Merck
All Photos(1)

1.03025

Supelco

Bromocresol purple

indicator ACS,Reag. Ph Eur

Synonym(s):
Bromocresol purple, 5′,5′′-Dibromo-o-cresolsulfonphthalein
Empirical Formula (Hill Notation):
C21H16Br2O5S
CAS Number:
Molecular Weight:
540.22
MDL number:
EC Index Number:
204-087-8

Quality Level

grade

ACS reagent

Agency

reag. Ph. Eur.

form

solid

loss

≤1% loss on drying, 110°C

visual transition interval

5.2-6.8, greenish yellow to blue-violet

mp

242 °C

bulk density

515 kg/m3

storage temp.

2-30°C

InChI

1S/C21H16Br2O5S/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

InChI key

ABIUHPWEYMSGSR-UHFFFAOYSA-N

Analysis Note

Transition range: pH 5.2 - pH 6.8greenish yellow - blue violet
Appearance of solution: passes test
Loss on drying (110 °C): ≤ 1
Transition range (according to ACS): passes test
Sensitivity test: passes test

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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