE BRIGHTENING TONER

The formula is designed around pH 5.5, but the actual final pH must still be measured with a calibrated pH meter. A formulation cannot reliably guarantee an exact pH of 5.5 without measurement because raw materials can vary.

For commercial production, conduct stability testing and preservative efficacy/challenge testing before selling the finished product.