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103026 Bromothymol blue

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Key Spec Table

CAS #EC NumberHill FormulaMolar MassGrade Value
76-59-5200-971-2C₂₇H₂₈Br₂O₅S624.40 g/molACS,Reag. Ph Eur


Catalogue NumberPackaging Qty/Pack
1030260005 Glass bottle 5 g
1030260025 Glass bottle 25 g
Catalogue Number103026
Synonyms3',3''-Dibromothymolsulfonphthalein, BTB
Product Information
CAS number76-59-5
EC number200-971-2
GradeACS,Reag. Ph Eur
Hill FormulaC₂₇H₂₈Br₂O₅S
Molar Mass624.40 g/mol
HS Code2934 99 99
Structure formula ImageStructure formula Image
Quality LevelMQ200
Biological Information
Physicochemical Information
Melting Point201 °C
Bulk density450 kg/m3
Materials Information
Toxicological Information
Safety Information according to GHS
Storage class10 - 13 Other liquids and solids
WGKWGK 3 highly hazardous to water
Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.
Safety Information
Product Usage Statements
Storage and Shipping Information
StorageStore at +2°C to +30°C.
Packaging Information
Transport Information
Supplemental Information
Identity (UV/VIS-Spectrum)passes test
Clarity of solution (1 g/l; ethanol)passes test
Transition rangepH 5.8 - pH 7.6 yellow - blue
Absorption maximum λ 1 max. (buffer pH 5.8)430 - 435 nm
Absorption maximum λ 2 max. (buffer pH 7.6)615 - 618 nm
Spec. Absorptivity A 1%/1cm (λ 1 max.; 0.005 g/l; buffer pH 5.8; calc. on dried substances)260 - 305
Spec. Absorptivity A 1%/1cm (λ 2 max.; 0.005 g/l; buffer pH 7.6; calc. on dried substances)455 - 530
Loss on drying (110 °C)≤ 3 %
Transition range (according to ACS)passes test
Sensitivity testpasses test
Global Trade Item Number
Catalogue Number GTIN
1030260005 04022536039015
1030260025 04022536039022