Bromocresol green- BCG,  trifenilmetan ailesine ve sülfonftalein grubuna ait sentetik bir boyadır. Genellikle pH indikatörü ve laboratuvar reaktifi olarak kullanılır.

Empirical Formula (Hill Notation): C₂₁H₁₄Br₄O₅S
CAS Number: 76-60-8
Molecular Weight: 698.01
UNSPSC Code: 41116100
EC Index Number: 200-972-8
NACRES: NB.21
MDL number: MFCD00005874
Product Name: Bromocresol green, indicator ACS,Reag. Ph Eur
Grade: ACS reagent
Quality Segment: 200
Agency: reag. Ph. Eur.
Form: solid
Loss: ≤3% loss on drying, 110°C
Visual transition interval: 3.8-5.4, yellow-green to blue
mp: 217-218 °C
Bulk density: 350 kg/m³
Storage temp.: no temp limit