The company was founded in 1998
Tianjin Daqiuzhuang Hongda Chemical Co., Ltd.
Tianjin Daqiuzhuang Hongda Chemical Co., Ltd. was founded in 1998 and focuses on the research and development and production of acid dyes and dye intermediates. Core products include Acid Golden Yellow G, Acid Red A, Weak Acid Blue AS, Acid Scarlet 3R, Acid Scarlet GR, Acid Black ATT, Acid Black 10B and intermediates such as aminobenzenesulfonic acid, which are widely used in leather, textiles, wood and other fields.
Company founded in
Product System
Number of cooperative customers





Our Products
Focuses on the research and development and production of acid dyes and dye intermediates.
Directly acid-resistant jujube red
Direct Brown MS
Direct deep brown M
Direct big red 4BE
Direct reddish-brown RN
Acid Yellow G

Directly acid-resistant jujube red
C.I. No.: Direct Red 23, acid-resistant jujube red, direct acid-resistant red sauce
CAS No.: 3441-14-3
EINECS No.: 222-348-4
Molecular Formula: C35H27N7O10S2
Molecular Weight: 769.7598

Direct Brown MS
C.I. No.: Direct Brown 2
CAS No.: 2429-82-5
EINECS No.: 219-391-6
Molecular Formula: C29H19N5Na2O7S
Molecular Weight: 627.54

Direct deep brown M
C.I. No.: Direct Deep Brown MM, Direct Deep Brown MN
CAS Registry Number: 2429-82-5
EINECS Number: 219-391-6
Molecular Formula: C29H19N5Na2O7S
Molecular Weight: 627.54

Direct big red 4BE
C.I. No.: 22120, Direct Red 28, Congo Red, Direct Bordeaux 4B, Direct Crimson
CAS No.: 573-58-0
EINECS No.: 209-358-4
Molecular Formula: C32H22N6Na2O6S2
Molecular Weight: 696.6632

Direct reddish-brown RN
C.I. Number: Direct Blend Brown D-NBR, Direct Lightfast Brown BRL
CAS Number: 16071-86-6
EINECS Number: 240-221-1
Molecular Formula: C31H20N6Na2O9S
Molecular Weight: 698.57

Acid Yellow G
C.I. No.: 13065, Acid Yellow 36, Soap Yellow, Golden Orange Yellow G, Metanilic Yellow, Metanil Yellow, Acid Soap Yellow, Acid Golden Yellow 2G, Acridine Yellow
CAS No.: 587-98-4
EINECS No.: 209-608-2
Molecular Formula: C₁₈H₁₄N₃NaO₃S
Molecular Weight: 375.3768
Our Products
Focuses on the research and development and production of acid dyes and dye intermediates.
Honors
The company relies on high-quality product quality, a professional quality control system, strict corporate standards and a perfect management system

Qualifications and Honors

Qualifications and Honors

Qualifications and Honors

Qualifications and Honors
Process Flow
The company relies on high-quality product quality, a professional quality control system, strict corporate standards and a perfect management system

Raw material control: The chemical raw materials are inspected and tested according to the company's standards.

The standard samples determined by both parties are used as the detection standard, and the testing is carried out according to the customer's application field and testing method.

To minimize the detection errors of both parties. Striving to achieve the detection effect of our laboratory, which is the same as the customer's use effect.
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