Molekula
Bromothymol 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
Bromothymol Blue sodium salt is a synthetic pH indicator dye used in laboratory and industrial applications to detect acidity or alkalinity in solutions, changing color from yellow (acidic) to blue (basic). It is widely employed in titrations, biological buffers, and environmental testing for precise pH monitoring. This chemical has a CAS number of 34722-90-2, with the molecular formula C27H27Br2NaO5S and a molecular weight of 646.36. It is stored at ambient conditions and carries no signal word for hazard classification. Molekula supplies Bromothymol 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 — £109.10 per pack ex VAT · £130.92 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | Powder |
| Loss on Drying | ≤5% |
| Wavelength of maximum absorption (0.1N NaOH) | 613-619 |
| pH Transition - Colour Change | pH 5.8 (yellow) - pH7.6 (blue) |
| Specific absorption (E 1%/1cm) at λ max | ≥540 |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
Identification
| Property | Value |
|---|---|
| SKU | 90027176 |
| CAS Number | 34722-90-2 |
| IUPAC Name | sodium 2-[(Z)-(3-bromo-4-hydroxy-2-methyl-5-propan-2-ylphenyl)-(3-bromo-2-methyl-4-oxo-5-propan-2-ylcyclohexa-2,5-dien-1-ylidene)methyl]benzenesulfonate |
| Molecular Formula | C27H27Br2NaO5S |
| Molecular Weight | 646.36 |
| Exact Mass | 645.9823 |
| SMILES | CC1=C(C=C(C(=C1Br)O)C(C)C)/C(=C/2\C=C(C(=O)C(=C2C)Br)C(C)C)/C3=CC=CC=C3S(=O)(=O)[O-].[Na+] |
| InChIKey | NMKFVGALBGZKGW-FKWCIMQXSA-M |
| InChI | InChI=1S/C27H28Br2O5S.Na/c1-13(2)18-11-20(15(5)24(28)26(18)30)23(17-9-7-8-10-22(17)35(32,33)34)21-12-19(14(3)4)27(31)25(29)16(21)6;/h7-14,30H,1-6H3,(H,32,33,34);/q;+1/p-1/b23-21+; |
| PubChem CID | 22489401 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 29147940 |
| 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
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
- Bromthymol Blue sodium
- Bromthymolblau Natriumsalz
- Sodium bromothymol blue
Frequently asked questions
What is Bromothymol Blue sodium salt commonly used for?
Bromothymol Blue sodium salt is primarily used as a pH indicator in laboratories, transitioning from yellow to blue between pH 6.0 and 7.6, and in biological staining applications.
What is the chemical formula and molecular weight of Bromothymol Blue sodium salt?
The chemical formula is **C₂₇H₂₇Br₂NaO₅S**, and the molecular weight is **646.36 g/mol**.
How should Bromothymol Blue sodium salt be stored?
Store at **ambient temperature** in a tightly sealed container, away from moisture and direct light.
What grade or purity is available for Bromothymol Blue sodium salt from Molekula?
Molekula supplies **analytical grade** Bromothymol Blue sodium salt, meeting high-purity standards for research and laboratory use.
Can Molekula supply Bromothymol Blue sodium salt in bulk quantities?
Yes, Molekula can provide bulk quantities of Bromothymol Blue sodium salt upon request, subject to availability and order specifications.
What documentation comes with an order of Bromothymol Blue sodium salt?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and batch-specific documentation for traceability.
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.