ChemicalBook > CAS DataBase List > Eriochrome Black T

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
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Eriochrome Black T Property

Density 
1.109 g/mL at 25 °C
bulk density
400-600kg/m3
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
color 
Brownish-black to black
Specific Gravity
1.109
Odor
Odorless
PH
3.7 (10g/l, H2O, 20℃)
Water Solubility 
50 g/L (20 ºC)
λmax
612-616 nm (buffer pH 10.0)
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)
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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
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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..…

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
858390
Product name
Eriochrome? Black T
Purity
ACS reagent (indicator grade)
Packaging
100g
Price
$33.4
Updated
2024/03/01
Sigma-Aldrich
Product number
858390
Product name
Eriochrome? Black T
Purity
ACS reagent (indicator grade)
Packaging
1kg
Price
$218
Updated
2024/03/01
Sigma-Aldrich
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
Sigma-Aldrich
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
TCI Chemical
Product number
E0020
Product name
Eriochrome Black T Complex
Packaging
25g
Price
$58
Updated
2021/12/16
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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

1-Naphthol Quinoline 2-DIAZO-1-NAPHTHOL-4-SULFONIC ACID HYDRATE Hydrochloric acid Sodium hydroxide dyeing 2-Naphthol Sulfuric acid

Preparation Products

high tempreature leveler U-100
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Eriochrome Black T Suppliers

Americas 1 Austria 1 Belgium 1 Brazil 1 Canada 2 China 294 Czech Republic 1 Europe 5 France 1 Germany 6 India 39 Japan 7 Mexico 1 South Korea 1 Switzerland 1 Ukraine 1 United Kingdom 7 United States 55 Global 425
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View Lastest Price from Eriochrome Black T manufacturers

WUHAN FORTUNA CHEMICAL CO., LTD
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
Shandong Deshang Chemical Co., Ltd.
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
Zhuozhou Wenxi import and Export Co., Ltd
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

1787-61-7, Eriochrome Black TRelated Search:

Mordant Red 19 Acid Black 26 CHLOROPHOSPHONAZO III Acid Black ATT Naphthalene Acid Black 2 Mordant Black 3 ACID BLACK 24 Mordant Black 17 4-Amino-benzenesulfonic acid monosodium salt 4-Aminothiophenol 1-Naphthalenesulfonic acid Nitrosobenzene NITROGEN DIOXIDE ERIOCHROME BLACK A 2-NAPHTHYLAMINE-8-SULFONIC ACID 2-NITRONAPHTHALENE Naphthionic acid

  • 1-naphthalenesulfonicacid,3-hydroxy-4-((1-hydroxy-2-naphthalenyl)azo)-7-nitro
  • 1-naphthalenesulfonicacid,3-hydroxy-4-[(1-hydroxy-2-naphthalenyl)azo]-7-nitro
  • 1-Naphthalenesulfonicacid,3-hydroxy-4-[(1-hydroxy-2-naphthalenyl)azo]-7-nitro-,monosodiumsalt
  • abcolchromeblacktn
  • abcolchromenavyrzn
  • acidchromeblacket
  • chromogeneblackt160
  • czernkwasowo-chromowaetn
  • DiacromoBlackPPS
  • diacromoblackpss
  • OmegaChromeBlackT,S,TDW
  • SalicinchromeBlackHC
  • solochromeblackwdfa
  • EBT
  • DIAMOND BLACK
  • CI 14645
  • CHROME BLACK T
  • CI NO 14645
  • COMPLEX ERIOCHROME BLACK T
  • F-241
  • ERIO T
  • ERIOCHROME BLACK T COMPLEX
  • ERIOCHROME BLACK T METHANOLIC SOLUTION
  • ERIOCHROME BLACK T (MONOSODIUM SALT)
  • ERIOCHROME BLACK T(R)
  • ERIOCHROME BLACK TS
  • ERIOCHROME BLACK T SUPRA
  • ERIOCHRONE BLACK T
  • ERIOCHROME(R) BLACK T
  • ERIOCHROME(R) BLACK T REAGENT
  • ERIOCHROME BLACK
  • ERIOCHROME BLACK T
  • ERICHROME BLACK T
  • 1-(1-HYDROXY-2-NAPHTHYLAZO)-6-NITRO-2-NAPHTHOL-4-SULFONIC ACID SODIUM SALT
  • MAN VER INDICATOR
  • LABOTEST-BB LT01148367
  • 2-HYDROXY-1-(1-HYDROXY-2-NAPHTHYLAZO)-6-NITRONAPHTHALENE-4-SULFONIC ACID SODIUM SALT
  • 1-Naphthalenesulfonic acid, 3-hydroxy-4-[(1-hydroxy-2-naphthyl)azo]-7-nitro-, monosodium salt
  • 2-Hydroxy-1-(1-hydroxy-2-naphthylazo)-6-nitro-4-naphthalenesulfonic acid, sodium salt
  • Color index
  • Mordant Black 11 (14650)
  • Mordant Black T
  • sodium 3-hydroxy-4-[(1-hydroxy-2-naphthyl)azo]-7-nitronaphthalene-1-sulphonate
  • BT
  • Acid mordant Black 11
  • Chrome Black ETS
  • ERIOCHROME BLACK T, A.C.S. REAGENT, INDI CATOR GRADE
  • C.I.4645
  • Eriochrome Black T p.a.
  • C.I.Mordant black II
  • EriochroMe (TM) Black T
  • EriochroMe Black T, pure, indicator grade
  • EriochroMe Black T, indicator grade, pure 100GR
  • 1-(1-Hydroxy-2-naphthylazo)-6-nitro-2-naphthol-4-sulfonic Acid Sodium Salt Mordant Black 11
  • Complex Eriochrome Black T Man Ver Indicator
  • ERIOCHROME BLACK T (C.I. 14645) METAL IN
  • TEriochroMe bla
  • Black T, indicator