DropBio
DropBrigt® 4BR 4-Butylresorcinol Powder Cosmetic Ingredient
DropBrigt® 4BR 4-Butylresorcinol Powder Cosmetic Ingredient
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This is a made-to-order item. It typically ships in 1-2 days if in stock, otherwise the delivery takes about 10-14 days.
DropBrigt® 4BR ( 4-butylresorcinol) is a potent inhibitor of tyrosinase activity.
- Trademark: DropBright ®4BR
- INCI Name: 4-Butylresorcinol
- CAS number: 18979-61-8
- Appearance: White or off-white crystal powder
- Analysis: (HPLC) ≥99.0%
- Package: 1Kg/bag, 25kg/barrel
DropBrigt®4BR (4-butylresorcinol) has a potent inhibitory effect on tyrosinase activity. On the one hand, it can bind to the double copper ion of tyrosinase, the active site of tyrosinase, which competitively inhibits tyrosinase.

- Before melanin synthesis, it inhibits tyrosinase synthesis and glycosylation, preventing the enzyme from being absorbed into melanosomes.
- Inhibition of enzyme activity that acts as a competitive inhibitor of tyrosinase and TRP1 enzymes during melanin synthesis reduces the production of melanin-specific byproducts.
- After melanin synthesis, tyrosinase increases the breakdown of melanocytes, inhibiting keratinocyte migration and acting as a fatty acid photo-removal agent. This function is enhanced by the presence of fatty acids, which regulate tyrosinase breakdown.

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