Eriochrome Black T
- Product Name
- Eriochrome Black T
- CAS No.
- 1787-61-7
- Chemical Name
- Eriochrome Black T
- Synonyms
- BT;EBT;CHROME BLACK T;ERICHROME BLACK T;ERIOCHROME BLACK;MORDANT BLACK 11;NBC2;NBC3;SBC2;F-241
- CBNumber
- CB5457454
- Molecular Formula
- C20H12N3NaO7S
- Formula Weight
- 461.38
- MOL File
- 1787-61-7.mol
Eriochrome Black T Property
- Density
- 1.109 g/mL at 25 °C
- Flash point:
- 185 °C
- storage temp.
- room temp
- solubility
- 50g/l
- form
- Powder/Solid
- pka
- pK1:6.3;pK2:11.55 (25°C)
- Colour Index
- 14645
- Specific Gravity
- 1.109
- color
- Brownish-black to black
- PH
- 3.7 (10g/l, H2O, 20℃)
- Odor
- Odorless
- Water Solubility
- 50 g/L (20 ºC)
- Merck
- 14,3667
- BRN
- 4121162
- Stability:
- Stable. Incompatible with strong oxidizing agents, strong reducing agents.
- CAS DataBase Reference
- 1787-61-7(CAS DataBase Reference)
- EPA Substance Registry System
- C.I. Mordant Black 11, monosodium salt (1787-61-7)
Safety
- Hazard Codes
- Xi
- Risk Statements
- 36-36/37/38-36/38
- Safety Statements
- 39-26-37/39-24/25
- RIDADR
- 3077
- WGK Germany
- 2
- RTECS
- QK2197000
- TSCA
- Yes
- HazardClass
- 6.1
- PackingGroup
- III
- HS Code
- 32041900
- Toxicity
- LD50 oral in rat: 17590mg/kg
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Danger
- Hazard statements
-
H411Toxic to aquatic life with long lasting effects
- Precautionary statements
-
P273Avoid release to the environment.
P391Collect spillage. Hazardous to the aquatic environment
P501Dispose of contents/container to..…
N-Bromosuccinimide Price
- Product number
- 858390
- Product name
- Eriochrome? Black T
- Purity
- ACS reagent (indicator grade)
- Packaging
- 100g
- Price
- $33.4
- Updated
- 2024/03/01
- Product number
- 858390
- Product name
- Eriochrome? Black T
- Purity
- ACS reagent (indicator grade)
- Packaging
- 1kg
- Price
- $218
- Updated
- 2024/03/01
- Product number
- 1.03170
- Product name
- Eriochrome black T (C.I. 14645)
- Purity
- indicator for complexometry ACS,Reag. Ph Eur
- Packaging
- 25G
- Price
- $67.2
- Updated
- 2024/03/01
- Product number
- 1.03170
- Product name
- Eriochrome black T (C.I. 14645)
- Purity
- indicator for complexometry ACS,Reag. Ph Eur
- Packaging
- 100G
- Price
- $235
- Updated
- 2024/03/01
- Product number
- E0020
- Product name
- Eriochrome Black T Complex
- Packaging
- 25g
- Price
- $58
- Updated
- 2021/12/16
Eriochrome Black T Chemical Properties,Usage,Production
Chemical Properties
black powder
Uses
Eriochrome black T is used as an indicator in analytical chemistry. It is also used in the detection of rare earth metals. It finds application in dyeing and printing of wool fabric, dyeing of silk and nylon as well as in leather dyeing. It can be used in the spectrophotometric determination of diphenhydramine hydrochloride in pharmaceutical preparations. As a complexometric indicator, it is useful in the determination of hardness of water.
Uses
Eriochrome? Black T has been used to determine the concentration of Ca2+ using complexometric titration method.
Uses
To 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.
Preparation
4-Amino-3-hydroxy-7-nitronaphthalene-1-sulfonic acid diazotization, and Naphthalen-1-ol?coupling.
General Description
Eriochrome? Black T is used as an indicator for complexometric titrations. It functions as an acid-base indicator. Eriochrome? Black T forms complex with Ca2+ and Mg2+, but it binds more strongly to Mg2+ ions.
Properties and Applications
blue black. Dark brown powder. Soluble in water for bordeaux red to jam red, moderate soluble in ethanol for brown light magenta, slightly soluble in Acetone. Dye in concentrated sulfuric acid for skipper, dilution to pale red light brown; In concentrated nitric acid to orange. Dye aqueous solution to join concentrated hydrochloric acid for sauce red; Join strong caustic into brown light magenta. Mainly used for all kinds of wool fabric dyeing, also used for silk, nylon and wool and a variety of fiber blended fabric dyeing, can be in chrome pretreatment of wool fabric direct printing. Is tasted can be used for indicator, also can be used for biological and fur dyeing.
| Standard | Ironing Fastness | Light Fastness | Fulling | Persperation Fastness | Soaping | Water | |
| Alkali | Acid | ||||||
| ISO | 4-5 | 7 | 5 | 5 | 5 | 5 | 5 |
| AATCC | 4-5 | 7 | 4-5 | 5 | 5 | 5 | |
Purification Methods
The 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
Raw materials
Preparation Products
Eriochrome Black T Suppliers
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View Lastest Price from Eriochrome Black T manufacturers
- Product
- Eriochrome Black T 1787-61-7
- Price
- US $0.00/KG
- Min. Order
- 10KG
- Purity
- 98%min
- Supply Ability
- 300KG/month
- Release date
- 2023-01-10
- Product
- Eriochrome Black T 1787-61-7
- Price
- US $10.00-7.00/kg
- Min. Order
- 1kg
- Purity
- 99.99%
- Supply Ability
- 10 tons
- Release date
- 2024-06-13
- Product
- Eriochrome Black T 1787-61-7
- Price
- US $15.00-10.00/KG
- Min. Order
- 1KG
- Purity
- 99%+ HPLC
- Supply Ability
- Monthly supply of 1 ton
- Release date
- 2021-07-11