Molekula
Bromocresol Purple sodium salt
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Bromocresol Purple sodium salt is a synthetic pH indicator dye used in biochemical assays, titrations, and buffer preparations to detect pH changes between 5.2 and 6.8. It appears purple in alkaline solutions and yellow in acidic ones, making it ideal for analytical applications. Catalogue details: CAS 62625-30-3, molecular formula C21H15Br2O5S·Na, molecular weight 562.20 g/mol. Store at ambient conditions. Signal word: Warning.
Molekula supplies Bromocresol Purple sodium salt in 25 g packs, from £107.64 inc. VAT. It is in stock for same-day dispatch. Every batch ships with a certificate of analysis, and a safety data sheet is available. Larger quantities, up to multi-tonne, are quoted on request.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
In stock — same-day dispatch
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.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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25 g — £89.70 per pack ex VAT · £107.64 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Dark red/ brown powder |
| Loss on drying (110 °C) | (Max.) 5.00% |
| Solubility (0.1% water) | Clear Reddish Yellow Solution |
| pH Transition - Colour Change | pH5.2 (Yellow) - pH6.8 (Purple) |
| Wavelength of Maximum Absorption in 0.1N NaOH (λ max) | 586.0-592.0 nm |
| Specific absorption (E 1%/1cm) at λ max | (Min.) 870 |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
Identification
| Property | Value |
|---|---|
| SKU | 15321705 |
| CAS Number | 62625-30-3 |
| IUPAC Name | sodium 2-[(3-bromo-4-hydroxy-5-methylphenyl)-(3-bromo-5-methyl-4-oxocyclohexa-2,5-dien-1-ylidene)methyl]benzenesulfonate |
| Molecular Formula | C21H15Br2O5S·Na |
| Molecular Weight | 562.20 |
| Exact Mass | 561.8884 |
| SMILES | CC1=CC(=CC(=C1O)Br)C(=C2C=C(C(=O)C(=C2)Br)C)C3=CC=CC=C3S(=O)(=O)[O-].[Na+] |
| InChIKey | KVSJYIXUWNOWBD-UHFFFAOYSA-M |
| InChI | InChI=1S/C21H16Br2O5S.Na/c1-11-7-13(9-16(22)20(11)24)19(14-8-12(2)21(25)17(23)10-14)15-5-3-4-6-18(15)29(26,27)28;/h3-10,24H,1-2H3,(H,26,27,28);/q;+1/p-1 |
| PubChem CID | 3830446 |
| REACH Code | Y110 |
| Tariff Code | 29147900 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is Bromocresol Purple sodium salt commonly used for?
It is primarily used as a pH indicator in biochemical research, clinical diagnostics, and analytical chemistry for detecting pH changes in the range of 5.2–6.8.
What is the chemical formula and molecular weight of Bromocresol Purple sodium salt?
The formula is C₂₁H₁₅Br₂O₅S·Na, and its molecular weight is 562.20 g/mol.
How should Bromocresol Purple sodium salt be stored?
Store at ambient temperature in a tightly sealed container, away from moisture and direct sunlight.
What purity grade is available for Bromocresol Purple sodium salt?
No specific grade is stated. The product is supplied to a defined specification. It is a dark red/brown powder with a maximum loss on drying of 5.00% at 110 °C. A 0.1% solution in water is clear and reddish yellow. The colour changes from yellow at pH 5.2 to purple at pH 6.8. The maximum absorption in 0.1N NaOH is at 586.0–592.0 nm, with a minimum specific absorption (E 1%/1cm) of 870 at that wavelength.
Can Molekula supply Bromocresol Purple sodium salt in bulk quantities?
Yes, we offer bulk packaging options—please contact our sales team for custom quantities and pricing.
What documentation is provided with an order of Bromocresol Purple sodium salt?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and batch-specific documentation for traceability.
Where can I buy Bromocresol Purple sodium salt?
Directly from Molekula, which lists Bromocresol Purple sodium salt in 25 g packs from £107.64 inc. VAT, with a certificate of analysis for every batch. Larger quantities are quoted on request. Molekula's offices: United Kingdom, France, Spain, Germany, Italy, United States and China.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.