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C.I.Direct Black 178

4-amino-3-[[4-[[[4-[(2,4-diaminophenyl)azo]phenyl]amino]carbonyl]phenyl]azo]-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonic acid

CAS: 37405-95-1

Molecular Formula: C35H28N10O8S2

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C.I.Direct Black 178 - Names and Identifiers

Name 4-amino-3-[[4-[[[4-[(2,4-diaminophenyl)azo]phenyl]amino]carbonyl]phenyl]azo]-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonic acid
Synonyms Direct Black 178
C.I.Direct Black 178
4-Amino-3-[[4-[[[4-[(2,4-diaminophenyl)azo]phenyl]amino]carbonyl]phenyl]azo]-5-hydroxy-6-(phenylazo)-2,7-naphthalenedisulfonic acid
4-amino-3-[[4-[[[4-[(2,4-diaminophenyl)azo]phenyl]amino]carbonyl]phenyl]azo]-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonic acid
CAS 37405-95-1
EINECS 253-493-1

C.I.Direct Black 178 - Physico-chemical Properties

Molecular FormulaC35H28N10O8S2
Molar Mass780.8

C.I.Direct Black 178 - Introduction

4-amino-3-[[4-[[[4-[(2,4-diaminophenyl)azo]phenyl]amino]carbonyl]phenyl]azo]-5-hydroxy-6-(phenylazo)naphthalene-2, 7-diulphonic acid, also known as Direct Red 81, is a chemical dye. The following is a description of its nature, use, formulation and safety information:

Nature:
-Appearance: Red crystalline powder
-Molecular formula: C34H24N8O9S2
-Molecular weight: 760.73g/mol
-Solubility: soluble in water, slightly soluble in alcohol, insoluble in organic solvents

Use:
- Direct Red 81 is an important Red dye, commonly used in the dye industry, textile dyeing and printing fields. It can react with hydroxyl groups in fiber materials such as cellulose to obtain a bright red dyeing effect.
-In addition, Direct Red 81 can also be used as an indicator for chemical analysis, fluorescent probes and staining reagents in biochemical experiments.

Preparation Method:
- Direct Red 81 is through 4-Amino-2, 7-dinitronaphthalenesulfonic acid (4-Amino-2, acid) and 2, 4-diaminoaniline was synthesized by coupling reaction under alkaline conditions.

Safety Information:
- Direct Red 81 is generally considered safe under proper conditions of use and storage.
-Since it is a dye, care should be taken to avoid direct contact with the skin, eyes and respiratory tract, while maintaining adequate ventilation.
-Wear appropriate personal protective equipment such as gloves, goggles and masks when used.
-If skin contact or inhalation occurs, please wash or move to fresh air immediately, and seek medical help if necessary. If taken by mistake, seek medical attention immediately.
Last Update:2024-04-10 22:29:15
C.I.Direct Black 178
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C.I.Direct Black 178
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