Bromocresol purple
IUPAC: 2-bromo-4-[3-(3-bromo-4-hydroxy-5-methylphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]-6-methylphenol
| Formula / Notation | C21H16Br2O5S |
|---|---|
| CAS Number | 115-40-2 |
| Molecular Weight | 540.2 |
| Melting Point | 241.5 °C |
| Solubility | Soluble in alcohol, dilute alkalies |
| Appearance | Odorless, pale-yellow to purple solid; Available as pure compound, monosodium salt, and dilute solutions; [CHEMINFO] |
| Also Known As | 2-bromo-4-[3-(3-bromo-4-hydroxy-5-methylphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]-6-methylphenol; 115-40-2; BROMCRESOL PURPLE; HSDB 7729; DTXSID3059428; 201C22C3EC; Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[2-bromo-6-methyl-; NSC-374134; CHEBI:86154; Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis(2-bromo-6-methyl- |
| Category | Indicators |
What is Bromocresol purple?
Bromocresol purple is a member of the class of 2,1-benzoxathioles that is 2,1-benzoxathiole 1,1-dioxide in which both of the hydrogens at position 3 have been substituted by 3-bromo-4-hydroxy-5-methylphenyl groups. A hydrophilic dye that is used as a pH indicator and to measure serum albumin concentrations. It has a role as a dye, an acid-base indicator and a two-colour indicator. It is a polyphenol, an organobromine compound, a 2,1-benzoxathiole, a sultone and an arenesulfonate ester.
Formula & Notation
IUPAC Name: 2-bromo-4-[3-(3-bromo-4-hydroxy-5-methylphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]-6-methylphenol
Other Names / Synonyms: 2-bromo-4-[3-(3-bromo-4-hydroxy-5-methylphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]-6-methylphenol; 115-40-2; BROMCRESOL PURPLE; HSDB 7729; DTXSID3059428; 201C22C3EC; Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[2-bromo-6-methyl-; NSC-374134; CHEBI:86154; Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis(2-bromo-6-methyl-
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | 241.5 °C |
| Molecular Weight | 540.2 |
| Solubility | Soluble in alcohol, dilute alkalies |
| Appearance | Odorless, pale-yellow to purple solid; Available as pure compound, monosodium salt, and dilute solutions; [CHEMINFO] |
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Bromocresol purple is a member of the class of 2,1-benzoxathioles that is 2,1-benzoxathiole 1,1-dioxide in which both of the hydrogens at position 3 have been substituted by 3-bromo-4-hydroxy-5-methylphenyl groups. A hydrophilic dye that is used as a pH indicator and to measure serum albumin concentrations. It has a role as a dye, an acid-base indicator and a two-colour indicator. It is a polyphenol, an organobromine compound, a 2,1-benzoxathiole, a sultone and an arenesulfonate ester.
Used as a pH indicator in acid-base titrations, analytical chemistry, and chemical education demonstrations.
May be irritant or toxic in concentrated form. Handle with care. Consult SDS before use.
The formula or notation for Bromocresol purple is: C21H16Br2O5S