Merck 106161 0005 Murexide (Ammonium Purpurate) Metal indicator Acs,Reag. Ph Eur 5 GR.

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Description
Catalogue Number	106161
Replaces	MX1665-3; MX1665
Synonyms	Ammonium purpurate, acid

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Product Information
CAS number	3051-09-0
EC number	221-266-6
Grade	ACS
Hill Formula	C₈H₈N₆O₆
Molar Mass	284.19 g/mol
HS Code	2933 54 00
Structure formula Image
Quality Level	MQ200

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Physicochemical Information
Melting Point	300 °C
pH value	5 (1 g/l, H₂O, 20 °C)
Bulk density	330 kg/m3
Solubility	1 g/l

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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 (IR-spectrum)	passes test
Identity (UV/VIS-Spectrum)	passes test
Absorption maximum (water)	520 - 524 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.01 g/l; water)	≥ 300
Sulfated ash (800 °C)	≤ 1.0 %
Loss on Drying (105 °C)	≤ 2.0 %
Suitability as indicator (for metal titration)	passes test