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We mainly produce acid dyes and dye intermediates, and we are a professional Wholesale Acid Yellow 199 dyes manufacturer of anthraquinone acid dyes in China.

  • Acid Yellow 199
  • Acid Yellow 199
  • Acid Yellow 199
  • Acid Yellow 199
  • Acid Yellow 199
  • Acid Yellow 199
Tnyanyl® E Dyes Series

Acid Yellow 199
Weakly acidic yellow A-4R

Properties:
- No blocking effect, good covering properties
- Good dyeing properties, excellent combinability
- Excellent levelling and migration properties
- High light fastness, wide range of shades
- Levelling acid dyes with monosulfonic group

Application:
Is mainly used for dyeing pale shades in nylon,  along with other fibers of the same color, and is used heavily in wool dyeing.
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Dye Name Color Card
Light (Xenon)

Solubility(90℃g/L)
Dyeing Depth
Water
Washing
(50°C)
ISO 105 C10

Perspiration
(ALkali)
ISO 105 E04
Rubbing
ISO 105 X12
Hot Pressing 
Chlorination water 
o.w.f%
Ch 
Pa 

Co 
Ch 
Pa 
Co 
Ch 
Pa 
Co 
Dry Rub
Wet Rub
(180°)
50mg/L
Acid Yellow 199 5-6
1 4-5
3-4
4
 3    
4   

 3-4    
4-5    
3   
 3-4    
4-5 4-5 4
 3-4

Dye Name: Weak Acid Yellow-4R, Acid Yellow A4GR
CAS Registry Number: 70865-20-2
Character: Orange powder, soluble in water. It has a bright orange hue.
Molecular Structure: Monoazo
Molecular Formula: C19H15N4NaO6S
Molecular Weight: 450.40
Samples: Free samples are available, PSS can be sent to you before shipment. The quality of this item is very stable and once you confirm the quality we can deliver to you directly without PSS.
Tianya Industry is a fine chemical enterprise that engages in R&D, production, and operation of acid dyes and intermediates, which has obtained an ISO9001 certificate. Contact us freely for more details.

Latest News

Industry knowledge

What is the environmental performance of Weakly acidic yellow A-4R? Does Tianya have environmentally friendly production and treatment measures for this product that meet the green standards of the international market?

Environmental performance of Weakly acidic yellow A-4R
Weakly acidic yellow A-4R is a commonly used acid dye, widely used in industries such as textiles, leather and paper. As a chemical dye, its environmental performance is one of the key considerations for modern chemical products. Environmental performance is not only related to the use effect of the product, but also involves waste emissions during the production process, safety to the human body and impact on the ecological environment.

Impact on the environment
Weakly acidic yellow A-4R has a high stability in aqueous solution, which means that it can maintain low volatility during the dyeing process, reducing the risk of air pollution. However, the use of dyes and wastewater discharge are one of the important environmental issues in the chemical industry. For weakly acidic yellow A-4R dyes, the key environmental issue is the treatment of emissions during the dyeing process and after use. If these dyes are too concentrated in wastewater or are not adequately treated, they may pollute the water body and affect the water quality and the ecological environment of aquatic organisms.

Biodegradability
Another key factor in environmental performance is the biodegradability of the dye. Many traditional dyes have poor biodegradability due to their complex molecular structure and are prone to persist in the environment, causing accumulation and pollution. However, Weakly acidic yellow A-4R has been optimized during the production process to make it biodegradable after use. Dyes with good biodegradability can be decomposed by microorganisms, reducing the long-term burden on the environment.

Safety to the human body
Another dimension of environmental performance is the impact of dyes on the health of users. Weakly acidic yellow A-4R dye meets international safety standards and does not release substances that are harmful to the human body during the dyeing process. For example, it does not contain certain toxic heavy metal ions (such as lead, cadmium, chromium, etc.), and the pH value in the aqueous solution is maintained in the weakly acidic range, avoiding the irritation of strong acids to the skin and respiratory system. Therefore, weakly acidic yellow A-4R dye is safer during production and use, and will not pose a significant threat to the health of operators.

Tianya's environmentally friendly production measures
As an enterprise that has long been committed to innovation, standardized production and quality control, Hangzhou Tianya Industry Co., Ltd. is well aware of the importance of environmental protection in chemical production. The company has taken a series of environmental protection measures in the production process to ensure that the weak acid yellow A-4R dye meets the green standards of the international market and minimizes the impact on the environment during production and use.

Compliance with international environmental certification standards
Tianya strictly follows international environmental certification and quality management systems such as ISO 9001 and ISO 14001 in the production of weak acid yellow A-4R dye. These certifications require the company to strictly control pollution emissions in product design, production and supply chain management, and ensure that the treatment of wastewater, waste gas and solid waste meets international environmental standards. In addition, Tianya has also strengthened its connection with environmental protection regulations of various countries to ensure that its products meet the environmental protection requirements of the export market.

Application of green production process
Tianya adopts green chemical technology and clean production process in the production process of weak acid yellow A-4R dye. These processes reduce the negative impact on the environment by reducing the energy consumption of raw materials, reducing the emission of waste gas and wastewater, and optimizing the production process. Through precise control of chemical reactions, Tianya reduces the harmful byproducts that may be produced during the production process, ensures the controllability of factory emissions and reduces pollution to the external environment.

Wastewater treatment and recycling
Wastewater treatment in dye production is an important part of environmental protection work. Tianya has invested in advanced wastewater treatment equipment for the production wastewater of weak acid yellow A-4R dye, and established a wastewater recovery and recycling system. Through physical, chemical and biological treatment methods, Tianya can effectively remove harmful substances and residual chemical components in dyes to meet the emission standards required by domestic and foreign environmental protection regulations. The treated water not only meets environmental protection requirements, but can also be recycled and used in other links of the production process, reducing the waste of water resources.

Green packaging and waste management
Tianya also pays attention to the environmental protection of product packaging. In order to reduce the burden of plastic packaging on the environment, the company uses recyclable and degradable green packaging materials. By optimizing the packaging design, the use of packaging materials is reduced. In addition, Tianya has also taken strict waste management measures to classify and treat solid waste (such as waste materials, dye residues, etc.) generated during the production process, and ensure compliance with relevant environmental protection regulations to reduce pollution to land and water sources.

Continuous Innovation and Environmental Protection R&D
Tianya continues to increase its R&D investment in environmental protection technology and green production. The company has a dedicated environmental protection technology R&D team to continuously promote the green improvement of dye products and production processes. For example, by developing more environmentally friendly alternative chemicals, reducing the use of harmful substances, improving the biodegradability and low toxicity of dyes, and promoting the application of environmentally friendly dyes. In addition, Tianya has also made significant progress in improving the reproducibility of products, saving energy and reducing carbon emissions.

Green standards in the international market
Tianya's environmental protection measures are not only limited to the domestic market, but also focus on meeting the green standards of the international market. Many countries and regions have very strict environmental protection requirements for chemical products, especially for export markets for dye products, such as the European Union, Japan, the United States, etc. Tianya strictly abides by the environmental protection regulations of these markets to ensure the compliance and competitiveness of its weak acid yellow A-4R dye in the global market. By complying with green certification and environmental protection standards, Tianya has laid a solid foundation for the sales and promotion of its products worldwide.