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318736

Sigma-Aldrich

Bromocresol Purple solution

0.04 wt. % in H2O

Synonym(s):

5′,5′′-Dibromo-o-cresolsulfonephthalein sodium salt

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About This Item

Empirical Formula (Hill Notation):
C21H15Br2NaO5S
CAS Number:
62625-30-3
Molecular Weight:
562.20
MDL number:
MFCD00148896
UNSPSC Code:
12171500
PubChem Substance ID:
24859142
NACRES:
NA.47

form

liquid

Quality Level

200

concentration

0.04 wt. % in H2O

pH

5.2-6.8, yellow-green to purple

density

0.991 g/mL at 25 °C

λmax

590 nm

ε (extinction coefficient)

≥60000 at 584-590 nm in 10 mM NaOH

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

[Na+].Cc1cc(cc(Br)c1O)\C(=C2/C=C(C)C(=O)C(Br)=C2)c3ccccc3S([O-])(=O)=O

InChI

1S/C21H16Br2O5S.Na/c1-11-7-13(9-16(22)19(11)24)21(14-8-12(2)20(25)17(23)10-14)15-5-3-4-6-18(15)29(26,27)28-21;/h3-10,24-25H,1-2H3;/q;+1/p-1

InChI key

WNOIORUCCYNQPE-UHFFFAOYSA-M

Related Categories

General description

Bromocresol purple (BCP) is an organic dye and a pH indicator. It changes from yellow (pH 5.2) to purple (6.8). BCP reacts with ammonia to yield ammonium salt. Hence, it can be used as an ammonia sensing probe.

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Handbook of Acid-Base Indicators (2007)
Optical fiber ammonia sensing probes using reagent immobilized porous silica coating as transducers
Tao S, et al.
Sensors and Actuators B, Chemical, 115(1), 158-163 (2006)

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