Sulfide blue 15 is an organic dye, and its chemical name is methylene blue. The following is an introduction to the properties, uses, production methods, and safety information of sulfur blue 15:
Nature:
1. It is a dark blue crystal with good solubility.
2. Has good light stability and is not easily faded.
3. It is a weakly acidic dye that appears blue under acidic conditions and red under alkaline conditions.
Usage:
1. Mainly used in the dye industry, especially in textile dyeing.
2. It can dye fibers such as wool, linen, and cotton to produce a vibrant blue color.
3. Used as an indicator in pigment preparation, dye ink production, and certain chemical experiments.
Method:
It is generally carried out through the reaction of ortho nitroaniline and caustic soda (sodium hydrogen sulfide). The specific step is to heat the reaction between ortho nitroaniline and caustic soda under appropriate temperature and reaction conditions to produce the crystallization of sulfur blue 15.
Security information:
In general, it is relatively safe, but the following precautions still need to be taken:
1. Avoid direct contact with skin and eyes to avoid irritation or allergic reactions;
2. Pay attention to fire and explosion prevention measures during operation and storage;
3. Ventilation measures should be taken during use to avoid inhaling dust.