Merck 104595 0005 Calconcarboxylic Acid Metal (Pm) indicator 5 GR.

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Description
Catalogue Number	104595
Synonyms	Patton and Reeders Reagent, 2-Hydroxy-1-(2-hydroxy-4-sulfo-1-naphthylazo)-naphthalene-3-carboxylic acid

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Product Information
CAS number	3737-95-9
EC number	223-117-0
Hill Formula	C₂₁H₁₄N₂O₇S * 2 H₂O
Molar Mass	474.45 g/mol
HS Code	2927 00 00
Structure formula Image
Quality Level	MQ200

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Physicochemical Information
Melting Point	300 °C
Bulk density	400 kg/m3
Solubility	8 g/l

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Safety Information according to GHS
Hazard Pictogram(s)	\n
Hazard Statement(s)	H315: Causes skin irritation.\nH319: Causes serious eye irritation.\nH335: May cause respiratory irritation.
Precautionary Statement(s)	P261: Avoid breathing dust.\nP264: Wash skin thoroughly after handling.\nP271: Use only outdoors or in a well-ventilated area.\nP280: Wear protective gloves/ eye protection/ face protection.\nP302 + P352: IF ON SKIN: Wash with plenty of water.\nP305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Signal Word	Warning
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 +5°C to +30°C.

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Specifications
Identity (UV/VIS-Spectrum)	passes test
Appearance of solution (0.1 g/l; ethanol)	passes test
Absorption maximum λmax. (Ethanol)	569 - 572 nm
Spec. Absorptivity A 1%/1cm (λmax.; 0.025 g/l; ethanol; calc. on water free substance)	≥ 250
Water (according to Karl Fischer)	≤ 9 %
Suitability as indicator (for metal titration)	passes test

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