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Eriochrome Black T

Eriochrome Black T Suppliers list
Company Name: Mainchem Co., Ltd.
Tel: +86-0592-6210733
Products Intro: Product Name:Eriochrome Black T
Company Name: career henan chemical co
Tel: +86-371-86658258
Products Intro: Product Name:Eriochrome Black T
Purity:99% Package:1kg;8USD
Company Name: J & K SCIENTIFIC LTD.  
Tel: 400-666-7788 +86-10-82848833
Products Intro: Product Name:Black T, indicator
Company Name: Meryer (Shanghai) Chemical Technology Co., Ltd.  
Tel: +86-(0)21-61259100(Shanghai) +86-(0)755-86170099(ShenZhen) +86-(0)10-62670440(Beijing)
Products Intro: Product Name:EriochroMe Black T
Purity:ind Package:100g;500g Remarks:F70006
Company Name: Alfa Aesar  
Tel: 400-610-6006; 021-67582000
Products Intro: Product Name:EriochroMe Black T
Package:100g Remarks:A17536

Lastest Price from Eriochrome Black T manufacturers

  • Eriochrome Black T
  • US $8.00 / kg
  • 2018-12-17
  • CAS:1787-61-7
  • Min. Order: 1kg
  • Purity: 99%
  • Supply Ability: 10MT
Eriochrome Black T Basic information
Product Name:Eriochrome Black T
Product Categories:Dyes and Pigments;Analytical Chemistry;Azo Compounds;Chelating Reagents;Naphthylazo Compounds
Mol File:1787-61-7.mol
Eriochrome Black T Structure
Eriochrome Black T Chemical Properties
density 1.109 g/mL at 25 °C
Fp 185 °C
storage temp. Store at RT.
solubility 50g/l
form Powder/Solid
Colour Index 14645
color Brownish-black to black
PH3.7 (10g/l, H2O, 20℃)
Water Solubility 50 g/L (20 ºC)
Merck 14,3667
BRN 4121162
Stability:Stable. Incompatible with strong oxidizing agents, strong reducing agents.
CAS DataBase Reference1787-61-7(CAS DataBase Reference)
EPA Substance Registry System1-Naphthalenesulfonic acid, 3-hydroxy-4-[(1-hydroxy-2- naphthalenyl)azo]-7-nitro-, monosodium salt(1787-61-7)
Safety Information
Hazard Codes Xi
Risk Statements 36-36/37/38-36/38
Safety Statements 39-26-37/39-24/25
WGK Germany 2
RTECS QK2197000
HazardClass 6.1
PackingGroup III
HS Code 32041900
MSDS Information
C.I. 14645 English
ACROS English
ALFA English
Eriochrome Black T Usage And Synthesis
Chemical Propertiesblack powder
UsesTo dye wool from an acid bath reddish-black, which can be converted to blue-black by afterchroming. As indicator in the determination of the total calcium and magnesium content of water.
Purification MethodsThe sodium salt (200g) is converted to the free acid by stirring with 500mL of 1.5M HCl, and, after several minutes, the slurry is filtered on a sintered-glass funnel. The process is repeated and the material is air dried after washing with acid. It is then extracted with *benzene for 12hours in a Soxhlet extractor, the *benzene solution is evaporated and the residue is air dried. A further desalting with 1.5M HCl (1L) is followed by crystallisation from dimethylformamide (in which it is very soluble) by forming a saturated solution at the boiling point, and allowing to cool slowly. The crystalline dimethylammonium salt so obtained is washed with *benzene and treated repeatedly with dilute HCl to give the insoluble free acid which, after air drying, is dissolved in alcohol, filtered and evaporated. The final material is air dried, then dried in a vacuum desiccator over Mg(ClO4)2. The purified acid is converted to the dimethylammonium salt with Me2NH. [Diehl & Lindstrom, Anal Chem 31 414 1959]. It is an indicator in the complexometry of alkaline earth metals. [Beilstein 16 IV 429.]
Eriochrome Black T Preparation Products And Raw materials
Preparation Productshigh tempreature leveler U-100
Raw materialsSodium hydroxide-->Hydrochloric acid-->Sulfuric acid -->1-Naphthol-->Quinoline-->2-Naphthol-->2-DIAZO-1-NAPHTHOL-4-SULFONIC ACID HYDRATE
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