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12270-45-0 Usage


2,6-Dibromo-4-nitroaniline diazo, and N-ethyl-N-cyanoethylaniline?coupling.

Properties and Applications

Dark red light orange. Deep orange powder. Used for polyester and their blended fabric dyeing and printing Standard Ironing Fastness Light Fastness Persperation Fastness Washing Fastness Fading Stain Fading Stain Fading Stain ISO 5 4 6-7 5 5 5 5


Ironing Fastness





Check Digit Verification of cas no

The CAS Registry Mumber 12270-45-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,2,2,7 and 0 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 12270-45:
70 % 10 = 0
So 12270-45-0 is a valid CAS Registry Number.



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

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017


1.1 GHS Product identifier

Product name Disperse Orange 61

1.2 Other means of identification

Product number -
Other names 3-((4-((2,6-Dibromo-4-nitrophenyl)azo)phenyl)ethylamino)propiononitrile

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:12270-45-0 SDS

12270-45-0Downstream Products

12270-45-0Relevant articles and documents

Clean synthesis of disperse azo dyes based on peculiar stable 2,6-dibromo-4-nitrophenyl diazonium sulfate

Qiu, Jinjing,Tang, Bingtao,Ju, Benzhi,Zhang, Shufen,Jin, Xin

, (2020)

The development of clean synthetic technology of disperse azo dyes is essential for the dye industry due to ecological and economical demands. In this study, a clean, safe, and low-energy-consumption method for preparing disperse azo dyes based on 2,6-dibromo-4-nitroaniline is presented with excellent yield and short reaction time. The peculiar stable diazonium sulfate of 2,6-dibromo-4-nitroaniline is precipitated from the organic reaction system, and the solid diazonium salt is directly used to synthesize disperse azo dyes. Compared with traditional method, the amount of sulfuric acid used is reduced by 80%, the amount of waste inorganic salt is reduced by 80.9% and the heat released from the reaction system is reduced by 88.5% in the proposed method. The dye structures are verified by 1H NMR, 13C NMR, Fourier transform infrared spectroscopy (FT-IR), and high resolution mass spectrometry (HR-MS). Compared with commercial dyes, the prepared dyes have the same dyeing properties that are sufficient for industrial applications.

Diazotization method of wet nitroaniline


Paragraph 0016-0019, (2019/01/05)

The invention provides a diazotization method of wet nitroaniline, and relates to the field of dye synthesis. The diazotization method comprises following steps: step one, evenly stirring sulfuric acid (98%) and nitrosyl sulfuric acid (40%) in a diazotization reactor; and step two, adding wet nitroaniline into the diazotization reactor at a controlled temperature of -10 to 40 DEG C to obtain diazotization salts, wherein the mole ratio of sulfuric acid to nitrosyl sulfuric acid to diazotization component is 1.0-6: 1.02-1.1: 1. The quality of the provided wet dye is the same as that of a dry product, the diazotization component does not need to be dried, and the provided dye is energy saving and environmentally friendly.

Stable diazonium salts of weakly basic amines—Convenient reagents for synthesis of disperse azo dyes

Qiu, Jinjing,Tang, Bingtao,Ju, Benzhi,Xu, Yuanji,Zhang, Shufen

, p. 63 - 69 (2016/08/24)

A new synthetic strategy for industrially important deep-shade disperse azo dyes was presented in this study. The key procedure is to prepare stable solid diazonium salts of weakly basic amines in the absence of concentrated sulfuric acid. Diazotization by tert-butyl nitrite in ethyl acetate was allowed to proceed in the presence of equivalent 1,5-naphthalenedisulfonic acid as stabilizer of diazonium salts and donor of hydrogen ion for the reaction. The separated solid diazonium salts exhibited good thermal stability. The corresponding disperse azo dyes were subsequently synthesized through the azo-coupling of the prepared solid diazonium salts with a range of aromatic tertiary amines. The azo dyes were produced in short reaction time, excellent yields, mild reaction conditions, simple experimental procedure and low energy consumption.

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