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Description
Catalogue Number
104594
Synonyms
2-Hydroxy-1-(2-hydroxy-1-naphthylazo)naphthalene-4-sulfonic acid sodium salt
Product Information
CAS number
2538-85-4
EC number
219-810-2
Hill Formula
C20H13N2NaO5S
Molar Mass
416.39 g/mol
HS Code
2927 00 00
Physicochemical Information
pH value
9.4 (10 g/l, H2O, 25 °C)
Bulk density
530 kg/m3
Solubility
20 g/l
Safety Information according to GHS
Storage class
10 - 13 Other liquids and solids
WGK
WGK 2 water endangering
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.
Storage and Shipping Information
Storage
Store at +5°C to +30°C.
Specifications
Identity (UV/VIS-Spectrum)
passes test
Absorption maximum ?max. (buffer pH 12.2)
634 - 640 nm
Spec. Absorptivity A 1%/1cm (?max; 0.015 g/l; buffer pH?12.2; calculated on dried substance)
250 - 400
Loss on drying (110?°C)
= 10 %
Suitability as indicator (for metal titration)
