Bromocresol Purple CAS 115-40-2
| CAS No. | 115-40-2 |
| Molecular Formula | C21H16Br2O5S |
| Molecular Weight | 540.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Bromocresol Purple.
Bromocresol Purple (CAS 115-40-2), molecular formula C21H16Br2O5S and molecular weight 540.22 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a flavonoid core, a sulfone group, a hydroxyl group, an ether linkage, bromine substitution, Bromocresol Purple is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 540.22 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
CATO manufactures Bromocresol Purple under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C21H16Br2O5S |
| Molecular Weight | 540.22 g/mol |
| Purity | >95% |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related Bromocresol Standards
Recommended Standards
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- 4-[(3-Nitrophenoxy)methyl]piperidine (CAS 946725-50-4)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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