Merck 106076 0100 Methyl Red (C.i. 13020) indicator Acs 100 GR.

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Description
Catalogue Number	106076
Synonyms	4-Dimethylaminoazobenzene-2'-carboxylic acid

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Product Information
CAS number	493-52-7
EC number	207-776-1
Grade	ACS,Reag. Ph Eur
Hill Formula	C₁₅H₁₅N₃O₂
Molar Mass	269.31 g/mol
HS Code	2927 00 00
Structure formula Image
Quality Level	MQ200

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Physicochemical Information
Melting Point	179 - 182 °C
Bulk density	300 - 500 kg/m3

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Safety Information according to GHS
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	dangerous for the environment

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Storage and Shipping Information
Storage	Store at +2°C to +30°C.

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Transport Information
Declaration (railroad and road) ADR, RID	Kein Gefahrgut
Declaration (transport by air) IATA-DGR	No Dangerous Good
Declaration (transport by sea) IMDG-Code	No Dangerous Good

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Specifications
Identity (UV/VIS-Spectrum)	passes test
Appearance	Red to red-violet powder, eventually with granular parts.
Clarity of solution (1 g/l; ethanol)	passes test
Melting point (capillary method, temperatur measerment in the heating block)	179 - 182 °C
Transition range	pH 4.4 - pH 6.0 Red - yellow
Absorption maximum (buffer pH 4.5)	523 - 526 nm
Absorption maximum (buffer pH 6.2)	427 - 437 nm
Spec. Absorptivity A 1%/1cm(λmax.; 0.00335 g/l; buffer pH 4.5;calc. on dried substances)	1350 - 1500
Spec. Absorptivity A 1%/1cm (λmax; 0.005 g/l; buffer pH 6.2; calculated on anhydrous substance)	700 - 800
Transition range (according to ACS)	passes test
Loss on drying (110 °C)	≤ 5 %