Date published: 2025-10-1

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Bromothymol Blue (CAS 76-59-5)

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Alternate Names:
BTB
Application:
Bromothymol Blue is a pH indicator for weak acids and bases
CAS Number:
76-59-5
Molecular Weight:
624.38
Molecular Formula:
C27H28Br2O5S
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

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a chemical indicator for weak acids and bases. The chemical is also used for observing photosynthetic activities or respiratory indicators (turns green then yellow as CO2 is added). ACS grade. Dye content 95% pK: 7.30 Approximate pH range for color change: 6.0-7.6 Color of acid form: yellow Color of base form: blue

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

Bromothymol Blue, 5 g

sc-206047
5 g
$37.00

Bromothymol Blue, 25 g

sc-206047A
25 g
$130.00