477-73-6 Usage
Description
Basic Red 2 is a red dye that fluoresces when exposed to selected wavelengths of light. It is a dark red to violet powder that is soluble in water for red, soluble in ethanol with yellow-red fluorescent red. The strong sulfuric acid turns it green, and when diluted by blue, it becomes red. The dye solution, when joined with sodium hydroxide, produces a light brown red precipitate, and when joined with hydrochloric acid, it turns blue-purple.
Uses
Used in Biological Staining:
Basic Red 2 is used as a biological stain for staining Gram-negative bacteria, chromosomes, mucin, cartilage, and mast cells. It is particularly useful in the field of environmental testing and dyes and metabolites analysis.
Used in Forensic Science:
In forensics, Basic Red 2 is used to visualize details of cyanoacrylate-fumed friction ridges of human digits, aiding in the identification and analysis of fingerprints.
Used in Textile Industry:
Basic Red 2 is used in the paper-making industry and color-up manufacturing. It is also used for dyeing acrylic, linen, and silk products. The dye has standard properties such as light fastness (C 1-2), perspiration fastness (2), ironing fastness (2-3), soaping (2-3), and fading (5).
Preparation
commonly known as Safranine T. Such molecular ratio of 2-Methylbenzene-1 ,4-diamine, and O-Methylaniline oxidation, the resulting condensation product of aniline and purified by precipitation segmented dye, and then converted to the chloride.
Standard( Cotton )
Light Fastness
Fading
Stain
C
1-2
Purification Methods
Crystallise it from *benzene/MeOH (1:1) or water. Dry it in vacuo over H2SO4. It has UV: at 520nm (H2O) and 530nm (EtOH). [Beilstein 25 H 403, 25 I 657, 25 III/IV
Check Digit Verification of cas no
The CAS Registry Mumber 477-73-6 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,7 and 7 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 477-73:
(5*4)+(4*7)+(3*7)+(2*7)+(1*3)=86
86 % 10 = 6
So 477-73-6 is a valid CAS Registry Number.
InChI:InChI=1/C20H18N4.ClH/c1-12-8-17-19(10-15(12)21)24(14-6-4-3-5-7-14)20-11-16(22)13(2)9-18(20)23-17;/h3-11H,1-2H3,(H3,21,22);1H