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Sigma-Aldrich

Bromocresol Green/Methyl Red, mixed indicator solution

in methanol

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Synonym(s):
Tetrabromocresolsulfonphthalein
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.47

form

liquid

Quality Level

composition

Bromocresol Green, 0.1%
Methyl Red, 0.02%

concentration

in methanol

density

0.839 g/mL at 25 °C

λmax

434 nm

ε (extinction coefficient)

≥10000 at 282-288 nm in methanol
≥20000 at 509-519 nm in methanol
≥7000 at 329-335 nm in methanol

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

CN(C)c1ccc(cc1)\N=N\c2ccccc2C(O)=O.Cc3c(Br)c(O)c(Br)cc3C4(OS(=O)(=O)c5ccccc45)c6cc(Br)c(O)c(Br)c6C

InChI

1S/C21H14Br4O5S.C15H15N3O2/c1-9-12(7-14(22)19(26)17(9)24)21(13-8-15(23)20(27)18(25)10(13)2)11-5-3-4-6-16(11)31(28,29)30-21;1-18(2)12-9-7-11(8-10-12)16-17-14-6-4-3-5-13(14)15(19)20/h3-8,26-27H,1-2H3;3-10H,1-2H3,(H,19,20)/b;17-16+

InChI key

MFUUASJGLBWWPF-ZYSYNQLUSA-N

Related Categories

General description

Mixed indicator solutions of bromocresol green (pk 4.9) and methyl red (pk 5) give a red color in acidic conditions and green color in basic conditions with a sharp transition through grey color at pH 5.1 as the two colors are complementary.

Application

Suitable for titration of morpholine

signalword

Danger

Hazard Classifications

Acute Tox. 3 Dermal - Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Flam. Liq. 2 - STOT SE 1

Storage Class

3 - Flammable liquids

wgk_germany

WGK 2

flash_point_f

51.8 °F - closed cup

flash_point_c

11.0 °C - closed cup


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