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114413

Sigma-Aldrich

Bromothymol Blue

ACS reagent, Dye content 95 %

Sinonimo/i:

3′,3″-Dibromothymolsulfonphthalein

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About This Item

Formula empirica (notazione di Hill):
C27H28Br2O5S
Numero CAS:
76-59-5
Peso molecolare:
624.38
Beilstein:
373934
Numero CE:
200-971-2
Numero MDL:
MFCD00005872
Codice UNSPSC:
12171500
ID PubChem:
24847171
NACRES:
NA.47

Grado

ACS reagent

Livello qualitativo

200

Forma fisica

powder

Composizione

Dye content, 95%

Colore

pink-purple

visual transition interval

6.0-7.6, yellow to blue(passes test)

Punto di fusione

200-202 °C ((392 - 396 °F) - lit.)
200-202 °C (lit.)

λmax

420 nm

ε (coefficiente d’estinzione)

≥17000 at 419-425 nm in methanol
≥8000 at 326-332 nm in methanol
≥9000 at 279-285 nm in methanol

Temperatura di conservazione

room temp

Stringa SMILE

CC(C)c1cc(c(C)c(Br)c1O)C2(OS(=O)(=O)c3ccccc23)c4cc(C(C)C)c(O)c(Br)c4C

InChI

1S/C27H28Br2O5S/c1-13(2)17-11-20(15(5)23(28)25(17)30)27(19-9-7-8-10-22(19)35(32,33)34-27)21-12-18(14(3)4)26(31)24(29)16(21)6/h7-14,30-31H,1-6H3
NUHCTOLBWMJMLX-UHFFFAOYSA-N

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Descrizione generale

Bromothymol Blue, also known as, dibromothymolsulfonphthalein is a sulfonated hydroxyquinone in acidic aqueous solutions. In alkaline solutions, this dye is present as a moderately sized dianion. It is also known as bromthymol blue and dibromothymolsulfonphthalein. It is a pH-sensitive dye that changes color from yellow to blue.

Applicazioni

Bromothymol blue dye serves as a pH indicator because of the precise color transition at neutrality. Other applications include:
  • as a vital stain to trace the movement of fluids from the lymph and to define cell walls or nuclei under the microscope
  • for the demonstration of fungal hyphae within plant roots
  • in the assessment of the soluble acidity within single rice grains
  • use in an agar gel medium for enumeration of Bacillus cereus
  • as a component of several bacterial growth and detection substrates such as cystine lactose electrolyte deficient (CLED/BROLACIN); polymyxin pyruvate egg yolk mannitol bromothymol blue (PEMBA) and MacConkey agar.

Codice della classe di stoccaggio

11 - Combustible Solids

Classe di pericolosità dell'acqua (WGK)

WGK 3

Punto d’infiammabilità (°F)

Not applicable

Punto d’infiammabilità (°C)

Not applicable

Dispositivi di protezione individuale

Eyeshields, Gloves, type N95 (US)

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Certificati d'analisi (COA)

Lot/Batch Number
0000352443
0000352443
SHBQ9942
0000293123
0000234446

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To transform from reactive to proactive healthcare, there is an increasing need for low-cost and portable assays to continuously perform health measurements. The paper-based analytical devices could be a potential fit for this need. To miniaturize the multiplex paper-based microfluidic
Andrea Pastore et al.
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A pH colorimetric sensor array (CSA) with fast response time (<1 min) using only one acid-base indicator, Bromothymol Blue (BB), was prepared and characterized by modulating the amount, C, of the surfactant Hexadecyltrimethylammonium p-toluenesulfonate between 0 and 0.3725 gCTApTs/gprecursor with a
Mariana A Sanchez et al.
Analytica chimica acta, 694(1-2), 95-99 (2011-05-14)
Liquid-liquid microextraction without phase segmentation was implemented in a multicommuted flow system for determination of the anti-hypertensive diltiazem. The procedure was based on ion pair formation between the drug and the dye bromothymol blue at pH 3.5. The detection was
Bambang Kuswandi et al.
Talanta, 74(4), 613-618 (2008-03-29)
An optical fiber biosensor consisting of acetylcholinesterase (AChE) and bromothymol blue (BTB) doped sol-gel film was employed to detect organophosphate pesticide chlorpyrifos. The main advantage of this optical biosensor is the use of a single sol-gel film with immobilized AChE
Kristina Jurcic et al.
Journal of chromatography. A, 1134(1-2), 317-325 (2006-10-07)
An effective sample preconcentration technique for proteins and peptides was recently developed using capillary electrophoresis (CE) with discontinuous buffers [C.A. Nesbitt, J.T.-M. Lo, K.K.-C. Yeung, J. Chromatogr. A 1073 (2005) 175]. Two buffers of different pH created a junction to
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