Molekula
Bromophenol Blue sodium salt
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Bromophenol Blue sodium salt is a pH indicator commonly used in biochemical assays and electrophoresis to monitor pH changes and track molecular migration. It appears as a dark blue crystalline powder and is soluble in water and ethanol. Available in powder form with a molecular weight of 691.94 g/mol, CAS number 34725-61-6, and molecular formula C19H9Br4O5SNa. Stable at ambient storage conditions. Molekula supplies Bromophenol Blue sodium salt from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
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25 g — £108.90 per pack ex VAT · £130.68 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | Dark green/ dark blue powder |
| Clarity in Solution | To pass test |
| Loss on Drying (110°C, 1hr) | <5.0% |
| Visual Transition Interval | From pH 3.0 (yellow) to pH 4.6 (blue) |
| Absorptivity 1%/1cm (pH 3.0) at Lambda max 438nm. (pH 4.6) at Lambda max 591nm | 438nm: 320-370. 591nm: 880-950 |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
Identification
| Property | Value |
|---|---|
| SKU | 11223423 |
| CAS Number | 34725-61-6 |
| IUPAC Name | sodium 2-[(2,6-dibromo-4-hydroxyphenyl)-(2,6-dibromo-4-oxocyclohexa-2,5-dien-1-ylidene)methyl]benzenesulfonate |
| EC Number | 252-170-2 |
| Molecular Formula | C19H9Br4O5SNa |
| Molecular Weight | 691.94 |
| Exact Mass | 691.6761 |
| SMILES | C1=CC=C(C(=C1)C(=C2C(=CC(=O)C=C2Br)Br)C3=C(C=C(C=C3Br)O)Br)S(=O)(=O)[O-].[Na+] |
| InChIKey | LNYRQUVFLCYJCJ-UHFFFAOYSA-M |
| InChI | InChI=1S/C19H10Br4O5S.Na/c20-12-5-9(24)6-13(21)18(12)17(19-14(22)7-10(25)8-15(19)23)11-3-1-2-4-16(11)29(26,27)28;/h1-8,24H,(H,26,27,28);/q;+1/p-1 |
| PubChem CID | 76972649 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 29147990 |
| Tariff Code | 2914790090 |
Safety & GHS
Precautionary statements
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P308+313 IF exposed or concerned: Get medical advice/attention
- P501 Dispose of contents/container to an approved waste disposal plant
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 3,3',5,5'-TETRABROMOPHENOLSULFONPHTHALEIN, SODIUM SALT
- BROMPHENOL BLUE SODIUM SALT
- Phenol, 4,4'(1,1dioxido3H2,1benzoxathiol3ylidene)bis(2,6dibromo, monosodium salt
- Sodium bromophenol blue
Frequently asked questions
What is Bromophenol Blue sodium salt used for?
It is primarily used as a pH indicator in laboratory settings, particularly in electrophoresis and titrations, where it changes color in response to pH changes.
What is the chemical formula and molecular weight of Bromophenol Blue sodium salt?
The formula is C19H9Br4O5SNa with a molecular weight of 691.94 g/mol.
How should Bromophenol Blue sodium salt be stored?
It should be stored at ambient temperature, protected from moisture and light.
What grade of Bromophenol Blue sodium salt does Molekula offer?
Molekula supplies Bromophenol Blue sodium salt in analytical grade.
Can Molekula supply Bromophenol Blue sodium salt in bulk quantities?
Yes, Molekula can supply Bromophenol Blue sodium salt in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with my order of Bromophenol Blue sodium salt?
Each order includes a Certificate of Analysis (CoA) and safety data sheet (SDS); additional documentation can be provided upon request.
Ready to order or need a custom pack?
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