Merck
All Photos(1)

1.03026

Supelco

Bromothymol blue

indicator ACS,Reag. Ph Eur

Synonym(s):
Bromothymol blue, 3′,3′′-Dibromothymolsulfonphthalein, BTB
Empirical Formula (Hill Notation):
C27H28Br2O5S
CAS Number:
Molecular Weight:
624.38
MDL number:
EC Index Number:
200-971-2

Quality Level

grade

ACS reagent

Agency

reag. Ph. Eur.

form

solid

loss

≤3% loss on drying, 110°C

visual transition interval

5.8-7.6, yellow to blue

bulk density

450 kg/m3

storage temp.

2-30°C

InChI

1S/C27H28Br2O5S/c1-13(2)17-11-20(15(5)23(28)25(17)30)27(19-9-7-8-10-22(19)35(32,33)34-27)21-12-18(14(3)4)26(31)24(29)16(21)6/h7-14,30-31H,1-6H3

InChI key

NUHCTOLBWMJMLX-UHFFFAOYSA-N

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Analysis Note

Transition range: pH 5.8 - pH 7.6yellow - blue
Appearance of solution: passes test
Loss on drying (110 °C): ≤ 3
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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