The Chinese Chemical Industry Standard CN-HG HG/T 4157～4158-2023, published on January 1, 2023, introduces the specifications for two important acid dyes: C.I. Acid Yellow 117 (Acid Brilliant Yellow P-3R) and C.I. Acid Red 249 (Acid Brilliant Red P-5B). This standard aims to provide detailed technical requirements and testing methods that ensure the quality, stability, and performance of these acid dyes in various industrial applications.
The specifications outlined in this standard cover critical aspects such as dye composition, purity levels, lightfastness, washfastness, and chemical resistance. Additionally, it includes guidelines for safe handling, storage conditions, and transportation procedures to ensure the integrity and safety of these acid dyes throughout their lifecycle.
By adhering to HG/T 4157～4158-2023, manufacturers and users can guarantee consistent quality across different batches and suppliers, thereby enhancing product reliability and reducing variability in dyeing processes. This standard plays a crucial role in advancing the chemical industry's commitment to delivering high-performance acid dyes that meet global standards.
*** Please note: This description may not be accurate, please refer to the official documentation.
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