|Synonyms||Chrome black T, 2-Hydroxy-1-(1-hydroxy-2-naphthylazo)-6-nitronaphthalene-4-sulfonic acid sodium salt|
|Grade||ACS,Reag. Ph Eur|
|Molar Mass||461.38 g/mol|
|HS Code||3212 90 00|
|Structure formula Image|
|pH value||3.7 (10 g/l, H₂O, 20 °C)|
|Bulk density||400 – 600 kg/m3|
|LD 50 oral||LD50 Rat 17590 mg/kg|
|Safety Information according to GHS|
|Hazard Statement(s)||H319: Causes serious eye irritation.
H411: Toxic to aquatic life with long lasting effects.
|Precautionary Statement(s)||P273: Avoid release to the environment.
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
|Storage class||10 – 13 Other liquids and solids|
|WGK||WGK 2 obviously hazardous to water|
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.
|Hazard Symbols||Dangerous for the environment
|Categories of danger||irritant, dangerous for the environment|
|R Phrase||R 36-51/53
Irritating to eyes.Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
|S Phrase||S 26-61
In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Avoid release to the environment. Refer to special instructions/ Safety data sheets.
|Storage and Shipping Information|
|Storage||Store at +15°C to +25°C.|
|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|
|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|