Bromothymol Blue -500g
Bromothymol Blue is a versatile pH indicator and dye widely used in laboratory, analytical, and educational applications to monitor pH changes in solutions.
Chemical Name
3,3′-Dimethyl-4,4′-dihydroxy-5,5′-dibromophenolsulfonephthalein
Synonyms
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BTB
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Bromothymolblau
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3,3′-Dimethyl-5,5′-dibromo-p-sulfophthalein
CAS Number
76-59-5
Appearance
Dark greenish-blue crystalline powder
Key Properties
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Molecular Formula: C₂₇H₂₈Br₂O₅S
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Molar Mass: ~624.38 g/mol
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pH Transition Range: 6.0 – 7.6
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Color Change: Yellow (acidic) → Green (neutral) → Blue (alkaline)
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Solubility: Slightly soluble in water; soluble in ethanol and methanol
Uses
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pH indicator in acid–base titrations and experiments
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Monitoring photosynthesis and respiration in aquatic plants
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Buffer solution preparation
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Educational demonstrations in chemistry and biology labs
Storage
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Store in a cool, dry, and dark place
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Keep container tightly closed
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Protect from light and moisture
Safety & Handling (SDS Summary)
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Use only in laboratory settings
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Avoid inhalation, ingestion, or contact with skin/eyes
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Wear appropriate PPE (gloves, goggles, lab coat)
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Wash hands thoroughly after handling
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Dispose of according to local regulations
| Weight | 1 kg |
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