Merck 103025 0025 Bromocresol Purple indicator 25 GR.

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Description
Catalogue Number	103025
Synonyms	5',5''-Dibromo-o-cresolsulfonphthalein

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Product Information
CAS number	115-40-2
EC number	204-087-8
Grade	ACS,Reag. Ph Eur
Hill Formula	C₂₁H₁₆Br₂O₅S
Molar Mass	540.24 g/mol
HS Code	2934 99 99
Structure formula Image
Quality Level	MQ200

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Physicochemical Information
Melting Point	242 °C
Bulk density	515 kg/m3

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Safety Information according to GHS
Storage class	10 - 13 Other liquids and solids
WGK	WGK 3 highly hazardous to water
Disposal	3\nRelatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.

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Storage and Shipping Information
Storage	Store at +2°C to +30°C.

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Specifications
Identity (UV/VIS-Spectrum)	passes test
Clarity of solution (1 g/l; ethanol)	passes test
Transition range	pH 5.2 - pH 6.8 greenish yellow - blue violet
Absorption maximum λ 1 max. (buffer pH 5.2)	429 - 433 nm
Absorption maximum λ 2 max. (buffer pH 6.8)	587 - 590 nm
Spec. Absorptivity A 1%/1cm (λ 1 max.; 0.005 g/l; buffer pH 5.2; calc. on dried substances)	400 - 470
Spec. Absorptivity A 1%/1cm (λ 2 max.; 0.005 g/l; buffer pH 6.8; calc. on dried substances)	1000 - 1160
Loss on drying (110 °C)	≤ 2 %
Transition range (according to ACS)	passes test
Sensitivity test	passes test