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1.03026

Bromothymol blue

Name: Bromothymol blue
Brand: MM

pH indicator, ACS, Reag. Ph Eur

Synonym(s):

Bromothymol blue, 3′,3′′-Dibromothymolsulfonphthalein, BTB

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About This Item

Empirical Formula (Hill Notation):

C₂₇H₂₈Br₂O₅S

CAS Number:

76-59-5

Molecular Weight:

624.38

UNSPSC Code:

12171502

EC Index Number:

200-971-2

NACRES:

NB.21

MDL number:

MFCD00005872

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Properties

Product Name

Bromothymol blue, indicator ACS,Reag. Ph Eur

grade

ACS reagent

Quality Level

200

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

SMILES string

[S]1(=O)(=O)OC(c4c1cccc4)(c3c(c(c(c(c3)C(C)C)O)Br)C)c2c(c(c(c(c2)C(C)C)O)Br)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

Description

Application

Novel pH-responsive indicator films based on bromothymol blue-anchored chitin for shrimp freshness monitoring: This study presents innovative pH-sensitive films that incorporate bromothymol blue into chitin, designed for tracking shrimp spoilage. The development and testing of these films in real-time scenarios offer a viable method for monitoring seafood freshness, ensuring quality control in food distribution chains (Yang et al., 2023).

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

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Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c