Bromofenol mavisi (C₁₉H₁₀Br₄O₅S), yaygın olarak pH göstergesi, moleküler biyolojide izleme boyası (tracking dye) ve laboratuvar boyası olarak kullanılan organik bir bileşiktir.

Empirical Formula (Hill Notation): C₁₉H₁₀Br₄O₅S
CAS Number:115-39-9
Molecular Weight: 669.96
UNSPSC Code: 12171502
EC Index Number: 204-086-2
NACRES: NA.21
MDL number: MFCD00005875
Product Name: Bromophenol blue, indicator ACS,Reag. Ph Eur
Grade: ACS reagent
Quality Segment: 200
Agency: reag. Ph. Eur.
Form: solid
Loss: ≤1% loss on drying, 110°C
Visual transition interval: 3.0-4.6, greenish yellow to blue-violet
mp: 270-273 °C (decomposition)
Bulk density: 730 kg/m³
Storage temp.: 2-30°C