C21H16Br2O5S
540.2 g/mol
Dye & PigmentWarning
Bromocresol purple
CAS115-40-2EC204-087-8
Category
Dye & Pigment
Compound Class
Aromatic
Primary Use
pH indicator dye
Bromocresol purple is a sulfonphthalein dye used primarily as a pH indicator. It changes color from yellow to purple over the pH range of 5.
pH indicatormeasurement of serum albumin concentrations
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
Sourcing Bromocresol purple?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
Related Compounds
ApplicationSame Use
Thymolphthalein
CAS125-20-2
pH indicator dye
ReferenceSame Category
Violanthrone
CAS116-71-2
Vat dye
ReferenceSame Category
1,4-bis(mesitylamino)anthraquinone
CAS116-75-6
Solvent dye
ReferenceSame Category
Bromamine acid
CAS116-81-4
Intermediate for anthraquinone dyes
ReferenceSame Category
Sulfan Blue parent
CAS116-95-0
Acid blue dye for textiles
Referencesame scaffold
Bromocresol green
CAS76-60-8
pH indicator dye
Referencesame scaffold
Bromthymol blue
CAS76-59-5
pH indicator
Referencesame scaffold
DIDNTB
CAS145551-16-2
research compound
Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for Bromocresol purple (CAS 115-40-2) is 2934.99.
HS code (international, 6-digit)
2934.99
EU CN code (8-digit)
2934 99 90
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
2-bromo-4-[3-(3-bromo-4-hydroxy-5-methylphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]-6-methylphenol
InChIKey
ABIUHPWEYMSGSR-UHFFFAOYSA-N
SMILES
CC1=CC(=CC(=C1O)Br)C2(C3=CC=CC=C3S(=O)(=O)O2)C4=CC(=C(C(=C4)C)O)Br
Synonyms (32)
- BROMCRESOL PURPLE
- Bromkresolpurpur
- Bromocresol Purpura
- Bromocresol Roxo
- Bromocresol purple
- Bromocresol purple free acid
- Pourpre de bromocresol
- Purple, Bromcresol
- Purple, Bromocresol
- Purpura de bromocresol
Sourcing Bromocresol purple?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.