Bromo thymol blue

Name: Bromo thymol blue
Brand: Vaqora Chemicals
SKU: VQ-000514

About Bromo thymol blue

Vaqora Chemicals supplies Bromo thymol blue in AR grade, a biological stain registered under CAS number 76-59-5. The compound has the formula C27H28Br2O5S, corresponding to a molecular weight of 624.4 g/mol. Common synonyms include 3′,3″-Dibromothymolsulfonphthalein and BTB.

The material typically appears as a pink to brown to purple powder. Reported physical data include a melting point of 200-202 °C. Keep the container tightly sealed and store it in a cool, dry area. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

Key uses span histology and cytology staining, microscopy, clinical laboratories and biological staining. Typical end-use sectors are academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

Available in 5 g, 25 g, 100 g and 500 g packs, Bromo thymol blue is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Biological staining

Industries

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Bromo thymol blue
Catalogue No.	VQ-000514
CAS Number	76-59-5
IUPAC name	2-bromo-4-[3-(3-bromo-4-hydroxy-2-methyl-5-propan-2-ylphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]-3-methyl-6-propan-2-ylphenol
Molecular formula	C₂₇H₂₈Br₂O₅S
Molecular weight	624.4 g/mol
Exact mass	624.0004
Grade	AR
HSN code	29349900
InChIKey	NUHCTOLBWMJMLX-UHFFFAOYSA-N
SMILES	CC1=C(C=C(C(=C1Br)O)C(C)C)C2(C3=CC=CC=C3S(=O)(=O)O2)C4=C(C(=C(C(=C4)C(C)C)O)Br)C
PubChem CID	6450

Physical properties
Physical form	Powder
Appearance	Pink to brown to purple powder
Melting point	200-202 °C
LogP (XLogP3)	7.6
H-bond donors / acceptors	2 / 5
TPSA	92.2 Å²
Synonyms	3′,3″-Dibromothymolsulfonphthalein, BTB, Bromothymol blue, Dibromothymolsulfophthalein, Dibromothymolsulfonphthalein, Thymol, 6,6'-(3H-2,1-benzoxathiol-3-ylidene)bis(2-bromo-, S,S-dioxide, Blue, Bromthymol, Blue, Bromothymol, Thymol, 6,6'-(3H-2,1-benzoxathiol-3-ylidene)bis[2-bromo-, S,S-dioxide, 3,3'-Dibromothymolsulfonphthalein, Bromothymol blue (sodium salt), 3',3''-Dibromothymolsulfonphthalein

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302Harmful if swallowed
H315Causes skin irritation
H319Causes serious eye irritation

Precautionary statements: P264, P264 + P265, P270, P280, P301 + P317, P302 + P352, P305 + P351 + P338, P321, P330, P332 + P317, P337 + P317, P362 + P364, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Other grades of CAS 76-59-5

Bromo thymol blue solution

CAS: 76-59-5
Formula: C₂₇H₂₈Br₂O₅S
MW: 624.4 g/mol

VQ-003520

AR / Molecular Biology

Bromo thymol blue, AR, for molecular biology

CAS: 76-59-5
Formula: C₂₇H₂₈Br₂O₅S
MW: 624.4 g/mol

VQ-046668

Molecular Biology

Bromo thymol blue, for molecular biology

CAS: 76-59-5
Formula: C₂₇H₂₈Br₂O₅S
MW: 624.4 g/mol

VQ-046152

Plant Culture

Bromo thymol blue, plant tissue culture tested

CAS: 76-59-5
Formula: C₂₇H₂₈Br₂O₅S
MW: 624.4 g/mol

VQ-045527

Frequently asked questions

What is the CAS number of Bromo thymol blue?

The CAS Registry Number of Bromo thymol blue is 76-59-5. It is also known as 3′,3″-Dibromothymolsulfonphthalein, BTB, Bromothymol blue.

What is the molecular formula and molecular weight of Bromo thymol blue?

Bromo thymol blue has the molecular formula C27H28Br2O5S and a molecular weight of 624.4 g/mol. Its IUPAC name is 2-bromo-4-[3-(3-bromo-4-hydroxy-2-methyl-5-propan-2-ylphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]-3-methyl-6-propan-2-ylphenol.

Which grade and pack sizes of Bromo thymol blue can I order?

We supply Bromo thymol blue in AR grade, in 5 g, 25 g, 100 g, 500 g, 5 kg, 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Bromo thymol blue?

Yes. Every lot of Bromo thymol blue is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Bromo thymol blue be shipped internationally?

Yes. Bromo thymol blue is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.