Merck 106202 0005 Naphtolbenzein Indicator 5 GR.

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Description
Catalogue Number	106202

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Product Information
CAS number	145-50-6
EC number	205-656-3
Grade	Reag. Ph Eur
Hill Formula	C₂₇H₁₈O₂
Molar Mass	374.43 g/mol
HS Code	2914 50 90
Structure formula Image
Quality Level	MQ200

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Physicochemical Information
Melting Point	243 - 245 °C
Bulk density	120 - 300 kg/m3

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Safety Information according to GHS
Hazard Statement(s)	H413: May cause long lasting harmful effects to aquatic life.
Precautionary Statement(s)	P273: Avoid release to the environment.\nP501: Dispose of contents/ container to an approved waste disposal plant.
Storage class	10 - 13 Other liquids and solids
WGK	WGK 2 obviously 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 (IR-spectrum)	passes test
Identity (UV/VIS-Spectrum)	passes test
Absorption maximum λmax. (perchloric acid (0,1 mol/l) in acetic acid)	622 - 626 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.005 g/l; perchloric acid (0,1 mol/l) in acetic acid; calculated on dried substance)	640 - 950
Transition range	pH 8,0 - pH 9,6; apricot - turquoiseblue
Loss on Drying (105°C)	≤ 7 %
Suitability as indicator (for non-aqueous titration)	passes test