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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 |
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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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