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 1999 · 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 in 25 g packs, from $207.20 excl. VAT. It is in stock for same-day dispatch. Every batch ships with a certificate of analysis, and safety data sheets are available in 5 languages. 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 — $207.20 per pack
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 | 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.
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
- 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 Bromothymol Blue sodium salt as a powder with a loss on drying of no more than 5%, a wavelength of maximum absorption of 613-619 nm in 0.1N NaOH, a specific absorption (E 1%/1cm) at λmax of at least 540, and a pH transition from yellow at pH 5.8 to blue at pH 7.6.
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.
Where can I buy Bromothymol Blue sodium salt?
Directly from Molekula, which lists Bromothymol Blue sodium salt in 25 g packs from $207.20 excl. 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.