Eriochrome Black (C.I.14645)


SKU: N/A Category:


Synonyms Chrome black T, 2-Hydroxy-1-(1-hydroxy-2-naphthylazo)-6-nitronaphthalene-4-sulfonic acid sodium salt

Product Information
CAS number 1787-61-7
EC number 217-250-3
Grade ACS,Reag. Ph Eur
Hill Formula C₂₀H₁₂N₃NaO₇S
Molar Mass 461.38 g/mol
HS Code 3212 90 00
Structure formula Image Structure formula Image
Quality Level MQ200

Physicochemical Information
pH value 3.7 (10 g/l, H₂O, 20 °C)
Bulk density 400 – 600 kg/m3
Solubility 50 g/l

Toxicological Information
LD 50 oral LD50 Rat 17590 mg/kg

Safety Information according to GHS
Hazard Pictogram(s) Hazard Pictogram(s)
Hazard Pictogram(s)
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
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
Hazard Symbols Hazard SymbolsDangerous for the environment
Hazard SymbolsIrritant
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.

Transport Information
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


Additional information


25g, 100g


There are no reviews yet.

Be the first to review “Eriochrome Black (C.I.14645)”

Your email address will not be published. Required fields are marked *