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LC1906 Eriochrome black T (C.I. 14645)

indicator for complexometry

 

Order number Packaging Quantity Price €
AC28906 Glass bottle 25 g 21.6
AC28906 Glass bottle 100 g 27.9

 

Product information
Synonyms Chrome black T, 2-Hydroxy-1-(1-hydroxy-2-naphthylazo)-6-nitronaphthalene-4-sulfonic acid sodium salt
Hill Formula C20H12N3NaO7S
HS Code 3204 19 00
EC number 217-250-3
Molar mass 461.38 g/mol
CAS number 1787-61-7

 

Chemical and physical data
Solubility 50 g/l (20 °C)
Molar mass 461.38 g/mol
Bulk density 400 – 600 kg/m3
pH value 3.7 (10 g/l, H2O, 20 °C)

 

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.
Signal Word Warning
Hazard Pictogram(s)
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.

 

Safety information
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.
Categories of danger irritant, dangerous for the environment
Hazard Symbol

Irritant

Dangerous for the environment

 

Transport information
Declaration (transport by sea) IMDG-Code UN 3077 ENVIRONMENTALLY HAZARDOUS SUBSTANCE, SOLID, N.O.S.(2-HYDROXY-1-(1-HYDROXY-2-NAPHTHYLAZO)-6-NITRONAPHTHALENE-4-SULFON IC ACID SODIUM SALT), 9, III, Marine Pollutant: P
Declaration (transport by air) IATA-DGR UN 3077 ENVIRONMENTALLY HAZARDOUS SUBSTANCE, SOLID, N.O.S.(2-HYDROXY-1-(1-HYDROXY-2-NAPHTHYLAZO)-6-NITRONAPHTHALENE-4-SULFON IC ACID SODIUM SALT), 9, III

 

Toxicological data
LD 50 oral LD50 rat 17590 mg/kg

 

Specifications
Identity (UV/VIS-Spectrum) passes test
Appearance Dark brown to black-brown powder, eventually with granular parts.
Clarity of solution passes test
Absorption maximum λ max (buffer pH 10.0) 612 – 616 nm
Spec. Absorptivity A 1%/1cm (λ7m7ax; 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
– Reag. Ph. Eur. passes test

 

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