Nigrosine (8005-03-6)

With the CAS registry number 8005-03-6,?Nigrosine is also named as?Acid black 2;?Nigrosine wl water soluble. The product's categories are?staining solutions for capsule stainingmicroscopy reagents and kits; staining solutions for negative staining; microscopy reagents and kits; staining solutions. It is?black crystals or powder which is?stable, combustible and?incompatible with strong oxidizing agents.?In addition, this chemical is soluble in water, ethanol, almost insoluble in ether, acetone, benzene, chloroform, petroleum ether, and liquid paraffin. The?water solution is blue-violet.?And the other registry numbers are?12227-81-5,?245669-68-5,?69073-21-8 and?73904-83-3.

Preparation of Nigrosine:?Using alcohol-soluble aniline black as raw material.?Sulfonated with?concentrated sulfuric acid,?removed the waste acid, washed, and then?neutralizd with?sodium hydroxide. After filtering and drying, we can get the product.

Uses of Nigrosine: It is mainly used?to?dye?wool, silk and leather (usually by the chromium mordant), and also used to color paper, wood products, soap, foil, as well as used?in the?manufacture of ink. In addition, it is also?used as color lakes in?colored paper and printing for color.

When you are using this chemical, please be cautious about it as the following:
It may cause sensitization by skin contact, so people should?not breathe dust and avoid contact with skin and eyes.?If you want to contact this product, you must wear suitable protective clothing and gloves.

Cosmetic colorant.