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3618-58-4

Eriochrome Black A, also known as Solochrome Black, is a synthetic azo dye characterized by its blue light gray to black color. It appears as a black powder and is soluble in water, producing a navy blue color with a water solubility of 60 g/l at 80°C. It is slightly soluble in ethanol and acetone. When dissolved in concentrated sulfuric acid, it turns blue and turns yellow upon dilution to light brown. In concentrated nitric acid, it exhibits a red-orange color. Its aqueous solution is navy blue, which turns pale yellow light brown upon the addition of concentrated hydrochloric acid. When strong caustic is added, it turns orange brown. Eriochrome Black A is used for dyeing wool, producing a light purple color with slight white streaks when dyed in nitric acid.

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  • 3618-58-4 Structure

  • Basic information

    1. Product Name: Eriochrome Black A
    2. Synonyms: Acid mordant Black 1;1-Naphthalenesulfonic acid, 3-hydroxy-4-(2-hydroxy-1-naphthalenyl)azo-7-nitro-, monosodium salt;C.I.MORDANTBLACK1;Acid chrome black A;Chromogene Black VA;Diacromo Black AS;Mordant black 1 (C.I. 15710);2',3-Dihydroxy-7-nitro-(1',4-azobisnaphthalene)-1-sulfonic acid sodium salt
    3. CAS NO:3618-58-4
    4. Molecular Formula: C20H12N3NaO7S
    5. Molecular Weight: 461.38
    6. EINECS: 222-807-9
    7. Product Categories: N/A
    8. Mol File: 3618-58-4.mol
    9. Article Data: 0

  • Chemical Properties

    1. Melting Point: N/A
    2. Boiling Point: N/A
    3. Flash Point: N/A
    4. Appearance: /
    5. Density: 1.64g/cm3
    6. Refractive Index: 1.747
    7. Storage Temp.: N/A
    8. Solubility: N/A
    9. CAS DataBase Reference: Eriochrome Black A(CAS DataBase Reference)
    10. NIST Chemistry Reference: Eriochrome Black A(3618-58-4)
    11. EPA Substance Registry System: Eriochrome Black A(3618-58-4)

  • Safety Data

    1. Hazard Codes: N/A
    2. Statements: N/A
    3. Safety Statements: N/A
    4. WGK Germany:
    5. RTECS:
    6. HazardClass: N/A
    7. PackingGroup: N/A
    8. Hazardous Substances Data: 3618-58-4(Hazardous Substances Data)

3618-58-4 Usage

Uses

Used in Textile Industry:
Eriochrome Black A is used as a dye for wool fabric, providing excellent colorfastness properties. It is also suitable for dyeing silk and nylon, as well as for dyeing wool and various fiber blended fabrics. Additionally, it can be used for direct printing on wool fabric after acetic acid chromium pretreatment.
Used in Leather Industry:
Eriochrome Black A is also utilized in the leather dyeing process, offering a deep and vibrant color to the leather products.
Standard:
Eriochrome Black A meets various industry standards for colorfastness, including:
Ironing Fastness: ISO 4-5, AATCC 4-5
Light Fastness: ISO 5, AATCC 5
Fulling: ISO 4-5, AATCC 4-5
Perspiration Fastness: ISO 5, AATCC 5
Soaping: ISO 5, AATCC 5
Water: ISO 5
Alkali: ISO 5
Acid: ISO 5

Preparation

4-Amino-3-hydroxy-7-nitronaphthalene-1-sulfonic acid diazotization, and Naphthalen-2-ol coupling.

Standard

Ironing Fastness

Alkali

Acid

ISO

4-5

AATCC

4-5

Check Digit Verification of cas no

The CAS Registry Mumber 3618-58-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,6,1 and 8 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 3618-58:
(6*3)+(5*6)+(4*1)+(3*8)+(2*5)+(1*8)=94
94 % 10 = 4
So 3618-58-4 is a valid CAS Registry Number.
InChI:InChI=1/C20H13N3O7S/c24-16-8-5-11-3-1-2-4-13(11)19(16)21-22-20-14-7-6-12(23(26)27)9-15(14)18(10-17(20)25)31(28,29)30/h1-10,21,24H,(H,28,29,30)/b22-20-

3618-58-4SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 11, 2017

Revision Date: Aug 11, 2017

1.Identification

1.1 GHS Product identifier

Product name Eriochrome Black A

1.2 Other means of identification

Product number -
Other names CHROME BLACK A

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:3618-58-4 SDS

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