Merck 103170 0025 Eriochrome Black T (C.i. 14645) indicator For Complexometry Acs,Reag. Ph Eur 25 GR.

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Description
Catalogue Number	103170
Replaces	EX0100-5; EX0100
Synonyms	Chrome black T, 2-Hydroxy-1-(1-hydroxy-2-naphthylazo)-6-nitronaphthalene-4-sulfonic acid sodium salt

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Product Information
CAS number	1787-61-7
EC number	217-250-3
Grade	ACS,Reag. Ph Eur
Hill Formula	C₂₀H₁₂N₃NaO₇S
Molar Mass	461.38 g/mol
HS Code	3212 90 90
Structure formula Image
Quality Level	MQ200

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Physicochemical Information
pH value	3.7 (10 g/l, H₂O, 20 °C)
Bulk density	400 - 600 kg/m3
Solubility	50 g/l

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Toxicological Information
LD 50 oral	LD50 Rat 17590 mg/kg

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Safety Information according to GHS
Hazard Pictogram(s)	\n\n
Hazard Statement(s)	H319: Causes serious eye irritation.\nH411: Toxic to aquatic life with long lasting effects.
Precautionary Statement(s)	P264: Wash skin thoroughly after handling.\nP273: Avoid release to the environment.\nP280: Wear eye protection/ face protection.\nP305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.\nP337 + P313: If eye irritation persists: Get medical advice/ attention.\nP391: Collect spillage.\nP501: Dispose of contents/ container to an approved waste disposal plant.
Signal Word	Warning
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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Safety Information
Categories of danger	irritant, dangerous for the environment

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Storage and Shipping Information
Storage	Store at +15°C to +25°C.

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Transport Information
Declaration (railroad and road) ADR, RID	UN 3077 , 9, III
Declaration (transport by air) IATA-DGR	UN 3077 , 9, III
Declaration (transport by sea) IMDG-Code	UN 3077 , 9, III, Marine Pollutant: P

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Specifications
Identity (UV/VIS-Spectrum)	passes test
Appearance	Black to dark brown-black fine powder, eventually with granular parts
Clarity of solution	passes test
Absorption maximum λmax. (buffer pH 10.0)	612 - 616 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.02 g/l; buffer pH 10.0; calc. on dried substance)	400 - 510
Loss on drying (110 °C)	≤ 7 %
Suitability as indicator (for complexometric titration, ACS)	passes test
Suitability as indicator (Reag. Ph Eur)	passes test