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Eriochrome black T (C.I. 14645)

Indicator for complexometry
ACS,Reag. Ph Eur.
CAS 1787-61-7
pH 3.7 (10 g/l, H₂O, 20 °C)
Code: 1031700025
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Indicator for complexometry ACS,Reag. Ph Eur. CAS 1787-61-7 pH 3.7 (10 g/l, H₂O, 20 °C)
Replacement Information
Replacement Information In North America 1.03170.0100 replaces and is identical to EX0100-5
 

Key Spec Table

CAS #EC NumberHill FormulaMolar MassGrade Value
1787-61-7 217-250-3 C₂₀H₁₂N₃NaO₇S 461.38 g/mol ACS,Reag. Ph Eur
Description
Catalogue Number 103170
Replaces EX0100-5; EX0100
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 3204 19 00
Structure formula Image
Applications
Application Eriochrome black T (C.I. 14645) indicator for complexometry ACS,Reag. Ph Eur. CAS 1787-61-7, pH 3.7 (10 g/l, H₂O, 20 °C). MSDS and product info below.
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 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 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
Hazard Symbols Irritant
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.
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
Specifications
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
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