Merck 108121 0005 Bromocresol Green indicator Ph 3,8 - 5,4 Acs 5 GR.

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Description
Catalogue Number	108121
Synonyms	3,3',5,5'-Tetrabromo-m-cresolsulfonphthalein, BCG

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Product Information
CAS number	76-60-8
EC number	200-972-8
Grade	ACS,Reag. Ph Eur
Hill Formula	C₂₁H₁₄Br₄O₅S
Molar Mass	698.04 g/mol
HS Code	2934 99 90
Structure formula Image
Quality Level	MQ200

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Physicochemical Information
Melting Point	217 - 218 °C
Bulk density	350 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	NoTempLimit

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Specifications
Identity (UV/VIS-Spectrum)	passes test
Clarity of solution (1 g/l; ethanol)	passes test
Transition range	pH 3.8 - pH 5.4 yellowish green - blue
Absorptions maximum λ 1 max. (buffer pH 3.8)	438 - 445 nm
Absorptions maximum λ 2 max. (buffer pH 5.4)	615 - 618 nm
Spec. Absorptivity A 1%/1cm (λ 1 max.; 0.01 g/l; buffer pH 3.8; calc. on dried substances)	220 - 280
Spec. Absorptivity A 1%/1cm (λ 2 max.; 0.01 g/l; buffer pH 5.4; calc. on dried substances)	460 - 590
Loss on drying (110 °C)	≤ 3 %
Transition range (according to ACS)	passes test
Transition interval (according Reag. Ph Eur)	pH 3.6 - pH 5.2 yellow - blue
Sensitivity test	passes test