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

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

Safety Information according to GHS
Storage class	10 – 13 Other liquids and solids
WGK	WGK 2 obviously hazardous to water
Disposal	3 Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.

Safety Information
Categories of danger	dangerous for the environment

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

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

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(λ_max.; 0.00335 g/l; buffer pH 4.5;calc. on dried substances)	1350 – 1500
Spec. Absorptivity A 1%/1cm (λ_max; 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 %

Merck 106076 0025 Methyl Red (C.i. 13020) indicator Acs,Reag. Ph Eur 25 GR.