Direct Black 19

99% Purity Commercial production Direct Black 19 6428-31-5 with Cheapest Price We provide high quality Direct Black 19 (CAS 6428-31-5), at a very affordable prices to our customers.

1.What is the Direct Black 19 ?

Direct Black 19 is a black powder that is soluble in water, producing a green light black color with a solubility of 100 g/L at 80°C. It is slightly soluble in ethanol and acetone. When exposed to strong sulfuric acid, it turns green and then dark black upon dilution, while in nitric acid, it turns dark brown. The dye also exhibits a 10% red color in a sulfuric acid solution and turns green light blue when a thick sodium hydroxide solution is added. The presence of copper ions in the dyeing process results in a green color shade, while iron ions cause a slight color change.

Used in Textile Industry:
Direct Black 19 is used as a dye for various types of fabrics, including viscose, cotton knitwear, blankets, flannelette, silk, and wool/viscose fiber blend fabrics. It is particularly useful in the dyeing and printing of viscose fabric.
Used in Leather Industry:
Direct Black 19 is also used in the leather industry for dyeing and coloring processes.
Used in Paper Industry:
The dye is utilized in the paper industry to provide color to paper products.
Used in Electrochemical Aluminum Coloring:
Direct Black 19 is employed in the electrochemical process of coloring aluminum.
Standard:
The standard for Direct Black 19 includes the following properties:
Acid Resistance: ISO 4, AATCC 4-5
Alkali Resistance: ISO 3, AATCC 3
Light Fastness: ISO 3-4, AATCC 3
Soaping: ISO 2, AATCC 2-3
Water Fading: Not specified
Stain: Not specified
Fading: Not specified
These properties indicate the performance and durability of Direct Black 19 in various applications, making it a versatile dye for different industries.

2.What is the CAS number for Direct Black 19 ?

The CAS number of Direct Black 19 is 6428-31-5.

More information of Direct Black 19 6428-31-5 are:

3.What is the molecular formula of Direct Black 19 ?

The chemical formula of?Direct Black 19 is C34H27N13Na2O7S2 which containing 34 Carbon atoms,27 Hydrogen atoms,13 Nitrogen atoms,2 Sodium atoms,7 Oxygen atoms and 2 Sulfur atoms,and the molecular weight, and the molecular weight of Direct Black 19 is 839.77

4.What is Direct Black 19(6428-31-5)used for?

Direct Black 19 is a black powder that is soluble in water, producing a green light black color with a solubility of 100 g/L at 80°C. It is slightly soluble in ethanol and acetone. When exposed to strong sulfuric acid, it turns green and then dark black upon dilution, while in nitric acid, it turns dark brown. The dye also exhibits a 10% red color in a sulfuric acid solution and turns green light blue when a thick sodium hydroxide solution is added. The presence of copper ions in the dyeing process results in a green color shade, while iron ions cause a slight color change.

InChI:InChI=1/C34H29N13O7S2.2Na/c35-18-1-11-26(24(37)15-18)44-40-20-3-7-22(8-4-20)42-46-32-28(55(49,50)51)13-17-14-29(56(52,53)54)33(34(48)30(17)31(32)39)47-43-23-9-5-21(6-10-23)41-45-27-12-2-19(36)16-25(27)38;;/h1-16,48H,35-39H2,(H,49,50,51)(H,52,53,54);;/q;2*+1/p-2/b44-40+,45-41+,46-42+,47-43+;;

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5.99% Purity Commercial production Direct Black 19 6428-31-5 with Cheapest Price

Hubei Farmature Biotechnology Co., Ltd is a quality supplier of Direct Black 19. Our main goal is customer satisfaction. Contact us to negotiate the best price for your business on Direct Black 19 6428-31-5.