Merck 108175 0005 Thymolphthalein Indicator Acs 5 GR.

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Description
Catalogue Number	108175

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Product Information
CAS number	125-20-2
EC number	204-729-7
Grade	ACS,Reag. Ph Eur
Hill Formula	C₂₈H₃₀O₄
Molar Mass	430.54 g/mol
HS Code	2932 20 00
Structure formula Image
Quality Level	MQ200

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Physicochemical Information
Melting Point	251 - 253 °C
Bulk density	400 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
Appearance	White to almost white powder, eventually slightly yellowish.
Clarity of solution (1 g/l; ethanol)	passes test
Absorption maximum λmax. (buffer pH 10.5)	592 - 596 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.01 g/l; buffer pH 10.5; calculated on anhydrous substance)	800 - 900
Transition range	pH 9.0 - pH 10.5 colourless - blue
Transition range (according to ACS)	passes test
Transition interval (according Reag. Ph. Eur.)	passes test
Loss on drying (110 °C)	≤ 1 %