1.03023
Bromophenol red
pH indicator
Synonym(s):
Bromophenol red, 3′,3′′-Dibromophenolsulfonphthalein, BPR
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About This Item
Product Name
Bromophenol red, indicator
Quality Segment
form
solid
impurities
≤5% Water (Karl Fischer)
visual transition interval
4.7-6.3, yellow to purple
mp
230 °C (decomposition)
bulk density
770 kg/m3
Amax
435-440 nm (buffer pH 4.7), 574-577 nm (buffer pH 6.3)
storage temp.
2-30°C
SMILES string
[S]1(=O)(=O)OC(c4c1cccc4)(c3cc(c(cc3)O)Br)c2cc(c(cc2)O)Br
InChI
1S/C19H12Br2O5S/c20-14-9-11(5-7-16(14)22)19(12-6-8-17(23)15(21)10-12)13-3-1-2-4-18(13)27(24,25)26-19/h1-10,22-23H
InChI key
OYCLSQDXZMROJK-UHFFFAOYSA-N
Analysis Note
Transition range: pH 4.7 - pH 6.3 yellow to purple
Absorption maximum λ 1 (buffer pH 4.7): 435 - 440 nm
Absorption maximum λ 2 (buffer pH 6.3): 574 - 577 nm
Spec. Absorptivity A 1%/1cm (λ1max; 0.01 g/l; buffer pH 4.7; calculated on anhydrous substance): ≥ 380
Spec. Absorptivity A 1%/1cm (λ2max; 0.01 g/l; Puffer pH 6.3; calculated on anhydrous substance): ≥ 760
Water (according to Karl Fischer): ≤ 5 %
Storage Class
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
Certificates of Analysis (COA)
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